From eedbd182d1fbd7d031a8587b5cb3b49e5c742b7c Mon Sep 17 00:00:00 2001
From: sergio <sergio>
Date: Mon, 2 Nov 2015 11:54:27 -0800
Subject: [PATCH] ENH: Adding solar radiation modelling and tutorial changes

---
 .../viewFactorsGen/searchingEngine.H          |   17 -
 .../preProcessing/viewFactorsGen/shootRays.H  |    2 +-
 .../viewFactorsGen/viewFactorsGen.C           |  426 +++----
 src/thermophysicalModels/radiation/Make/files |   16 +-
 .../radiation/Make/options                    |    8 +-
 .../MarshakRadiationFvPatchScalarField.C      |   69 +-
 .../MarshakRadiationFvPatchScalarField.H      |    7 +-
 ...iationFixedTemperatureFvPatchScalarField.C |   63 +-
 ...iationFixedTemperatureFvPatchScalarField.H |    9 +-
 .../boundaryRadiationPropertiesFvPatchField.C |  570 +++++++++
 .../boundaryRadiationPropertiesFvPatchField.H |  212 ++++
 ...iffusiveRadiationMixedFvPatchScalarField.C |   61 +-
 ...iffusiveRadiationMixedFvPatchScalarField.H |   13 +-
 ...veViewFactorFixedValueFvPatchScalarField.C |   60 +-
 ...veViewFactorFixedValueFvPatchScalarField.H |   21 +-
 .../radiationCoupledBase.C                    |  248 ----
 .../radiationCoupledBase.H                    |  172 ---
 ...iffusiveRadiationMixedFvPatchScalarField.C |   60 +-
 ...iffusiveRadiationMixedFvPatchScalarField.H |   25 +-
 .../radiationModels/fvDOM/fvDOM/fvDOM.C       |   80 +-
 .../radiationModels/fvDOM/fvDOM/fvDOM.H       |   28 +-
 .../radiationModels/fvDOM/fvDOM/fvDOMI.H      |    6 +
 .../radiativeIntensityRay.C                   |   62 +-
 .../radiationModel/radiationModel.C           |   31 +-
 .../radiationModel/radiationModel.H           |   17 +
 .../solarLoad/faceShading/faceShading.C       |  447 +++++++
 .../solarLoad/faceShading/faceShading.H       |  165 +++
 .../radiationModels/solarLoad/solarLoad.C     | 1043 +++++++++++++++++
 .../radiationModels/solarLoad/solarLoad.H     |  255 ++++
 .../radiationModels/viewFactor/viewFactor.C   |  127 +-
 .../radiationModels/viewFactor/viewFactor.H   |   19 +-
 .../greyMeanSolidAbsorptionEmission.C         |    4 +-
 .../greyMeanSolidAbsorptionEmission.H         |   18 +-
 .../multiBandSolidAbsorptionEmission.C        |  158 +++
 .../multiBandSolidAbsorptionEmission.H        |  147 +++
 .../boundaryRadiationProperties.C             |  219 ++++
 .../boundaryRadiationProperties.H             |  143 +++
 .../solarCalculator/solarCalculator.C         |  294 +++++
 .../solarCalculator/solarCalculator.H         |  323 +++++
 .../constantTransmissivity.C                  |   94 ++
 .../constantTransmissivity.H                  |  111 ++
 .../multiBandSolidTransmissivity.C            |   96 ++
 .../multiBandSolidTransmissivity.H            |  132 +++
 .../noTransmissivity/noTransmissivity.C       |   91 ++
 .../noTransmissivity/noTransmissivity.H       |  101 ++
 .../transmissivityModel/transmissivityModel.C |   59 +
 .../transmissivityModel/transmissivityModel.H |  123 ++
 .../transmissivityModelNew.C                  |   61 +
 .../0/IDefault                                |    6 -
 .../pyrolysisRegion/radiationProperties       |    1 +
 .../constant/radiationProperties              |    1 +
 .../fireFoam/les/oppositeBurningPanels/0/G    |    5 -
 .../les/oppositeBurningPanels/0/IDefault      |    5 -
 .../constant/panelRegion/radiationProperties  |    1 +
 .../constant/radiationProperties              |    2 +
 .../fireFoam/les/smallPoolFire2D/0/G          |    3 -
 .../fireFoam/les/smallPoolFire2D/0/IDefault   |    3 -
 .../constant/boundaryRadiationProperties      |   37 +
 .../constant/polyMesh/boundary                |    2 +-
 .../constant/radiationProperties              |    4 +
 .../fireFoam/les/smallPoolFire3D/0/G          |    3 -
 .../fireFoam/les/smallPoolFire3D/0/IDefault   |    3 -
 .../constant/boundaryRadiationProperties      |   33 +
 .../constant/radiationProperties              |    3 +
 .../buoyantSimpleFoam/hotRadiationRoom/0/G    |   12 -
 .../constant/boundaryRadiationProperties      |   60 +
 .../constant/radiationProperties              |    1 +
 .../hotRadiationRoomFvDOM/0/IDefault          |    3 -
 .../constant/boundaryRadiationProperties      |   33 +
 .../constant/radiationProperties              |    2 +
 .../externalSolarLoad/0/air/G                 |   62 +
 .../externalSolarLoad/0/air/IDefault          |   62 +
 .../externalSolarLoad/0/air/Qr                |   62 +
 .../externalSolarLoad/0/air/T                 |   79 ++
 .../externalSolarLoad/0/air/U                 |   74 ++
 .../externalSolarLoad/0/air/alphat            |   64 +
 .../externalSolarLoad/0/air/epsilon           |   69 ++
 .../externalSolarLoad/0/air/k                 |   69 ++
 .../externalSolarLoad/0/air/nut               |   68 ++
 .../externalSolarLoad/0/air/p                 |   62 +
 .../externalSolarLoad/0/air/p_rgh             |  104 ++
 .../externalSolarLoad/0/floor/T               |   83 ++
 .../externalSolarLoad/0/floor/p               |   67 ++
 .../externalSolarLoad/0/solid/T               |   52 +
 .../externalSolarLoad/0/solid/p               |   42 +
 .../externalSolarLoad/Allclean                |   33 +
 .../externalSolarLoad/Allrun                  |   34 +
 .../externalSolarLoad/Allrun.pre              |   29 +
 .../constant/air/boundaryRadiationProperties  |   50 +
 .../externalSolarLoad/constant/air/g          |   20 +
 .../constant/air/radiationProperties          |   97 ++
 .../constant/air/thermophysicalProperties     |   49 +
 .../constant/air/turbulenceProperties         |   26 +
 .../constant/air/viewFactorsDict              |   22 +
 .../constant/floor/radiationProperties        |   42 +
 .../constant/floor/thermophysicalProperties   |   53 +
 .../constant/polyMesh.old/blockMeshDict       |   96 ++
 .../constant/polyMesh.old/boundary            |   59 +
 .../constant/polyMesh/boundary                |   59 +
 .../constant/regionProperties                 |   24 +
 .../constant/solid/radiationProperties        |   42 +
 .../constant/solid/thermophysicalProperties   |   53 +
 .../system/air/changeDictionaryDict           |  177 +++
 .../system/air/decomposeParDict               |   44 +
 .../externalSolarLoad/system/air/fvSchemes    |   64 +
 .../externalSolarLoad/system/air/fvSolution   |   73 ++
 .../externalSolarLoad/system/blockMeshDict    |   96 ++
 .../externalSolarLoad/system/controlDict      |   52 +
 .../externalSolarLoad/system/decomposeParDict |   50 +
 .../system/extrudeToRegionMeshDict            |   40 +
 .../system/floor/changeDictionaryDict         |   81 ++
 .../system/floor/decomposeParDict             |   44 +
 .../externalSolarLoad/system/floor/fvSchemes  |   53 +
 .../externalSolarLoad/system/floor/fvSolution |   44 +
 .../externalSolarLoad/system/fvSchemes        |   46 +
 .../externalSolarLoad/system/fvSolution       |   21 +
 .../system/solid/changeDictionaryDict         |   63 +
 .../system/solid/decomposeParDict             |   44 +
 .../externalSolarLoad/system/solid/fvSchemes  |   53 +
 .../externalSolarLoad/system/solid/fvSolution |   44 +
 .../externalSolarLoad/system/topoSetDict      |  131 +++
 .../coalChemistryFoam/simplifiedSiwek/0/G     |    9 -
 .../constant/boundaryRadiationProperties      |   41 +
 .../constant/radiationProperties              |    1 +
 124 files changed, 8733 insertions(+), 1081 deletions(-)
 create mode 100644 src/thermophysicalModels/radiation/derivedFvPatchFields/boundaryRadiationProperties/boundaryRadiationPropertiesFvPatchField.C
 create mode 100644 src/thermophysicalModels/radiation/derivedFvPatchFields/boundaryRadiationProperties/boundaryRadiationPropertiesFvPatchField.H
 delete mode 100644 src/thermophysicalModels/radiation/derivedFvPatchFields/radiationCoupledBase/radiationCoupledBase.C
 delete mode 100644 src/thermophysicalModels/radiation/derivedFvPatchFields/radiationCoupledBase/radiationCoupledBase.H
 create mode 100644 src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.C
 create mode 100644 src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.H
 create mode 100644 src/thermophysicalModels/radiation/radiationModels/solarLoad/solarLoad.C
 create mode 100644 src/thermophysicalModels/radiation/radiationModels/solarLoad/solarLoad.H
 create mode 100644 src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/multiBandSolidAbsorptionEmission/multiBandSolidAbsorptionEmission.C
 create mode 100644 src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/multiBandSolidAbsorptionEmission/multiBandSolidAbsorptionEmission.H
 create mode 100644 src/thermophysicalModels/radiation/submodels/boundaryRadiationProperties/boundaryRadiationProperties.C
 create mode 100644 src/thermophysicalModels/radiation/submodels/boundaryRadiationProperties/boundaryRadiationProperties.H
 create mode 100644 src/thermophysicalModels/radiation/submodels/solarCalculator/solarCalculator.C
 create mode 100644 src/thermophysicalModels/radiation/submodels/solarCalculator/solarCalculator.H
 create mode 100644 src/thermophysicalModels/radiation/submodels/transmissivityModel/constantTransmissivity/constantTransmissivity.C
 create mode 100644 src/thermophysicalModels/radiation/submodels/transmissivityModel/constantTransmissivity/constantTransmissivity.H
 create mode 100644 src/thermophysicalModels/radiation/submodels/transmissivityModel/multiBandSolidTransmissivity/multiBandSolidTransmissivity.C
 create mode 100644 src/thermophysicalModels/radiation/submodels/transmissivityModel/multiBandSolidTransmissivity/multiBandSolidTransmissivity.H
 create mode 100644 src/thermophysicalModels/radiation/submodels/transmissivityModel/noTransmissivity/noTransmissivity.C
 create mode 100644 src/thermophysicalModels/radiation/submodels/transmissivityModel/noTransmissivity/noTransmissivity.H
 create mode 100644 src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModel.C
 create mode 100644 src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModel.H
 create mode 100644 src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModelNew.C
 create mode 100644 tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/boundaryRadiationProperties
 create mode 100644 tutorials/combustion/fireFoam/les/smallPoolFire3D/constant/boundaryRadiationProperties
 create mode 100644 tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/constant/boundaryRadiationProperties
 create mode 100644 tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/constant/boundaryRadiationProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/G
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/IDefault
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/Qr
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/T
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/U
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/alphat
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/epsilon
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/k
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/nut
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/p
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/p_rgh
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/floor/T
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/floor/p
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/solid/T
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/solid/p
 create mode 100755 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allclean
 create mode 100755 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allrun
 create mode 100755 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allrun.pre
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/boundaryRadiationProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/g
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/radiationProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/thermophysicalProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/turbulenceProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/viewFactorsDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/floor/radiationProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/floor/thermophysicalProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh.old/blockMeshDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh.old/boundary
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh/boundary
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/regionProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/solid/radiationProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/solid/thermophysicalProperties
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/changeDictionaryDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/decomposeParDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/fvSchemes
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/fvSolution
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/blockMeshDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/controlDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/decomposeParDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/extrudeToRegionMeshDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/changeDictionaryDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/decomposeParDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/fvSchemes
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/fvSolution
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/fvSchemes
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/fvSolution
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/changeDictionaryDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/decomposeParDict
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/fvSchemes
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/fvSolution
 create mode 100644 tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/topoSetDict
 create mode 100644 tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/boundaryRadiationProperties

diff --git a/applications/utilities/preProcessing/viewFactorsGen/searchingEngine.H b/applications/utilities/preProcessing/viewFactorsGen/searchingEngine.H
index 8c94f372e2..df38326ded 100644
--- a/applications/utilities/preProcessing/viewFactorsGen/searchingEngine.H
+++ b/applications/utilities/preProcessing/viewFactorsGen/searchingEngine.H
@@ -23,21 +23,6 @@ dict.add
 );
 dict.add("mergeDistance", SMALL);
 
-labelHashSet includePatches;
-forAll(patches, patchI)
-{
-    const polyPatch& pp = patches[patchI];
-    if
-    (
-        !pp.coupled()
-     && !isA<cyclicAMIPolyPatch>(pp)
-     && !isA<emptyPolyPatch>(pp)
-    )
-    {
-        includePatches.insert(patchI);
-    }
-}
-
 labelList triSurfaceToAgglom(5*nFineFaces);
 
 const triSurface localSurface = triangulate
@@ -69,6 +54,4 @@ distributedTriSurfaceMesh surfacesMesh
 
 triSurfaceToAgglom.resize(surfacesMesh.size());
 
-//surfacesMesh.searchableSurface::write();
-
 surfacesMesh.setField(triSurfaceToAgglom);
diff --git a/applications/utilities/preProcessing/viewFactorsGen/shootRays.H b/applications/utilities/preProcessing/viewFactorsGen/shootRays.H
index d20b204f03..daa3425395 100644
--- a/applications/utilities/preProcessing/viewFactorsGen/shootRays.H
+++ b/applications/utilities/preProcessing/viewFactorsGen/shootRays.H
@@ -89,7 +89,7 @@ for (label procI = 0; procI < Pstream::nProcs(); procI++)
 
     DynamicList<label> dRayIs;
 
-    // Collect the rays which has not abstacle in bettween in rayStartFace
+    // Collect the rays which has not obstacle in bettween in rayStartFace
     // and rayEndFace. If the ray hit itself get stored in dRayIs
     forAll(hitInfo, rayI)
     {
diff --git a/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C b/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C
index bccf381ba1..ee7f6475b8 100644
--- a/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C
+++ b/applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C
@@ -29,33 +29,42 @@ Description
     (finalAgglom generated by faceAgglomerate utility).
 
     Each view factor between the agglomerated faces i and j (Fij) is calculated
-    using a double integral of the sub-areas composing the agglomaration.
+    using a double integral of the sub-areas composing the agglomeration.
 
-    The patches involved in the view factor calculation are taken from the Qr
-    volScalarField (radiative flux) when is greyDiffusiveRadiationViewFactor
-    otherwise they are not included.
+    The patches involved in the view factor calculation are taken from the
+    boundary file and should be part on the group viewFactorWall. ie.:
+
+    floor
+    {
+        type            wall;
+        inGroups        2(wall viewFactorWall);
+        nFaces          100;
+        startFace       3100;
+    }
 
 \*---------------------------------------------------------------------------*/
 
 #include "argList.H"
-#include "Time.H"
 #include "fvMesh.H"
-#include "singleCellFvMesh.H"
 #include "volFields.H"
 #include "surfaceFields.H"
-#include "fixedValueFvPatchFields.H"
 #include "distributedTriSurfaceMesh.H"
-#include "cyclicAMIPolyPatch.H"
-#include "mapDistribute.H"
 #include "meshTools.H"
+
 #include "uindirectPrimitivePatch.H"
 #include "DynamicField.H"
+#include "unitConversion.H"
+
 #include "scalarMatrices.H"
+#include "labelListIOList.H"
 #include "scalarListIOList.H"
 
+#include "singleCellFvMesh.H"
+
+#include "IOmapDistribute.H"
+
 using namespace Foam;
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 triSurface triangulate
 (
@@ -116,7 +125,7 @@ triSurface triangulate
         newPatchI++;
     }
 
-    triSurfaceToAgglom.resize(localTriFaceI);
+    //striSurfaceToAgglom.resize(localTriFaceI-1);
 
     triangles.shrink();
 
@@ -209,7 +218,7 @@ scalar calculateViewFactorFij
         return
         (
             (cosThetaI*cosThetaJ*dAjMag*dAiMag)
-            /(sqr(rMag)*constant::mathematical::pi)
+           /(sqr(rMag)*constant::mathematical::pi)
         );
     }
     else
@@ -264,6 +273,8 @@ int main(int argc, char *argv[])
        )
     );
 
+    const word viewFactorWall("viewFactorWall");
+
     const bool writeViewFactors =
         viewFactorDict.lookupOrDefault<bool>("writeViewFactorMatrix", false);
 
@@ -272,19 +283,6 @@ int main(int argc, char *argv[])
 
     const label debug = viewFactorDict.lookupOrDefault<label>("debug", 0);
 
-    volScalarField Qr
-    (
-        IOobject
-        (
-            "Qr",
-            runTime.timeName(),
-            mesh,
-            IOobject::MUST_READ,
-            IOobject::NO_WRITE
-        ),
-        mesh
-    );
-
     // Read agglomeration map
     labelListIOList finalAgglom
     (
@@ -336,27 +334,14 @@ int main(int argc, char *argv[])
     const polyBoundaryMesh& patches = mesh.boundaryMesh();
     const polyBoundaryMesh& coarsePatches = coarseMesh.boundaryMesh();
 
-    labelList viewFactorsPatches(patches.size());
-
-    const volScalarField::GeometricBoundaryField& Qrb = Qr.boundaryField();
-
-    label count = 0;
-    forAll(Qrb, patchI)
+    labelList viewFactorsPatches(patches.findIndices(viewFactorWall));
+    forAll (viewFactorsPatches, i)
     {
-        const polyPatch& pp = patches[patchI];
-        const fvPatchScalarField& QrpI = Qrb[patchI];
-
-        if ((isA<fixedValueFvPatchScalarField>(QrpI)) && (pp.size() > 0))
-        {
-            viewFactorsPatches[count] = QrpI.patch().index();
-            nCoarseFaces += coarsePatches[patchI].size();
-            nFineFaces += patches[patchI].size();
-            count ++;
-        }
+        label patchI = viewFactorsPatches[i];
+        nCoarseFaces += coarsePatches[patchI].size();
+        nFineFaces += patches[patchI].size();
     }
 
-    viewFactorsPatches.resize(count);
-
     // total number of coarse faces
     label totalNCoarseFaces = nCoarseFaces;
 
@@ -381,78 +366,85 @@ int main(int argc, char *argv[])
 
     DynamicList<label> localAgg(nCoarseFaces);
 
-    forAll (viewFactorsPatches, i)
+    labelHashSet includePatches;
+    forAll(viewFactorsPatches, i)
     {
         const label patchID = viewFactorsPatches[i];
 
         const polyPatch& pp = patches[patchID];
         const labelList& agglom = finalAgglom[patchID];
-        label nAgglom = max(agglom)+1;
-        labelListList coarseToFine(invertOneToMany(nAgglom, agglom));
-        const labelList& coarsePatchFace = coarseMesh.patchFaceMap()[patchID];
 
-        const pointField& coarseCf = coarseMesh.Cf().boundaryField()[patchID];
-        const pointField& coarseSf = coarseMesh.Sf().boundaryField()[patchID];
-
-        labelHashSet includePatches;
         includePatches.insert(patchID);
 
-        forAll(coarseCf, faceI)
+        if (agglom.size() > 0)
         {
-            point cf = coarseCf[faceI];
+            label nAgglom = max(agglom)+1;
+            labelListList coarseToFine(invertOneToMany(nAgglom, agglom));
+            const labelList& coarsePatchFace =
+                coarseMesh.patchFaceMap()[patchID];
 
-            const label coarseFaceI = coarsePatchFace[faceI];
-            const labelList& fineFaces = coarseToFine[coarseFaceI];
-            const label agglomI =
-                agglom[fineFaces[0]] + coarsePatches[patchID].start();
+            const pointField& coarseCf =
+                coarseMesh.Cf().boundaryField()[patchID];
+            const pointField& coarseSf =
+                coarseMesh.Sf().boundaryField()[patchID];
 
-            // Construct single face
-            uindirectPrimitivePatch upp
-            (
-                UIndirectList<face>(pp, fineFaces),
-                pp.points()
-            );
-
-
-            List<point> availablePoints
-            (
-                upp.faceCentres().size()
-              + upp.localPoints().size()
-            );
-
-            SubList<point>
-            (
-                availablePoints,
-                upp.faceCentres().size()
-            ).assign(upp.faceCentres());
-
-            SubList<point>
-            (
-                availablePoints,
-                upp.localPoints().size(),
-                upp.faceCentres().size()
-            ).assign(upp.localPoints());
-
-            point cfo = cf;
-            scalar dist = GREAT;
-            forAll(availablePoints, iPoint)
+            forAll(coarseCf, faceI)
             {
-                point cfFine = availablePoints[iPoint];
-                if (mag(cfFine-cfo) < dist)
-                {
-                    dist = mag(cfFine-cfo);
-                    cf = cfFine;
-                }
-            }
+                point cf = coarseCf[faceI];
 
-            point sf = coarseSf[faceI];
-            localCoarseCf.append(cf);
-            localCoarseSf.append(sf);
-            localAgg.append(agglomI);
+                const label coarseFaceI = coarsePatchFace[faceI];
+                const labelList& fineFaces = coarseToFine[coarseFaceI];
+                const label agglomI =
+                    agglom[fineFaces[0]] + coarsePatches[patchID].start();
+
+                // Construct single face
+                uindirectPrimitivePatch upp
+                (
+                    UIndirectList<face>(pp, fineFaces),
+                    pp.points()
+                );
+
+
+                List<point> availablePoints
+                (
+                    upp.faceCentres().size()
+                + upp.localPoints().size()
+                );
+
+                SubList<point>
+                (
+                    availablePoints,
+                    upp.faceCentres().size()
+                ).assign(upp.faceCentres());
+
+                SubList<point>
+                (
+                    availablePoints,
+                    upp.localPoints().size(),
+                    upp.faceCentres().size()
+                ).assign(upp.localPoints());
+
+                point cfo = cf;
+                scalar dist = GREAT;
+                forAll(availablePoints, iPoint)
+                {
+                    point cfFine = availablePoints[iPoint];
+                    if (mag(cfFine-cfo) < dist)
+                    {
+                        dist = mag(cfFine-cfo);
+                        cf = cfFine;
+                    }
+                }
+
+                point sf = coarseSf[faceI];
+                localCoarseCf.append(cf);
+                localCoarseSf.append(sf);
+                localAgg.append(agglomI);
+
+            }
         }
     }
 
-
     // Distribute local coarse Cf and Sf for shooting rays
     // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -478,7 +470,6 @@ int main(int argc, char *argv[])
     // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     #include "searchingEngine.H"
 
-
     // Determine rays between coarse face centres
     // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     DynamicList<label> rayStartFace(nCoarseFaces + 0.01*nCoarseFaces);
@@ -486,8 +477,8 @@ int main(int argc, char *argv[])
     DynamicList<label> rayEndFace(rayStartFace.size());
 
 
-    // Return rayStartFace in local index andrayEndFace in global index
-    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+    // Return rayStartFace in local index and rayEndFace in global index
+    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
     #include "shootRays.H"
 
@@ -508,7 +499,6 @@ int main(int argc, char *argv[])
         nViewFactors += nVisibleFaceFaces[faceI];
     }
 
-
     // - Construct compact numbering
     // - return map from remote to compact indices
     //   (per processor (!= myProcNo) a map from remote index to compact index)
@@ -519,54 +509,6 @@ int main(int argc, char *argv[])
 
     mapDistribute map(globalNumbering, rayEndFace, compactMap);
 
-    labelListIOList IOsubMap
-    (
-        IOobject
-        (
-            "subMap",
-            mesh.facesInstance(),
-            mesh,
-            IOobject::NO_READ,
-            IOobject::NO_WRITE,
-            false
-        ),
-        map.subMap()
-    );
-    IOsubMap.write();
-
-
-    labelListIOList IOconstructMap
-    (
-        IOobject
-        (
-            "constructMap",
-            mesh.facesInstance(),
-            mesh,
-            IOobject::NO_READ,
-            IOobject::NO_WRITE,
-            false
-        ),
-        map.constructMap()
-    );
-    IOconstructMap.write();
-
-
-    IOList<label> consMapDim
-    (
-        IOobject
-        (
-            "constructMapDim",
-            mesh.facesInstance(),
-            mesh,
-            IOobject::NO_READ,
-            IOobject::NO_WRITE,
-            false
-        ),
-        List<label>(1, map.constructSize())
-    );
-    consMapDim.write();
-
-
     // visibleFaceFaces has:
     //    (local face, local viewed face) = compact viewed face
     // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -600,33 +542,38 @@ int main(int argc, char *argv[])
     forAll(viewFactorsPatches, i)
     {
         label patchID = viewFactorsPatches[i];
+
         const labelList& agglom = finalAgglom[patchID];
-        label nAgglom = max(agglom)+1;
-        labelListList coarseToFine(invertOneToMany(nAgglom, agglom));
-        const labelList& coarsePatchFace = coarseMesh.patchFaceMap()[patchID];
-
-        forAll(coarseToFine, coarseI)
+        if (agglom.size() > 0)
         {
-            compactPatchId.append(patchID);
-            List<point>& fineCf = compactFineCf[compactI];
-            List<point>& fineSf = compactFineSf[compactI++];
+            label nAgglom = max(agglom)+1;
+            labelListList coarseToFine(invertOneToMany(nAgglom, agglom));
+            const labelList& coarsePatchFace =
+                coarseMesh.patchFaceMap()[patchID];
 
-            const label coarseFaceI = coarsePatchFace[coarseI];
-            const labelList& fineFaces = coarseToFine[coarseFaceI];
+            forAll(coarseToFine, coarseI)
+            {
+                compactPatchId.append(patchID);
+                List<point>& fineCf = compactFineCf[compactI];
+                List<point>& fineSf = compactFineSf[compactI++];
 
-            fineCf.setSize(fineFaces.size());
-            fineSf.setSize(fineFaces.size());
+                const label coarseFaceI = coarsePatchFace[coarseI];
+                const labelList& fineFaces = coarseToFine[coarseFaceI];
 
-            fineCf = UIndirectList<point>
-            (
-                mesh.Cf().boundaryField()[patchID],
-                coarseToFine[coarseFaceI]
-            );
-            fineSf = UIndirectList<point>
-            (
-                mesh.Sf().boundaryField()[patchID],
-                coarseToFine[coarseFaceI]
-            );
+                fineCf.setSize(fineFaces.size());
+                fineSf.setSize(fineFaces.size());
+
+                fineCf = UIndirectList<point>
+                (
+                    mesh.Cf().boundaryField()[patchID],
+                    coarseToFine[coarseFaceI]
+                );
+                fineSf = UIndirectList<point>
+                (
+                    mesh.Sf().boundaryField()[patchID],
+                    coarseToFine[coarseFaceI]
+                );
+            }
         }
     }
 
@@ -837,22 +784,25 @@ int main(int argc, char *argv[])
         {
             label patchID = viewFactorsPatches[i];
             const labelList& agglom = finalAgglom[patchID];
-            label nAgglom = max(agglom)+1;
-            labelListList coarseToFine(invertOneToMany(nAgglom, agglom));
-            const labelList& coarsePatchFace =
-                coarseMesh.patchFaceMap()[patchID];
-
-            forAll(coarseToFine, coarseI)
+            if (agglom.size() > 0)
             {
-                const scalar Fij = sum(F[compactI]);
-                const label coarseFaceID = coarsePatchFace[coarseI];
-                const labelList& fineFaces = coarseToFine[coarseFaceID];
-                forAll (fineFaces, fineId)
+                label nAgglom = max(agglom)+1;
+                labelListList coarseToFine(invertOneToMany(nAgglom, agglom));
+                const labelList& coarsePatchFace =
+                    coarseMesh.patchFaceMap()[patchID];
+
+                forAll(coarseToFine, coarseI)
                 {
-                    const label faceID = fineFaces[fineId];
-                    viewFactorField.boundaryField()[patchID][faceID] = Fij;
+                    const scalar Fij = sum(F[compactI]);
+                    const label coarseFaceID = coarsePatchFace[coarseI];
+                    const labelList& fineFaces = coarseToFine[coarseFaceID];
+                    forAll (fineFaces, fineId)
+                    {
+                        const label faceID = fineFaces[fineId];
+                        viewFactorField.boundaryField()[patchID][faceID] = Fij;
+                    }
+                    compactI++;
                 }
-                compactI++;
             }
         }
         viewFactorField.write();
@@ -886,66 +836,64 @@ int main(int argc, char *argv[])
     }
 
 
-    if (Pstream::master())
+    labelListList globalFaceFaces(visibleFaceFaces.size());
+
+    // Create globalFaceFaces needed to insert view factors
+    // in F to the global matrix Fmatrix
+    forAll(globalFaceFaces, faceI)
     {
-        scalarSquareMatrix Fmatrix(totalNCoarseFaces, totalNCoarseFaces, 0.0);
-
-        labelListList globalFaceFaces(visibleFaceFaces.size());
-
-        // Create globalFaceFaces needed to insert view factors
-        // in F to the global matrix Fmatrix
-        forAll(globalFaceFaces, faceI)
-        {
-            globalFaceFaces[faceI] = renumber
-            (
-                compactToGlobal,
-                visibleFaceFaces[faceI]
-            );
-        }
-
-        labelListIOList IOglobalFaceFaces
+        globalFaceFaces[faceI] = renumber
         (
-            IOobject
-            (
-                "globalFaceFaces",
-                mesh.facesInstance(),
-                mesh,
-                IOobject::NO_READ,
-                IOobject::NO_WRITE,
-                false
-            ),
-            globalFaceFaces
+            compactToGlobal,
+            visibleFaceFaces[faceI]
         );
-        IOglobalFaceFaces.write();
     }
-    else
-    {
-        labelListList globalFaceFaces(visibleFaceFaces.size());
-        forAll(globalFaceFaces, faceI)
-        {
-            globalFaceFaces[faceI] = renumber
-            (
-                compactToGlobal,
-                visibleFaceFaces[faceI]
-            );
-        }
 
-        labelListIOList IOglobalFaceFaces
+    labelListIOList IOglobalFaceFaces
+    (
+        IOobject
         (
-            IOobject
-            (
-                "globalFaceFaces",
-                mesh.facesInstance(),
-                mesh,
-                IOobject::NO_READ,
-                IOobject::NO_WRITE,
-                false
-            ),
-            globalFaceFaces
-        );
+            "globalFaceFaces",
+            mesh.facesInstance(),
+            mesh,
+            IOobject::NO_READ,
+            IOobject::NO_WRITE,
+            false
+        ),
+        globalFaceFaces
+    );
+    IOglobalFaceFaces.write();
 
-        IOglobalFaceFaces.write();
-    }
+
+    labelListIOList IOvisibleFaceFaces
+    (
+        IOobject
+        (
+            "visibleFaceFaces",
+            mesh.facesInstance(),
+            mesh,
+            IOobject::NO_READ,
+            IOobject::NO_WRITE,
+            false
+        ),
+        visibleFaceFaces
+    );
+    IOvisibleFaceFaces.write();
+
+    IOmapDistribute IOmapDist
+    (
+        IOobject
+        (
+            "mapDist",
+            mesh.facesInstance(),
+            mesh,
+            IOobject::NO_READ,
+            IOobject::AUTO_WRITE
+        ),
+        map.xfer()
+    );
+
+    IOmapDist.write();
 
     Info<< "End\n" << endl;
     return 0;
diff --git a/src/thermophysicalModels/radiation/Make/files b/src/thermophysicalModels/radiation/Make/files
index 5f520b2dcd..ef6e105719 100644
--- a/src/thermophysicalModels/radiation/Make/files
+++ b/src/thermophysicalModels/radiation/Make/files
@@ -9,6 +9,8 @@ radiationModels/fvDOM/blackBodyEmission/blackBodyEmission.C
 radiationModels/fvDOM/absorptionCoeffs/absorptionCoeffs.C
 radiationModels/viewFactor/viewFactor.C
 radiationModels/opaqueSolid/opaqueSolid.C
+radiationModels/solarLoad/solarLoad.C
+radiationModels/solarLoad/faceShading/faceShading.C
 
 /* Scatter model */
 submodels/scatterModel/scatterModel/scatterModel.C
@@ -25,6 +27,8 @@ submodels/absorptionEmissionModel/binaryAbsorptionEmission/binaryAbsorptionEmiss
 submodels/absorptionEmissionModel/greyMeanAbsorptionEmission/greyMeanAbsorptionEmission.C
 submodels/absorptionEmissionModel/wideBandAbsorptionEmission/wideBandAbsorptionEmission.C
 submodels/absorptionEmissionModel/greyMeanSolidAbsorptionEmission/greyMeanSolidAbsorptionEmission.C
+submodels/absorptionEmissionModel/multiBandSolidAbsorptionEmission/multiBandSolidAbsorptionEmission.C
+submodels/boundaryRadiationProperties/boundaryRadiationProperties.C
 
 /* Soot model */
 submodels/sootModel/sootModel/sootModel.C
@@ -32,12 +36,22 @@ submodels/sootModel/sootModel/sootModelNew.C
 submodels/sootModel/mixtureFractionSoot/mixtureFractionSoots.C
 submodels/sootModel/noSoot/noSoot.C
 
+/* Transmissivity model */
+submodels/transmissivityModel/transmissivityModel/transmissivityModel.C
+submodels/transmissivityModel/transmissivityModel/transmissivityModelNew.C
+submodels/transmissivityModel/noTransmissivity/noTransmissivity.C
+submodels/transmissivityModel/constantTransmissivity/constantTransmissivity.C
+submodels/transmissivityModel/multiBandSolidTransmissivity/multiBandSolidTransmissivity.C
+
+/* Solar calculator model */
+submodels/solarCalculator/solarCalculator.C
+
 /* Boundary conditions */
 derivedFvPatchFields/MarshakRadiation/MarshakRadiationFvPatchScalarField.C
 derivedFvPatchFields/MarshakRadiationFixedTemperature/MarshakRadiationFixedTemperatureFvPatchScalarField.C
 derivedFvPatchFields/greyDiffusiveRadiation/greyDiffusiveRadiationMixedFvPatchScalarField.C
 derivedFvPatchFields/wideBandDiffusiveRadiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.C
-derivedFvPatchFields/radiationCoupledBase/radiationCoupledBase.C
 derivedFvPatchFields/greyDiffusiveViewFactor/greyDiffusiveViewFactorFixedValueFvPatchScalarField.C
+derivedFvPatchFields/boundaryRadiationProperties/boundaryRadiationPropertiesFvPatchField.C
 
 LIB = $(FOAM_LIBBIN)/libradiationModels
diff --git a/src/thermophysicalModels/radiation/Make/options b/src/thermophysicalModels/radiation/Make/options
index 726b76e764..8b4db40a15 100644
--- a/src/thermophysicalModels/radiation/Make/options
+++ b/src/thermophysicalModels/radiation/Make/options
@@ -10,7 +10,9 @@ EXE_INC = \
     -I$(LIB_SRC)/thermophysicalModels/properties/solidMixtureProperties/lnInclude \
     -I$(LIB_SRC)/thermophysicalModels/reactionThermo/lnInclude \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
-    -I$(LIB_SRC)/meshTools/lnInclude
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/triSurface/lnInclude \
+    -I$(LIB_SRC)/parallel/distributed/lnInclude
 
 LIB_LIBS = \
     -lcompressibleTransportModels \
@@ -23,4 +25,6 @@ LIB_LIBS = \
     -lsolidProperties \
     -lliquidProperties \
     -lfiniteVolume \
-    -lmeshTools
+    -lmeshTools \
+    -ldistributed \
+    -ltriSurface
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationFvPatchScalarField.C b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationFvPatchScalarField.C
index dbe62c4a6d..935d2884b8 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationFvPatchScalarField.C
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationFvPatchScalarField.C
@@ -29,17 +29,18 @@ License
 #include "volFields.H"
 #include "radiationModel.H"
 #include "physicoChemicalConstants.H"
+#include "boundaryRadiationProperties.H"
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-Foam::MarshakRadiationFvPatchScalarField::MarshakRadiationFvPatchScalarField
+Foam::radiation::MarshakRadiationFvPatchScalarField::
+MarshakRadiationFvPatchScalarField
 (
     const fvPatch& p,
     const DimensionedField<scalar, volMesh>& iF
 )
 :
     mixedFvPatchScalarField(p, iF),
-    radiationCoupledBase(p, "undefined", scalarField::null()),
     TName_("T")
 {
     refValue() = 0.0;
@@ -48,7 +49,8 @@ Foam::MarshakRadiationFvPatchScalarField::MarshakRadiationFvPatchScalarField
 }
 
 
-Foam::MarshakRadiationFvPatchScalarField::MarshakRadiationFvPatchScalarField
+Foam::radiation::MarshakRadiationFvPatchScalarField::
+MarshakRadiationFvPatchScalarField
 (
     const MarshakRadiationFvPatchScalarField& ptf,
     const fvPatch& p,
@@ -57,18 +59,12 @@ Foam::MarshakRadiationFvPatchScalarField::MarshakRadiationFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(ptf, p, iF, mapper),
-    radiationCoupledBase
-    (
-        p,
-        ptf.emissivityMethod(),
-        ptf.emissivity_,
-        mapper
-    ),
     TName_(ptf.TName_)
 {}
 
 
-Foam::MarshakRadiationFvPatchScalarField::MarshakRadiationFvPatchScalarField
+Foam::radiation::MarshakRadiationFvPatchScalarField::
+MarshakRadiationFvPatchScalarField
 (
     const fvPatch& p,
     const DimensionedField<scalar, volMesh>& iF,
@@ -76,7 +72,6 @@ Foam::MarshakRadiationFvPatchScalarField::MarshakRadiationFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(p, iF),
-    radiationCoupledBase(p, dict),
     TName_(dict.lookupOrDefault<word>("T", "T"))
 {
     if (dict.found("value"))
@@ -97,63 +92,51 @@ Foam::MarshakRadiationFvPatchScalarField::MarshakRadiationFvPatchScalarField
 }
 
 
-Foam::MarshakRadiationFvPatchScalarField::MarshakRadiationFvPatchScalarField
+Foam::radiation::MarshakRadiationFvPatchScalarField::
+MarshakRadiationFvPatchScalarField
 (
     const MarshakRadiationFvPatchScalarField& ptf
 )
 :
     mixedFvPatchScalarField(ptf),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
     TName_(ptf.TName_)
 {}
 
 
-Foam::MarshakRadiationFvPatchScalarField::MarshakRadiationFvPatchScalarField
+Foam::radiation::MarshakRadiationFvPatchScalarField::
+MarshakRadiationFvPatchScalarField
 (
     const MarshakRadiationFvPatchScalarField& ptf,
     const DimensionedField<scalar, volMesh>& iF
 )
 :
     mixedFvPatchScalarField(ptf, iF),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
     TName_(ptf.TName_)
 {}
 
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-void Foam::MarshakRadiationFvPatchScalarField::autoMap
+void Foam::radiation::MarshakRadiationFvPatchScalarField::autoMap
 (
     const fvPatchFieldMapper& m
 )
 {
-    mixedFvPatchScalarField::autoMap(m);
-    radiationCoupledBase::autoMap(m);
+    scalarField::autoMap(m);
 }
 
 
-void Foam::MarshakRadiationFvPatchScalarField::rmap
+void Foam::radiation::MarshakRadiationFvPatchScalarField::rmap
 (
     const fvPatchScalarField& ptf,
     const labelList& addr
 )
 {
     mixedFvPatchScalarField::rmap(ptf, addr);
-    radiationCoupledBase::rmap(ptf, addr);
 }
 
 
-void Foam::MarshakRadiationFvPatchScalarField::updateCoeffs()
+void Foam::radiation::MarshakRadiationFvPatchScalarField::updateCoeffs()
 {
     if (this->updated())
     {
@@ -176,9 +159,17 @@ void Foam::MarshakRadiationFvPatchScalarField::updateCoeffs()
     const scalarField& gamma =
         patch().lookupPatchField<volScalarField, scalar>("gammaRad");
 
-    const scalarField temissivity = emissivity();
+    const boundaryRadiationProperties& boundaryRadiation =
+        boundaryRadiationProperties::New(dimensionedInternalField().mesh());
 
-    const scalarField Ep(temissivity/(2.0*(2.0 - temissivity)));
+    const tmp<scalarField> temissivity
+    (
+        boundaryRadiation.emissivity(patch().index())
+    );
+
+    const scalarField& emissivity = temissivity();
+
+    const scalarField Ep(emissivity/(2.0*(scalar(2.0) - emissivity)));
 
     // Set value fraction
     valueFraction() = 1.0/(1.0 + gamma*patch().deltaCoeffs()/Ep);
@@ -190,10 +181,12 @@ void Foam::MarshakRadiationFvPatchScalarField::updateCoeffs()
 }
 
 
-void Foam::MarshakRadiationFvPatchScalarField::write(Ostream& os) const
+void Foam::radiation::MarshakRadiationFvPatchScalarField::write
+(
+    Ostream& os
+) const
 {
     mixedFvPatchScalarField::write(os);
-    radiationCoupledBase::write(os);
     writeEntryIfDifferent<word>(os, "T", "T", TName_);
 }
 
@@ -201,6 +194,8 @@ void Foam::MarshakRadiationFvPatchScalarField::write(Ostream& os) const
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 namespace Foam
+{
+namespace radiation
 {
     makePatchTypeField
     (
@@ -208,6 +203,6 @@ namespace Foam
         MarshakRadiationFvPatchScalarField
     );
 }
-
+}
 
 // ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationFvPatchScalarField.H b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationFvPatchScalarField.H
index a43a295fcd..9a6f9a8f6b 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationFvPatchScalarField.H
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationFvPatchScalarField.H
@@ -64,12 +64,13 @@ SourceFiles
 #define MarshakRadiationMixedFvPatchField_H
 
 #include "mixedFvPatchFields.H"
-#include "radiationCoupledBase.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 namespace Foam
 {
+namespace radiation
+{
 
 /*---------------------------------------------------------------------------*\
              Class MarshakRadiationFvPatchScalarField Declaration
@@ -77,8 +78,7 @@ namespace Foam
 
 class MarshakRadiationFvPatchScalarField
 :
-    public mixedFvPatchScalarField,
-    public radiationCoupledBase
+    public mixedFvPatchScalarField
 {
 
     // Private data
@@ -204,6 +204,7 @@ public:
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
+} // End namespace radiation
 } // End namespace Foam
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedTemperature/MarshakRadiationFixedTemperatureFvPatchScalarField.C b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedTemperature/MarshakRadiationFixedTemperatureFvPatchScalarField.C
index b55812ace1..99e61bc524 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedTemperature/MarshakRadiationFixedTemperatureFvPatchScalarField.C
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedTemperature/MarshakRadiationFixedTemperatureFvPatchScalarField.C
@@ -29,10 +29,11 @@ License
 #include "volFields.H"
 #include "radiationModel.H"
 #include "physicoChemicalConstants.H"
+#include "boundaryRadiationProperties.H"
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::
+Foam::radiation::MarshakRadiationFixedTemperatureFvPatchScalarField::
 MarshakRadiationFixedTemperatureFvPatchScalarField
 (
     const fvPatch& p,
@@ -40,7 +41,6 @@ MarshakRadiationFixedTemperatureFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(p, iF),
-    radiationCoupledBase(p, "undefined", scalarField::null()),
     Trad_(p.size())
 {
     refValue() = 0.0;
@@ -49,7 +49,7 @@ MarshakRadiationFixedTemperatureFvPatchScalarField
 }
 
 
-Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::
+Foam::radiation::MarshakRadiationFixedTemperatureFvPatchScalarField::
 MarshakRadiationFixedTemperatureFvPatchScalarField
 (
     const MarshakRadiationFixedTemperatureFvPatchScalarField& ptf,
@@ -59,18 +59,11 @@ MarshakRadiationFixedTemperatureFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(ptf, p, iF, mapper),
-    radiationCoupledBase
-    (
-        p,
-        ptf.emissivityMethod(),
-        ptf.emissivity_,
-        mapper
-    ),
     Trad_(ptf.Trad_, mapper)
 {}
 
 
-Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::
+Foam::radiation::MarshakRadiationFixedTemperatureFvPatchScalarField::
 MarshakRadiationFixedTemperatureFvPatchScalarField
 (
     const fvPatch& p,
@@ -79,7 +72,6 @@ MarshakRadiationFixedTemperatureFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(p, iF),
-    radiationCoupledBase(p, dict),
     Trad_("Trad", dict, p.size())
 {
     // refValue updated on each call to updateCoeffs()
@@ -94,24 +86,18 @@ MarshakRadiationFixedTemperatureFvPatchScalarField
 }
 
 
-Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::
+Foam::radiation::MarshakRadiationFixedTemperatureFvPatchScalarField::
 MarshakRadiationFixedTemperatureFvPatchScalarField
 (
     const MarshakRadiationFixedTemperatureFvPatchScalarField& ptf
 )
 :
     mixedFvPatchScalarField(ptf),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
     Trad_(ptf.Trad_)
 {}
 
 
-Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::
+Foam::radiation::MarshakRadiationFixedTemperatureFvPatchScalarField::
 MarshakRadiationFixedTemperatureFvPatchScalarField
 (
     const MarshakRadiationFixedTemperatureFvPatchScalarField& ptf,
@@ -119,37 +105,31 @@ MarshakRadiationFixedTemperatureFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(ptf, iF),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
     Trad_(ptf.Trad_)
 {}
 
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-void Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::autoMap
+void Foam::radiation::MarshakRadiationFixedTemperatureFvPatchScalarField::
+autoMap
 (
     const fvPatchFieldMapper& m
 )
 {
     mixedFvPatchScalarField::autoMap(m);
-    radiationCoupledBase::autoMap(m);
     Trad_.autoMap(m);
 }
 
 
-void Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::rmap
+void Foam::radiation::MarshakRadiationFixedTemperatureFvPatchScalarField::rmap
 (
     const fvPatchScalarField& ptf,
     const labelList& addr
 )
 {
     mixedFvPatchScalarField::rmap(ptf, addr);
-    radiationCoupledBase::rmap(ptf, addr);
+
     const MarshakRadiationFixedTemperatureFvPatchScalarField& mrptf =
         refCast<const MarshakRadiationFixedTemperatureFvPatchScalarField>(ptf);
 
@@ -157,7 +137,8 @@ void Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::rmap
 }
 
 
-void Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::updateCoeffs()
+void Foam::radiation::MarshakRadiationFixedTemperatureFvPatchScalarField::
+updateCoeffs()
 {
     if (this->updated())
     {
@@ -176,9 +157,18 @@ void Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::updateCoeffs()
     const scalarField& gamma =
         patch().lookupPatchField<volScalarField, scalar>("gammaRad");
 
-    const scalarField temissivity = emissivity();
+    //const scalarField temissivity = emissivity();
+    const boundaryRadiationProperties& boundaryRadiation =
+        boundaryRadiationProperties::New(dimensionedInternalField().mesh());
 
-    const scalarField Ep(temissivity/(2.0*(scalar(2.0) - temissivity)));
+    const tmp<scalarField> temissivity
+    (
+        boundaryRadiation.emissivity(patch().index())
+    );
+
+    const scalarField& emissivity = temissivity();
+
+    const scalarField Ep(emissivity/(2.0*(scalar(2.0) - emissivity)));
 
     // Set value fraction
     valueFraction() = 1.0/(1.0 + gamma*patch().deltaCoeffs()/Ep);
@@ -190,13 +180,12 @@ void Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::updateCoeffs()
 }
 
 
-void Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::write
+void Foam::radiation::MarshakRadiationFixedTemperatureFvPatchScalarField::write
 (
     Ostream& os
 ) const
 {
     mixedFvPatchScalarField::write(os);
-    radiationCoupledBase::write(os);
     Trad_.writeEntry("Trad", os);
 }
 
@@ -204,6 +193,8 @@ void Foam::MarshakRadiationFixedTemperatureFvPatchScalarField::write
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 namespace Foam
+{
+namespace radiation
 {
     makePatchTypeField
     (
@@ -211,6 +202,6 @@ namespace Foam
         MarshakRadiationFixedTemperatureFvPatchScalarField
     );
 }
-
+}
 
 // ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedTemperature/MarshakRadiationFixedTemperatureFvPatchScalarField.H b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedTemperature/MarshakRadiationFixedTemperatureFvPatchScalarField.H
index c224f035ba..57f7cbcc22 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedTemperature/MarshakRadiationFixedTemperatureFvPatchScalarField.H
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedTemperature/MarshakRadiationFixedTemperatureFvPatchScalarField.H
@@ -64,21 +64,21 @@ SourceFiles
 #define MarshakRadiationFixedTemperatureFvPatchScalarField_H
 
 #include "mixedFvPatchFields.H"
-#include "radiationCoupledBase.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 namespace Foam
 {
-
+namespace radiation
+{
 /*---------------------------------------------------------------------------*\
      Class MarshakRadiationFixedTemperatureFvPatchScalarField Declaration
 \*---------------------------------------------------------------------------*/
 
 class MarshakRadiationFixedTemperatureFvPatchScalarField
 :
-    public mixedFvPatchScalarField,
-    public radiationCoupledBase
+    public mixedFvPatchScalarField
+    //public radiationCoupledBase
 {
 
     // Private data
@@ -208,6 +208,7 @@ public:
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
+} // End namespace radiation
 } // End namespace Foam
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/boundaryRadiationProperties/boundaryRadiationPropertiesFvPatchField.C b/src/thermophysicalModels/radiation/derivedFvPatchFields/boundaryRadiationProperties/boundaryRadiationPropertiesFvPatchField.C
new file mode 100644
index 0000000000..2363f4ea43
--- /dev/null
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/boundaryRadiationProperties/boundaryRadiationPropertiesFvPatchField.C
@@ -0,0 +1,570 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "boundaryRadiationPropertiesFvPatchField.H"
+#include "volFields.H"
+#include "mappedPatchBase.H"
+#include "fvPatchFieldMapper.H"
+#include "radiationModel.H"
+#include "absorptionEmissionModel.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * Static Member Data  * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    template<>
+    const char* Foam::NamedEnum
+    <
+        Foam::radiation::boundaryRadiationPropertiesFvPatchField::methodType,
+        3
+    >::names[] =
+    {
+        "solidRadiation",
+        "lookup",
+        "model"
+    };
+}
+
+const Foam::NamedEnum
+<
+    Foam::radiation::boundaryRadiationPropertiesFvPatchField::methodType,
+    3
+> Foam::radiation::boundaryRadiationPropertiesFvPatchField::methodTypeNames_;
+
+
+// * * * * * * * * * * * * * * * * Private functions * * * * * * * * * * * * //
+
+Foam::label
+Foam::radiation::boundaryRadiationPropertiesFvPatchField::nbrPatchIndex() const
+{
+    // Get the coupling information from the mappedPatchBase
+    const mappedPatchBase& mpp =
+        refCast<const mappedPatchBase>(patch().patch());
+
+    return (mpp.samplePolyPatch().index());
+}
+
+
+const Foam::fvMesh&
+Foam::radiation::boundaryRadiationPropertiesFvPatchField::nbrRegion() const
+{
+    const mappedPatchBase& mpp =
+        refCast<const mappedPatchBase>(patch().patch());
+
+     return (refCast<const fvMesh>(mpp.sampleMesh()));
+}
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+
+Foam::radiation::boundaryRadiationPropertiesFvPatchField::
+boundaryRadiationPropertiesFvPatchField
+(
+    const fvPatch& p,
+    const DimensionedField<scalar, volMesh>& iF
+)
+:
+    calculatedFvPatchScalarField(p, iF),
+    method_(LOOKUP),
+    dict_(),
+    absorptionEmission_(NULL),
+    transmissivity_(NULL)
+{}
+
+
+Foam::radiation::boundaryRadiationPropertiesFvPatchField::
+boundaryRadiationPropertiesFvPatchField
+(
+    const fvPatch& p,
+    const DimensionedField<scalar, volMesh>& iF,
+    const dictionary& dict
+)
+:
+    calculatedFvPatchScalarField(p, iF),
+    method_(methodTypeNames_.read(dict.lookup("mode"))),
+    dict_(dict),
+    absorptionEmission_(NULL),
+    transmissivity_(NULL)
+{
+    switch (method_)
+    {
+        case SOLIDRADIATION:
+        {
+            if (!isA<mappedPatchBase>(p.patch()))
+            {
+                FatalIOErrorIn
+                (
+                    "boundaryRadiationPropertiesFvPatchField:"
+                    ":boundaryRadiationPropertiesFvPatchField\n"
+                    "(\n"
+                    "    const fvPatch& p,\n"
+                    "    const dictionary& dict\n"
+                    ")\n",
+                    dict
+                )   << "\n    patch type '" << p.type()
+                    << "' not type '" << mappedPatchBase::typeName << "'"
+                    << "\n    for patch " << p.name()
+                    << exit(FatalIOError);
+            }
+        }
+        break;
+
+        case MODEL:
+        {
+            const fvMesh& mesh = this->dimensionedInternalField().mesh();
+
+            //if (dict.found("absorptionEmissionModel"))
+            {
+                absorptionEmission_.reset
+                (
+                    absorptionEmissionModel::New(dict, mesh).ptr()
+                );
+            }
+
+           // if (dict.found("transmissivityModel"))
+            {
+                transmissivity_.reset
+                (
+                    transmissivityModel::New(dict, mesh).ptr()
+                );
+            }
+        }
+        case LOOKUP:
+        {
+            //Do nothing
+        }
+        break;
+    }
+
+    if (dict.found("value"))
+    {
+        fvPatchScalarField::operator=
+        (
+            scalarField("value", dict, p.size())
+        );
+
+    }
+    else
+    {
+         fvPatchScalarField::operator=(0.0);
+    }
+}
+
+
+Foam::radiation::boundaryRadiationPropertiesFvPatchField::
+boundaryRadiationPropertiesFvPatchField
+(
+    const boundaryRadiationPropertiesFvPatchField& ptf,
+    const fvPatch& p,
+    const DimensionedField<scalar, volMesh>& iF,
+    const fvPatchFieldMapper& mapper
+)
+:
+    calculatedFvPatchScalarField(ptf, p, iF, mapper),
+    method_(ptf.method_),
+    dict_(ptf.dict_),
+    absorptionEmission_(NULL),
+    transmissivity_(NULL)
+{}
+
+
+Foam::radiation::boundaryRadiationPropertiesFvPatchField::
+boundaryRadiationPropertiesFvPatchField
+(
+    const boundaryRadiationPropertiesFvPatchField& ptf
+)
+:
+    calculatedFvPatchScalarField(ptf),
+    method_(ptf.method_),
+    dict_(ptf.dict_),
+    absorptionEmission_(NULL),
+    transmissivity_(NULL)
+{}
+
+
+Foam::radiation::boundaryRadiationPropertiesFvPatchField::
+boundaryRadiationPropertiesFvPatchField
+(
+    const boundaryRadiationPropertiesFvPatchField& ptf,
+    const DimensionedField<scalar, volMesh>& iF
+)
+:
+    calculatedFvPatchScalarField(ptf, iF),
+    method_(ptf.method_),
+    dict_(ptf.dict_),
+    absorptionEmission_(NULL),
+    transmissivity_(NULL)
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+const Foam::radiation::absorptionEmissionModel&
+Foam::radiation::boundaryRadiationPropertiesFvPatchField::
+absorptionEmission() const
+{
+    return absorptionEmission_();
+}
+
+
+const Foam::radiation::transmissivityModel&
+Foam::radiation::boundaryRadiationPropertiesFvPatchField::
+transmissiveModel() const
+{
+    return transmissivity_();
+}
+
+
+Foam::tmp<Foam::scalarField> Foam::radiation::
+boundaryRadiationPropertiesFvPatchField::
+emissivity(const label bandI) const
+{
+    switch (method_)
+    {
+        case SOLIDRADIATION:
+        {
+            const fvMesh& nbrMesh = nbrRegion();
+
+            const radiation::radiationModel& radiation =
+                nbrMesh.lookupObject<radiation::radiationModel>
+                (
+                    "radiationProperties"
+                );
+
+            scalarField emissivity
+            (
+                radiation.absorptionEmission().e(bandI)().boundaryField()
+                [
+                    nbrPatchIndex()
+                ]
+            );
+
+            const mappedPatchBase& mpp =
+                refCast<const mappedPatchBase>(patch().patch());
+
+            mpp.distribute(emissivity);
+
+            const tmp<scalarField> te(new scalarField(emissivity));
+
+            return te;
+
+        }
+        break;
+
+        case LOOKUP:
+        {
+            tmp<scalarField> e
+            (
+                 new scalarField("emissivity", dict_, patch().size())
+            );
+
+            return e;
+        }
+
+        case MODEL:
+        {
+            const label index = patch().index();
+
+            tmp<scalarField> e
+            (
+                 new scalarField
+                 (
+                     absorptionEmission_->e(bandI)().boundaryField()[index]
+                 )
+            );
+
+            return e;
+        }
+
+        default:
+        {
+            FatalErrorIn
+            (
+                "boundaryRadiationPropertiesFvPatchField::"
+                "emissivity(const scalarField&)"
+            )   << "Unimplemented method " << method_ << endl
+                << "Please set 'mode' to one of "
+                << methodTypeNames_.toc()
+                << exit(FatalError);
+        }
+        break;
+    }
+
+    return scalarField(0);
+}
+
+
+Foam::tmp<Foam::scalarField> Foam::radiation::
+boundaryRadiationPropertiesFvPatchField::absorptivity
+(
+    const label bandI
+) const
+{
+    switch (method_)
+    {
+        case SOLIDRADIATION:
+        {
+            const fvMesh& nbrMesh = nbrRegion();
+
+            const radiation::radiationModel& radiation =
+                nbrMesh.lookupObject<radiation::radiationModel>
+                (
+                    "radiationProperties"
+                );
+
+            scalarField absorp
+            (
+                radiation.absorptionEmission().a(bandI)().boundaryField()
+                [
+                    nbrPatchIndex()
+                ]
+            );
+
+            const mappedPatchBase& mpp =
+                refCast<const mappedPatchBase>(patch().patch());
+
+            mpp.distribute(absorp);
+
+            const tmp<scalarField> ta(new scalarField(absorp));
+
+            return ta;
+
+        }
+        break;
+
+        case MODEL:
+        {
+            const label index = patch().index();
+            tmp<scalarField> a
+            (
+                 new scalarField
+                 (
+                     absorptionEmission_->a(bandI)().boundaryField()[index]
+                 )
+            );
+            return a;
+        }
+
+        case LOOKUP:
+        {
+            tmp<scalarField> a
+            (
+                 new scalarField("absorptivity", dict_, patch().size())
+            );
+
+            return a;
+        }
+
+        default:
+        {
+            FatalErrorIn
+            (
+                "boundaryRadiationPropertiesFvPatchField::"
+                "absorptivity(const scalarField&)"
+            )   << "Unimplemented method " << method_ << endl
+                << "Please set 'mode' to one of "
+                << methodTypeNames_.toc()
+                << exit(FatalError);
+        }
+        break;
+    }
+
+    return scalarField(0);
+}
+
+
+Foam::tmp<Foam::scalarField> Foam::radiation::
+boundaryRadiationPropertiesFvPatchField::
+transmissivity(const label bandI) const
+{
+    switch (method_)
+    {
+        case SOLIDRADIATION:
+        {
+            const fvMesh& nbrMesh = nbrRegion();
+
+            const radiation::radiationModel& radiation =
+                nbrMesh.lookupObject<radiation::radiationModel>
+                (
+                    "radiationProperties"
+                );
+
+            scalarField trans
+            (
+                radiation.transmissivity().tauEff(bandI)().boundaryField()
+                [
+                     nbrPatchIndex()
+                ]
+            );
+
+            const mappedPatchBase& mpp =
+                refCast<const mappedPatchBase>(patch().patch());
+
+            mpp.distribute(trans);
+
+            const tmp<scalarField> tt(new scalarField(trans));
+
+            return tt;
+
+        }
+        break;
+
+        case MODEL:
+        {
+            const label index = patch().index();
+            tmp<scalarField> tau
+            (
+                 new scalarField
+                 (
+                     transmissivity_->tauEff(bandI)().boundaryField()[index]
+                 )
+            );
+            return tau;
+        }
+
+        case LOOKUP:
+        {
+            tmp<scalarField> tau
+            (
+                new scalarField
+                (
+                    "transmissivity", dict_, patch().size()
+                )
+            );
+            return tau;
+        }
+
+        default:
+        {
+            FatalErrorIn
+            (
+                "boundaryRadiationPropertiesFvPatchField::"
+                "transmissivity(const scalarField&)"
+            )   << "Unimplemented method " << method_ << endl
+                << "Please set 'mode' to one of "
+                << methodTypeNames_.toc()
+                << exit(FatalError);
+        }
+        break;
+    }
+
+    return scalarField(0);
+}
+
+
+
+Foam::tmp<Foam::scalarField> Foam::radiation::
+boundaryRadiationPropertiesFvPatchField::
+reflectivity(const label bandI) const
+{
+    const tmp<scalarField> tt = transmissivity(bandI);
+    const tmp<scalarField> ta = absorptivity(bandI);
+
+    return (1.0 - tt - ta);
+}
+
+
+void Foam::radiation::boundaryRadiationPropertiesFvPatchField::
+write(Ostream& os) const
+{
+    calculatedFvPatchScalarField::write(os);
+
+    os.writeKeyword("mode") << methodTypeNames_[method_]
+        << token::END_STATEMENT << nl;
+
+     switch (method_)
+     {
+        case MODEL:
+        {
+            word modelType
+            (
+                word(dict_.lookup("absorptionEmissionModel"))
+            );
+
+            os.writeKeyword("absorptionEmissionModel") << modelType
+                << token::END_STATEMENT << nl;
+
+            word modelCoeffs(modelType + word("Coeffs"));
+            os.writeKeyword(modelCoeffs);
+
+            dict_.subDict(modelCoeffs).write(os);
+
+            modelType = word(dict_.lookup("transmissivityModel"));
+
+            os.writeKeyword("transmissivityModel") << modelType
+                << token::END_STATEMENT << nl;
+
+            modelCoeffs = modelType + word("Coeffs");
+
+            os.writeKeyword(modelCoeffs);
+
+            dict_.subDict(modelCoeffs).write(os);
+
+            break;
+        }
+
+        case LOOKUP:
+        {
+            const scalarField emissivity("emissivity", dict_, patch().size());
+            emissivity.writeEntry("emissivity", os);
+
+            const scalarField absorptivity
+            (
+                "absorptivity", dict_, patch().size()
+            );
+            absorptivity.writeEntry("absorptivity", os);
+
+            const scalarField transmissivity
+            (
+                "transmissivity", dict_, patch().size()
+            );
+            transmissivity.writeEntry("transmissivity", os);
+
+            break;
+        }
+
+        case SOLIDRADIATION:
+        {
+        }
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace radiation
+{
+    makePatchTypeField
+    (
+        fvPatchScalarField,
+        boundaryRadiationPropertiesFvPatchField
+    );
+}
+}
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/boundaryRadiationProperties/boundaryRadiationPropertiesFvPatchField.H b/src/thermophysicalModels/radiation/derivedFvPatchFields/boundaryRadiationProperties/boundaryRadiationPropertiesFvPatchField.H
new file mode 100644
index 0000000000..e6cf0ac502
--- /dev/null
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/boundaryRadiationProperties/boundaryRadiationPropertiesFvPatchField.H
@@ -0,0 +1,212 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::boundaryRadiationPropertiesFvPatchField
+
+Description
+    Common functions to emissivity. It gets supplied from lookup into a
+    dictionary or calculated by the solidThermo:
+
+    - 'lookup' : lookup volScalarField with name
+    - 'solidThermo' : use solidThermo
+    - 'model' : use a model
+
+SourceFiles
+    boundaryRadiationPropertiesFvPatchField.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef boundaryRadiationPropertiesFvPatchField_H
+#define boundaryRadiationPropertiesFvPatchField_H
+
+#include "scalarField.H"
+#include "NamedEnum.H"
+#include "fvPatch.H"
+#include "calculatedFvPatchFields.H"
+#include "transmissivityModel.H"
+#include "absorptionEmissionModel.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace radiation
+{
+/*---------------------------------------------------------------------------*\
+             Class boundaryRadiationPropertiesFvPatchField Declaration
+\*---------------------------------------------------------------------------*/
+
+class boundaryRadiationPropertiesFvPatchField
+:
+    public calculatedFvPatchScalarField
+{
+public:
+
+    // - Type of look up
+    enum methodType
+    {
+        SOLIDRADIATION,
+        LOOKUP,
+        MODEL
+    };
+
+
+private:
+
+    // Private data
+
+        static const NamedEnum<methodType, 3> methodTypeNames_;
+
+        //- How to get property
+        const methodType method_;
+
+        //- Dictionary
+        const dictionary dict_;
+
+        //- Absorption/emission model
+        autoPtr<absorptionEmissionModel> absorptionEmission_;
+
+        //- transmissivity model
+        autoPtr<transmissivityModel> transmissivity_;
+
+
+    // Private functions
+
+        //- Return nbr patch index
+        label nbrPatchIndex() const;
+
+        //- Return nbr mesh
+        const fvMesh& nbrRegion() const;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("boundaryRadiation");
+
+    // Constructors
+
+
+        //- Construct from patch and internal field
+        boundaryRadiationPropertiesFvPatchField
+        (
+            const fvPatch&,
+            const DimensionedField<scalar, volMesh>&
+        );
+
+        //- Construct from patch, internal field and dictionary
+        boundaryRadiationPropertiesFvPatchField
+        (
+            const fvPatch&,
+            const DimensionedField<scalar, volMesh>&,
+            const dictionary&
+        );
+
+        //- Construct by mapping given a
+        // greyDiffusiveViewFactorFixedValueFvPatchScalarField onto a new patch
+        boundaryRadiationPropertiesFvPatchField
+        (
+            const boundaryRadiationPropertiesFvPatchField&,
+            const fvPatch&,
+            const DimensionedField<scalar, volMesh>&,
+            const fvPatchFieldMapper&
+        );
+
+        //- Construct as copy
+        boundaryRadiationPropertiesFvPatchField
+        (
+            const boundaryRadiationPropertiesFvPatchField&
+        );
+
+        //- Construct as copy setting internal field reference
+        boundaryRadiationPropertiesFvPatchField
+        (
+            const boundaryRadiationPropertiesFvPatchField&,
+            const DimensionedField<scalar, volMesh>&
+        );
+
+        //- Construct and return a clone
+        virtual tmp<fvPatchScalarField> clone() const
+        {
+            return tmp<fvPatchScalarField>
+            (
+                new boundaryRadiationPropertiesFvPatchField(*this)
+            );
+        }
+
+        //- Construct and return a clone setting internal field reference
+        virtual tmp<fvPatchScalarField> clone
+        (
+            const DimensionedField<scalar, volMesh>& iF
+        ) const
+        {
+            return tmp<fvPatchScalarField>
+            (
+                new boundaryRadiationPropertiesFvPatchField(*this, iF)
+            );
+        }
+
+
+    // Member functions
+
+        //- Method to obtain properties
+        word method() const
+        {
+            return methodTypeNames_[method_];
+        }
+
+
+        //- Return absorptionEmissionModel
+        const absorptionEmissionModel& absorptionEmission() const;
+
+        //- Return transmissivityModel
+        const transmissivityModel& transmissiveModel() const;
+
+        //- Calculate corresponding emissivity field for bandI
+        tmp<scalarField> emissivity(const label bandI = 0) const;
+
+        //- Calculate corresponding absorptivity field for bandI
+        tmp<scalarField> absorptivity(const label bandI = 0) const;
+
+        //- Calculate corresponding transmissivity field for bandI
+        tmp<scalarField> transmissivity(const label bandI = 0) const;
+
+        //- Calculate corresponding reflectivity field
+        tmp<scalarField> reflectivity(const label bandI = 0) const;
+
+        //- Write
+        virtual void write(Ostream&) const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+} // End namespace radiation
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveRadiation/greyDiffusiveRadiationMixedFvPatchScalarField.C b/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveRadiation/greyDiffusiveRadiationMixedFvPatchScalarField.C
index cafab541ac..c7f01ae723 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveRadiation/greyDiffusiveRadiationMixedFvPatchScalarField.C
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveRadiation/greyDiffusiveRadiationMixedFvPatchScalarField.C
@@ -27,6 +27,7 @@ License
 #include "addToRunTimeSelectionTable.H"
 #include "fvPatchFieldMapper.H"
 #include "volFields.H"
+#include "boundaryRadiationProperties.H"
 
 #include "fvDOM.H"
 #include "constants.H"
@@ -44,8 +45,8 @@ greyDiffusiveRadiationMixedFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(p, iF),
-    radiationCoupledBase(p, "undefined", scalarField::null()),
-    TName_("T")
+    TName_("T"),
+    solarLoad_(false)
 {
     refValue() = 0.0;
     refGrad() = 0.0;
@@ -63,13 +64,8 @@ greyDiffusiveRadiationMixedFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(ptf, p, iF, mapper),
-    radiationCoupledBase
-    (
-        p,
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
-    TName_(ptf.TName_)
+    TName_(ptf.TName_),
+    solarLoad_(ptf.solarLoad_)
 {}
 
 
@@ -82,8 +78,8 @@ greyDiffusiveRadiationMixedFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(p, iF),
-    radiationCoupledBase(p, dict),
-    TName_(dict.lookupOrDefault<word>("T", "T"))
+    TName_(dict.lookupOrDefault<word>("T", "T")),
+    solarLoad_(dict.lookupOrDefault<bool>("solarLoad", false))
 {
     if (dict.found("refValue"))
     {
@@ -113,13 +109,8 @@ greyDiffusiveRadiationMixedFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(ptf),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
-    TName_(ptf.TName_)
+    TName_(ptf.TName_),
+    solarLoad_(ptf.solarLoad_)
 {}
 
 
@@ -131,13 +122,8 @@ greyDiffusiveRadiationMixedFvPatchScalarField
 )
 :
     mixedFvPatchScalarField(ptf, iF),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
-    TName_(ptf.TName_)
+    TName_(ptf.TName_),
+    solarLoad_(ptf.solarLoad_)
 {}
 
 
@@ -181,6 +167,7 @@ updateCoeffs()
     }
 
     scalarField& Iw = *this;
+
     const vectorField n(patch().nf());
 
     radiativeIntensityRay& ray =
@@ -190,7 +177,15 @@ updateCoeffs()
 
     ray.Qr().boundaryField()[patchI] += Iw*nAve;
 
-    const scalarField temissivity = emissivity();
+    const boundaryRadiationProperties& boundaryRadiation =
+        boundaryRadiationProperties::New(dimensionedInternalField().mesh());
+
+    const tmp<scalarField> temissivity
+    (
+        boundaryRadiation.emissivity(patch().index())
+    );
+
+    const scalarField& emissivity = temissivity();
 
     scalarField& Qem = ray.Qem().boundaryField()[patchI];
     scalarField& Qin = ray.Qin().boundaryField()[patchI];
@@ -206,6 +201,14 @@ updateCoeffs()
         Ir += dom.IRay(rayI).Qin().boundaryField()[patchI];
     }
 
+    if (solarLoad_)
+    {
+        Ir += patch().lookupPatchField<volScalarField,scalar>
+        (
+            radiation.externalRadHeatFieldName_
+        );
+    }
+
     forAll(Iw, faceI)
     {
         if ((-n[faceI] & myRayId) > 0.0)
@@ -215,8 +218,8 @@ updateCoeffs()
             valueFraction()[faceI] = 1.0;
             refValue()[faceI] =
                 (
-                    Ir[faceI]*(scalar(1.0) - temissivity[faceI])
-                  + temissivity[faceI]*physicoChemical::sigma.value()
+                    Ir[faceI]*(scalar(1.0) - emissivity[faceI])
+                  + emissivity[faceI]*physicoChemical::sigma.value()
                   * pow4(Tp[faceI])
                 )/pi;
 
@@ -248,8 +251,8 @@ void Foam::radiation::greyDiffusiveRadiationMixedFvPatchScalarField::write
 ) const
 {
     mixedFvPatchScalarField::write(os);
-    radiationCoupledBase::write(os);
     writeEntryIfDifferent<word>(os, "T", "T", TName_);
+    os.writeKeyword("solarLoad") << solarLoad_ << token::END_STATEMENT << nl;
 }
 
 
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveRadiation/greyDiffusiveRadiationMixedFvPatchScalarField.H b/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveRadiation/greyDiffusiveRadiationMixedFvPatchScalarField.H
index d554d59708..bce882d5d7 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveRadiation/greyDiffusiveRadiationMixedFvPatchScalarField.H
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveRadiation/greyDiffusiveRadiationMixedFvPatchScalarField.H
@@ -38,7 +38,6 @@ Description
     \table
         Property     | Description             | Required    | Default value
         T            | temperature field name  | no          | T
-        emissivityMode | emissivity mode: solidRadiation or lookup | yes |
     \endtable
 
     Example of the boundary condition specification:
@@ -47,15 +46,14 @@ Description
     {
         type            greyDiffusiveRadiation;
         T               T;
-        emissivityMode  solidRadiation;
         value           uniform 0;
     }
     \endverbatim
 
 SeeAlso
-    Foam::radiationCoupledBase
     Foam::radiation::radiationModel
     Foam::radiation::fvDOM
+    Foam::radiationCoupledBase
     Foam::mixedFvPatchField
 
 SourceFiles
@@ -67,7 +65,6 @@ SourceFiles
 #define greyDiffusiveRadiationMixedFvPatchScalarField_H
 
 #include "mixedFvPatchFields.H"
-#include "radiationCoupledBase.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -81,14 +78,16 @@ namespace radiation
 
 class greyDiffusiveRadiationMixedFvPatchScalarField
 :
-    public mixedFvPatchScalarField,
-    public radiationCoupledBase
+    public mixedFvPatchScalarField
 {
     // Private data
 
         //- Name of temperature field
         word TName_;
 
+        //- Activate solar load
+        bool solarLoad_;
+
 
 public:
 
@@ -191,8 +190,8 @@ public:
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-} // End namespace radiation
 } // End namespace Foam
+}
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveViewFactor/greyDiffusiveViewFactorFixedValueFvPatchScalarField.C b/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveViewFactor/greyDiffusiveViewFactorFixedValueFvPatchScalarField.C
index 233d80b450..5ae7ff434b 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveViewFactor/greyDiffusiveViewFactorFixedValueFvPatchScalarField.C
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveViewFactor/greyDiffusiveViewFactorFixedValueFvPatchScalarField.C
@@ -27,7 +27,7 @@ License
 #include "addToRunTimeSelectionTable.H"
 #include "fvPatchFieldMapper.H"
 #include "volFields.H"
-
+#include "radiationModel.H"
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
@@ -39,8 +39,8 @@ greyDiffusiveViewFactorFixedValueFvPatchScalarField
 )
 :
     fixedValueFvPatchScalarField(p, iF),
-    radiationCoupledBase(patch(), "undefined", scalarField::null()),
-    Qro_(p.size(), 0.0)
+    Qro_(),
+    solarLoad_(false)
 {}
 
 
@@ -54,13 +54,8 @@ greyDiffusiveViewFactorFixedValueFvPatchScalarField
 )
 :
     fixedValueFvPatchScalarField(ptf, p, iF, mapper),
-    radiationCoupledBase
-    (
-        patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
-    Qro_(ptf.Qro_)
+    Qro_(ptf.Qro_, mapper),
+    solarLoad_(ptf.solarLoad_)
 {}
 
 
@@ -73,8 +68,8 @@ greyDiffusiveViewFactorFixedValueFvPatchScalarField
 )
 :
     fixedValueFvPatchScalarField(p, iF),
-    radiationCoupledBase(p, dict),
-    Qro_("Qro", dict, p.size())
+    Qro_("Qro", dict, p.size()),
+    solarLoad_(dict.lookupOrDefault<bool>("solarLoad", false))
 {
     if (dict.found("value"))
     {
@@ -98,13 +93,8 @@ greyDiffusiveViewFactorFixedValueFvPatchScalarField
 )
 :
     fixedValueFvPatchScalarField(ptf),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
-    Qro_(ptf.Qro_)
+    Qro_(ptf.Qro_),
+    solarLoad_(ptf.solarLoad_)
 {}
 
 
@@ -116,13 +106,8 @@ greyDiffusiveViewFactorFixedValueFvPatchScalarField
 )
 :
     fixedValueFvPatchScalarField(ptf, iF),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
-    Qro_(ptf.Qro_)
+    Qro_(ptf.Qro_),
+    solarLoad_(ptf.solarLoad_)
 {}
 
 
@@ -136,6 +121,7 @@ updateCoeffs()
         return;
     }
 
+
     // Do nothing
 
     if (debug)
@@ -152,8 +138,26 @@ updateCoeffs()
             << " avg:" << gAverage(*this)
             << endl;
     }
+}
 
-    fixedValueFvPatchScalarField::updateCoeffs();
+
+Foam::tmp<Foam::scalarField> Foam::radiation::
+greyDiffusiveViewFactorFixedValueFvPatchScalarField::Qro() const
+{
+    tmp<scalarField> tQrt(new scalarField(Qro_));
+
+    if (solarLoad_)
+    {
+        const radiationModel& radiation =
+            db().lookupObject<radiationModel>("radiationProperties");
+
+        tQrt() += patch().lookupPatchField<volScalarField,scalar>
+        (
+            radiation.externalRadHeatFieldName_
+        );
+    }
+
+    return tQrt;
 }
 
 
@@ -164,8 +168,8 @@ write
 ) const
 {
     fixedValueFvPatchScalarField::write(os);
-    radiationCoupledBase::write(os);
     Qro_.writeEntry("Qro", os);
+    os.writeKeyword("solarLoad") << solarLoad_ << token::END_STATEMENT << nl;
 }
 
 
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveViewFactor/greyDiffusiveViewFactorFixedValueFvPatchScalarField.H b/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveViewFactor/greyDiffusiveViewFactorFixedValueFvPatchScalarField.H
index 820fde3ee5..dd5c3564c8 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveViewFactor/greyDiffusiveViewFactorFixedValueFvPatchScalarField.H
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/greyDiffusiveViewFactor/greyDiffusiveViewFactorFixedValueFvPatchScalarField.H
@@ -36,7 +36,6 @@ Description
     \table
         Property     | Description             | Required    | Default value
         Qro          | external radiative heat flux | yes    |
-        emissivityMode | emissivity mode: solidRadiation or lookup | yes |
     \endtable
 
     Example of the boundary condition specification:
@@ -45,15 +44,14 @@ Description
     {
         type            greyDiffusiveRadiationViewFactor;
         Qro             uniform 0;
-        emissivityMode  solidRadiation;
         value           uniform 0;
     }
     \endverbatim
 
 SeeAlso
-    Foam::radiationCoupledBase
     Foam::radiation::radiationModel
     Foam::radiation::viewFactor
+    Foam::radiationCoupledBase
     Foam::fixedValueFvPatchField
 
 SourceFiles
@@ -64,7 +62,6 @@ SourceFiles
 #ifndef greyDiffusiveViewFactorFixedValueFvPatchScalarField_H
 #define greyDiffusiveViewFactorFixedValueFvPatchScalarField_H
 
-#include "radiationCoupledBase.H"
 #include "fixedValueFvPatchFields.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -73,21 +70,22 @@ namespace Foam
 {
 namespace radiation
 {
-
 /*---------------------------------------------------------------------------*\
       Class greyDiffusiveViewFactorFixedValueFvPatchScalarField declaration
 \*---------------------------------------------------------------------------*/
 
 class greyDiffusiveViewFactorFixedValueFvPatchScalarField
 :
-    public fixedValueFvPatchScalarField,
-    public radiationCoupledBase
+    public fixedValueFvPatchScalarField
 {
     // Private data
 
         //- External radiative heat flux
         scalarField Qro_;
 
+        //- Activate solar load
+        bool solarLoad_;
+
 
 public:
 
@@ -165,11 +163,8 @@ public:
 
         // Access
 
-            //- Return external radiative heat flux
-            const scalarList& Qro()
-            {
-                return Qro_;
-            }
+            //- Return external + solar load radiative heat flux
+            tmp<scalarField> Qro() const;
 
 
         // Evaluation functions
@@ -187,8 +182,8 @@ public:
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-} // End namespace radiation
 } // End namespace Foam
+}
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/radiationCoupledBase/radiationCoupledBase.C b/src/thermophysicalModels/radiation/derivedFvPatchFields/radiationCoupledBase/radiationCoupledBase.C
deleted file mode 100644
index b1a1886130..0000000000
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/radiationCoupledBase/radiationCoupledBase.C
+++ /dev/null
@@ -1,248 +0,0 @@
-/*---------------------------------------------------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
-     \\/     M anipulation  |
--------------------------------------------------------------------------------
-License
-    This file is part of OpenFOAM.
-
-    OpenFOAM is free software: you can redistribute it and/or modify it
-    under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
-    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-    for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
-
-\*---------------------------------------------------------------------------*/
-
-#include "radiationCoupledBase.H"
-#include "volFields.H"
-#include "mappedPatchBase.H"
-#include "fvPatchFieldMapper.H"
-#include "radiationModel.H"
-#include "absorptionEmissionModel.H"
-
-// * * * * * * * * * * * * * Static Member Data  * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-    defineTypeNameAndDebug(radiationCoupledBase, 0);
-}
-
-
-namespace Foam
-{
-    template<>
-    const char* Foam::NamedEnum
-    <
-        Foam::radiationCoupledBase::emissivityMethodType,
-        2
-    >::names[] =
-    {
-        "solidRadiation",
-        "lookup"
-    };
-}
-
-
-const Foam::NamedEnum<Foam::radiationCoupledBase::emissivityMethodType, 2>
-    Foam::radiationCoupledBase::emissivityMethodTypeNames_;
-
-
-// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
-
-Foam::radiationCoupledBase::radiationCoupledBase
-(
-    const fvPatch& patch,
-    const word& calculationType,
-    const scalarField& emissivity
-)
-:
-    patch_(patch),
-    method_(emissivityMethodTypeNames_[calculationType]),
-    emissivity_(emissivity)
-{}
-
-
-Foam::radiationCoupledBase::radiationCoupledBase
-(
-    const fvPatch& patch,
-    const word& calculationType,
-    const scalarField& emissivity,
-    const fvPatchFieldMapper& mapper
-)
-:
-    patch_(patch),
-    method_(emissivityMethodTypeNames_[calculationType]),
-    emissivity_(emissivity, mapper)
-{}
-
-
-Foam::radiationCoupledBase::radiationCoupledBase
-(
-    const fvPatch& patch,
-    const dictionary& dict
-)
-:
-    patch_(patch),
-    method_(emissivityMethodTypeNames_.read(dict.lookup("emissivityMode")))
-{
-    switch (method_)
-    {
-        case SOLIDRADIATION:
-        {
-            if (!isA<mappedPatchBase>(patch_.patch()))
-            {
-                FatalIOErrorIn
-                (
-                    "radiationCoupledBase::radiationCoupledBase\n"
-                    "(\n"
-                    "    const fvPatch& p,\n"
-                    "    const dictionary& dict\n"
-                    ")\n",
-                    dict
-                )   << "\n    patch type '" << patch_.type()
-                    << "' not type '" << mappedPatchBase::typeName << "'"
-                    << "\n    for patch " << patch_.name()
-                    << exit(FatalIOError);
-            }
-
-            emissivity_ = scalarField(patch_.size(), 0.0);
-        }
-        break;
-
-        case LOOKUP:
-        {
-            if (!dict.found("emissivity"))
-            {
-                FatalIOErrorIn
-                (
-                    "radiationCoupledBase::radiationCoupledBase\n"
-                    "(\n"
-                    "    const fvPatch& p,\n"
-                    "    const dictionary& dict\n"
-                    ")\n",
-                    dict
-                )   << "\n    emissivity key does not exist for patch "
-                    << patch_.name()
-                    << exit(FatalIOError);
-            }
-            else
-            {
-                emissivity_ = scalarField("emissivity", dict, patch_.size());
-            }
-        }
-        break;
-    }
-}
-
-
-// * * * * * * * * * * * * * * * * Destructor    * * * * * * * * * * * * * * //
-
-Foam::radiationCoupledBase::~radiationCoupledBase()
-{}
-
-
-// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
-
-Foam::scalarField Foam::radiationCoupledBase::emissivity() const
-{
-    switch (method_)
-    {
-        case SOLIDRADIATION:
-        {
-            // Get the coupling information from the mappedPatchBase
-            const mappedPatchBase& mpp =
-                refCast<const mappedPatchBase>(patch_.patch());
-
-            const polyMesh& nbrMesh = mpp.sampleMesh();
-
-            const radiation::radiationModel& radiation =
-                nbrMesh.lookupObject<radiation::radiationModel>
-                (
-                    "radiationProperties"
-                );
-
-
-            const fvMesh& nbrFvMesh = refCast<const fvMesh>(nbrMesh);
-
-            const fvPatch& nbrPatch =
-                nbrFvMesh.boundary()[mpp.samplePolyPatch().index()];
-
-
-            scalarField emissivity
-            (
-                radiation.absorptionEmission().e()().boundaryField()
-                [
-                    nbrPatch.index()
-                ]
-            );
-            mpp.distribute(emissivity);
-
-            return emissivity;
-
-        }
-        break;
-
-        case LOOKUP:
-        {
-            // return local value
-            return emissivity_;
-        }
-
-        default:
-        {
-            FatalErrorIn
-            (
-                "radiationCoupledBase::emissivity(const scalarField&)"
-            )   << "Unimplemented method " << method_ << endl
-                << "Please set 'emissivity' to one of "
-                << emissivityMethodTypeNames_.toc()
-                << exit(FatalError);
-        }
-        break;
-    }
-
-    return scalarField(0);
-}
-
-
-void Foam::radiationCoupledBase::autoMap
-(
-    const fvPatchFieldMapper& m
-)
-{
-    emissivity_.autoMap(m);
-}
-
-
-void Foam::radiationCoupledBase::rmap
-(
-    const fvPatchScalarField& ptf,
-    const labelList& addr
-)
-{
-    const radiationCoupledBase& mrptf =
-        refCast<const radiationCoupledBase>(ptf);
-
-    emissivity_.rmap(mrptf.emissivity_, addr);
-}
-
-
-void Foam::radiationCoupledBase::write(Ostream& os) const
-{
-    os.writeKeyword("emissivityMode") << emissivityMethodTypeNames_[method_]
-        << token::END_STATEMENT << nl;
-    emissivity_.writeEntry("emissivity", os);
-}
-
-
-// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/radiationCoupledBase/radiationCoupledBase.H b/src/thermophysicalModels/radiation/derivedFvPatchFields/radiationCoupledBase/radiationCoupledBase.H
deleted file mode 100644
index 54902fa261..0000000000
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/radiationCoupledBase/radiationCoupledBase.H
+++ /dev/null
@@ -1,172 +0,0 @@
-/*---------------------------------------------------------------------------*\
-  =========                 |
-  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-   \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
-     \\/     M anipulation  |
--------------------------------------------------------------------------------
-License
-    This file is part of OpenFOAM.
-
-    OpenFOAM is free software: you can redistribute it and/or modify it
-    under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
-    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-    for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
-
-Class
-    radiationCoupledBase
-
-Description
-    Common functions to emissivity. It gets supplied from lookup into a
-    dictionary or calculated by the solidThermo:
-
-    - 'lookup' : Read the patch emissivity field from the dictionary
-    - 'solidRadiation' : Use the emissivity field mapped from the adjacent solid
-
-SourceFiles
-    radiationCoupledBase.C
-
-\*---------------------------------------------------------------------------*/
-
-#ifndef radiationCoupledBase_H
-#define radiationCoupledBase_H
-
-#include "scalarField.H"
-#include "NamedEnum.H"
-#include "fvPatch.H"
-#include "fvPatchFieldMapper.H"
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
-/*---------------------------------------------------------------------------*\
-                    Class radiationCoupledBase Declaration
-\*---------------------------------------------------------------------------*/
-
-class radiationCoupledBase
-{
-public:
-
-    //- Type of supplied emissivity
-    enum emissivityMethodType
-    {
-        SOLIDRADIATION,
-        LOOKUP
-    };
-
-
-private:
-
-    // Private data
-
-        static const NamedEnum<emissivityMethodType, 2>
-            emissivityMethodTypeNames_;
-
-        //- Underlying patch
-        const fvPatch& patch_;
-
-
-protected:
-
-    // Protected data
-
-        //- How to get emissivity
-        const emissivityMethodType method_;
-
-        //- Emissivity
-        // Cached locally when is read from dictionary (lookup mode)
-        scalarField emissivity_;
-
-
-public:
-
-     //- Runtime type information
-    TypeName("radiationCoupledBase");
-
-
-    // Constructors
-
-        //- Construct from patch, emissivity mode and emissivity
-        radiationCoupledBase
-        (
-            const fvPatch& patch,
-            const word& calculationMethod,
-            const scalarField& emissivity
-        );
-
-        //- Construct from patch, emissivity mode and emissivity and mapper
-        radiationCoupledBase
-        (
-            const fvPatch& patch,
-            const word& calculationMethod,
-            const scalarField& emissivity,
-            const fvPatchFieldMapper& mapper
-        );
-
-        //- Construct from patch and dictionary
-        radiationCoupledBase
-        (
-            const fvPatch& patch,
-            const dictionary& dict
-        );
-
-
-    //- Destructor
-        virtual ~radiationCoupledBase();
-
-
-    // Member functions
-
-        // Access
-
-            //- Method to obtain emissivity
-            word emissivityMethod() const
-            {
-                return emissivityMethodTypeNames_[method_];
-            }
-
-
-            //- Calculate corresponding emissivity field
-            scalarField emissivity() const;
-
-
-        // Mapping functions
-
-            //- Map (and resize as needed) from self given a mapping object
-            virtual void autoMap
-            (
-                const fvPatchFieldMapper&
-            );
-
-            //- Reverse map the given fvPatchField onto this fvPatchField
-            virtual void rmap
-            (
-                const fvPatchScalarField&,
-                const labelList&
-            );
-
-
-        //- Write
-        void write(Ostream&) const;
-};
-
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-#endif
-
-// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/wideBandDiffusiveRadiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.C b/src/thermophysicalModels/radiation/derivedFvPatchFields/wideBandDiffusiveRadiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.C
index 5c0d844701..bddab8bde0 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/wideBandDiffusiveRadiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.C
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/wideBandDiffusiveRadiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.C
@@ -31,6 +31,7 @@ License
 #include "fvDOM.H"
 #include "wideBandAbsorptionEmission.H"
 #include "constants.H"
+#include "boundaryRadiationProperties.H"
 
 using namespace Foam::constant;
 using namespace Foam::constant::mathematical;
@@ -44,9 +45,7 @@ wideBandDiffusiveRadiationMixedFvPatchScalarField
     const DimensionedField<scalar, volMesh>& iF
 )
 :
-    mixedFvPatchScalarField(p, iF),
-    radiationCoupledBase(p, "undefined", scalarField::null()),
-    TName_("T")
+    mixedFvPatchScalarField(p, iF)
 {
     refValue() = 0.0;
     refGrad() = 0.0;
@@ -63,14 +62,7 @@ wideBandDiffusiveRadiationMixedFvPatchScalarField
     const fvPatchFieldMapper& mapper
 )
 :
-    mixedFvPatchScalarField(ptf, p, iF, mapper),
-    radiationCoupledBase
-    (
-        p,
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
-    TName_(ptf.TName_)
+    mixedFvPatchScalarField(ptf, p, iF, mapper)
 {}
 
 
@@ -82,9 +74,7 @@ wideBandDiffusiveRadiationMixedFvPatchScalarField
     const dictionary& dict
 )
 :
-    mixedFvPatchScalarField(p, iF),
-    radiationCoupledBase(p, dict),
-    TName_(dict.lookupOrDefault<word>("T", "T"))
+    mixedFvPatchScalarField(p, iF)
 {
     if (dict.found("value"))
     {
@@ -98,12 +88,9 @@ wideBandDiffusiveRadiationMixedFvPatchScalarField
     }
     else
     {
-        const scalarField& Tp =
-            patch().lookupPatchField<volScalarField, scalar>(TName_);
-
-        refValue() =
-            4.0*physicoChemical::sigma.value()*pow4(Tp)*emissivity()/pi;
+        refValue() = 0.0;
         refGrad() = 0.0;
+        valueFraction() = 1.0;
 
         fvPatchScalarField::operator=(refValue());
     }
@@ -116,14 +103,7 @@ wideBandDiffusiveRadiationMixedFvPatchScalarField
     const wideBandDiffusiveRadiationMixedFvPatchScalarField& ptf
 )
 :
-    mixedFvPatchScalarField(ptf),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
-    TName_(ptf.TName_)
+    mixedFvPatchScalarField(ptf)
 {}
 
 
@@ -134,14 +114,7 @@ wideBandDiffusiveRadiationMixedFvPatchScalarField
     const DimensionedField<scalar, volMesh>& iF
 )
 :
-    mixedFvPatchScalarField(ptf, iF),
-    radiationCoupledBase
-    (
-        ptf.patch(),
-        ptf.emissivityMethod(),
-        ptf.emissivity_
-    ),
-    TName_(ptf.TName_)
+    mixedFvPatchScalarField(ptf, iF)
 {}
 
 
@@ -196,7 +169,16 @@ updateCoeffs()
         dom.blackBody().bLambda(lambdaId).boundaryField()[patchI]
     );
 
-    scalarField temissivity = emissivity();
+    const boundaryRadiationProperties& boundaryRadiation =
+        boundaryRadiationProperties::New(dimensionedInternalField().mesh());
+
+
+    const tmp<scalarField> temissivity
+    (
+        boundaryRadiation.emissivity(patch().index(), lambdaId)
+    );
+
+    const scalarField& emissivity = temissivity();
 
     scalarField& Qem = ray.Qem().boundaryField()[patchI];
     scalarField& Qin = ray.Qin().boundaryField()[patchI];
@@ -221,8 +203,8 @@ updateCoeffs()
             valueFraction()[faceI] = 1.0;
             refValue()[faceI] =
                 (
-                    Ir[faceI]*(1.0 - temissivity[faceI])
-                  + temissivity[faceI]*Eb[faceI]
+                    Ir[faceI]*(1.0 - emissivity[faceI])
+                  + emissivity[faceI]*Eb[faceI]
                 )/pi;
 
             // Emmited heat flux from this ray direction
@@ -253,8 +235,6 @@ void Foam::radiation::wideBandDiffusiveRadiationMixedFvPatchScalarField::write
 ) const
 {
     mixedFvPatchScalarField::write(os);
-    radiationCoupledBase::write(os);
-    writeEntryIfDifferent<word>(os, "T", "T", TName_);
 }
 
 
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/wideBandDiffusiveRadiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.H b/src/thermophysicalModels/radiation/derivedFvPatchFields/wideBandDiffusiveRadiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.H
index 612cce0445..fbed4f8399 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/wideBandDiffusiveRadiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.H
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/wideBandDiffusiveRadiation/wideBandDiffusiveRadiationMixedFvPatchScalarField.H
@@ -60,7 +60,7 @@ SourceFiles
 #define wideBandDiffusiveRadiationMixedFvPatchScalarField_H
 
 #include "mixedFvPatchFields.H"
-#include "radiationCoupledBase.H"
+
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -74,15 +74,8 @@ namespace radiation
 
 class wideBandDiffusiveRadiationMixedFvPatchScalarField
 :
-    public mixedFvPatchScalarField,
-    public radiationCoupledBase
+    public mixedFvPatchScalarField
 {
-    // Private data
-
-        //- Name of temperature field
-        word TName_;
-
-
 public:
 
     //- Runtime type information
@@ -153,20 +146,6 @@ public:
 
     // Member functions
 
-        // Access
-
-            //- Return the temperature field name
-            const word& TName() const
-            {
-                return TName_;
-            }
-
-            //- Return reference to the temperature field name to allow
-            //  adjustment
-            word& TName()
-            {
-                return TName_;
-            }
 
 
         // Evaluation functions
diff --git a/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.C b/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.C
index 9c6781cef8..4828bc072c 100644
--- a/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.C
+++ b/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.C
@@ -87,14 +87,6 @@ void Foam::radiation::fvDOM::initialise()
     // 2D
     else if (mesh_.nSolutionD() == 2)
     {
-        // Currently 2D solution is limited to the x-y plane
-        if (mesh_.solutionD()[vector::Z] != -1)
-        {
-            FatalErrorIn("fvDOM::initialise()")
-                << "Currently 2D solution is limited to the x-y plane"
-                << exit(FatalError);
-        }
-
         scalar thetai = piByTwo;
         scalar deltaTheta = pi;
         nRay_ = 4*nPhi_;
@@ -127,14 +119,6 @@ void Foam::radiation::fvDOM::initialise()
     // 1D
     else
     {
-        // Currently 1D solution is limited to the x-direction
-        if (mesh_.solutionD()[vector::X] != 1)
-        {
-            FatalErrorIn("fvDOM::initialise()")
-                << "Currently 1D solution is limited to the x-direction"
-                << exit(FatalError);
-        }
-
         scalar thetai = piByTwo;
         scalar deltaTheta = pi;
         nRay_ = 2;
@@ -221,11 +205,38 @@ void Foam::radiation::fvDOM::initialise()
         {
             omegaMax_ = IRay_[rayId].omega();
         }
-        Info<< '\t' << IRay_[rayId].I().name() << " : " << "omega : "
-            << '\t' << IRay_[rayId].omega() << nl;
+        Info<< '\t' << IRay_[rayId].I().name() << " : " << "dAve : "
+            << '\t' << IRay_[rayId].dAve() << nl;
     }
 
     Info<< endl;
+
+    if (this->found("useSolarLoad"))
+    {
+        this->lookup("useSolarLoad") >> useSolarLoad_;
+    }
+
+    if (useSolarLoad_)
+    {
+        const dictionary& solarDict = this->subDict("solarLoarCoeffs");
+        solarLoad_.reset
+        (
+            new solarLoad(solarDict, T_, externalRadHeatFieldName_)
+        );
+
+        if (solarLoad_->nBands() > 1)
+        {
+            FatalErrorIn
+            (
+                "const Foam::radiation::fvDOM::initialise()"
+            )
+                << "Requested solar radiation with fvDOM. Using "
+                << "more than one band for the solar load is not allowed"
+                << abort(FatalError);
+            }
+
+        Info<< "Creating Solar Load Model " << nl;
+    }
 }
 
 
@@ -294,7 +305,7 @@ Foam::radiation::fvDOM::fvDOM(const volScalarField& T)
             mesh_.time().timeName(),
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         mesh_,
         dimensionedScalar("a", dimless/dimLength, 0.0)
@@ -310,7 +321,13 @@ Foam::radiation::fvDOM::fvDOM(const volScalarField& T)
     maxIter_(coeffs_.lookupOrDefault<label>("maxIter", 50)),
     fvRayDiv_(nLambda_),
     cacheDiv_(coeffs_.lookupOrDefault<bool>("cacheDiv", false)),
-    omegaMax_(0)
+    omegaMax_(0),
+    useSolarLoad_(false),
+    solarLoad_(),
+    meshOrientation_
+    (
+        coeffs_.lookupOrDefault<vector>("meshOrientation", vector::zero)
+    )
 {
     initialise();
 }
@@ -399,7 +416,13 @@ Foam::radiation::fvDOM::fvDOM
     maxIter_(coeffs_.lookupOrDefault<label>("maxIter", 50)),
     fvRayDiv_(nLambda_),
     cacheDiv_(coeffs_.lookupOrDefault<bool>("cacheDiv", false)),
-    omegaMax_(0)
+    omegaMax_(0),
+    useSolarLoad_(false),
+    solarLoad_(),
+    meshOrientation_
+    (
+        coeffs_.lookupOrDefault<vector>("meshOrientation", vector::zero)
+    )
 {
     initialise();
 }
@@ -436,6 +459,11 @@ void Foam::radiation::fvDOM::calculate()
 
     updateBlackBodyEmission();
 
+    if (useSolarLoad_)
+    {
+        solarLoad_->calculate();
+    }
+
     // Set rays convergence false
     List<bool> rayIdConv(nRay_, false);
 
@@ -482,8 +510,7 @@ Foam::tmp<Foam::volScalarField> Foam::radiation::fvDOM::Rp() const
                 IOobject::NO_WRITE,
                 false
             ),
-            // Only include continuous phase emission
-            4*absorptionEmission_->aCont()*physicoChemical::sigma
+            4.0*a_*physicoChemical::sigma //absorptionEmission_->a()
         )
     );
 }
@@ -495,15 +522,12 @@ Foam::radiation::fvDOM::Ru() const
 
     const DimensionedField<scalar, volMesh>& G =
         G_.dimensionedInternalField();
-
     const DimensionedField<scalar, volMesh> E =
         absorptionEmission_->ECont()().dimensionedInternalField();
-
-    // Only include continuous phase absorption
     const DimensionedField<scalar, volMesh> a =
-        absorptionEmission_->aCont()().dimensionedInternalField();
+        a_.dimensionedInternalField();
 
-    return a*G - E;
+    return  a*G - E;
 }
 
 
diff --git a/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.H b/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.H
index dd8bb8c1db..4fb15edbc5 100644
--- a/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.H
+++ b/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.H
@@ -47,16 +47,23 @@ Description
             cacheDiv    true;       // cache the div of the RTE equation.
             //NOTE: Caching div is "only" accurate if the upwind scheme is used
             //in div(Ji,Ii_h)
+             meshOrientation    (1 1 1); //Mesh ortientation used for 2D and 1D
         }
 
         solverFreq   1; // Number of flow iterations per radiation iteration
     \endverbatim
 
-    The total number of solid angles is  4*nPhi*nTheta.
+    The total number of solid angles is  4*nPhi*nTheta in 3-D.
 
-    In 1D the direction of the rays is X (nPhi and nTheta are ignored)
-    In 2D the direction of the rays is on X-Y plane (only nPhi is considered)
-    In 3D (nPhi and nTheta are considered)
+    In 1-D the ray directions are on X, Y or Z (nPhi and nTheta are ignored).
+    'meshOrientation' vector can be used for any other 1D direction.
+
+    In 2-D the ray directions are on X-Y, X-Z or Y-Z planes.
+    (only nPhi is considered). 'meshOrientation' vector can be used for
+    not-aligned planes specifying the plane normal vector.
+
+    In 3D (nPhi and nTheta are considered). 'meshOrientation' vector is not
+    considered.
 
 SourceFiles
     fvDOM.C
@@ -69,6 +76,7 @@ SourceFiles
 #include "radiativeIntensityRay.H"
 #include "radiationModel.H"
 #include "fvMatrices.H"
+#include "solarLoad.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -139,6 +147,15 @@ class fvDOM
         //- Maximum omega weight
         scalar omegaMax_;
 
+        //- Use Solar Load model
+        bool useSolarLoad_;
+
+        //- Solar load radiation model
+        autoPtr<solarLoad> solarLoad_;
+
+        //- Mesh orientation vector
+        vector meshOrientation_;
+
 
     // Private Member Functions
 
@@ -260,6 +277,9 @@ public:
 
             //- Return omegaMax
             inline scalar omegaMax() const;
+
+            //- Return meshOrientation
+            inline vector meshOrientation() const;
 };
 
 
diff --git a/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOMI.H b/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOMI.H
index 8e4c201b31..c840899354 100644
--- a/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOMI.H
+++ b/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOMI.H
@@ -132,4 +132,10 @@ inline Foam::scalar Foam::radiation::fvDOM::omegaMax() const
 }
 
 
+inline Foam::vector Foam::radiation::fvDOM::meshOrientation() const
+{
+    return meshOrientation_;
+}
+
+
 // ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/radiationModels/fvDOM/radiativeIntensityRay/radiativeIntensityRay.C b/src/thermophysicalModels/radiation/radiationModels/fvDOM/radiativeIntensityRay/radiativeIntensityRay.C
index 64e42b85bb..249f25d716 100644
--- a/src/thermophysicalModels/radiation/radiationModels/fvDOM/radiativeIntensityRay/radiativeIntensityRay.C
+++ b/src/thermophysicalModels/radiation/radiationModels/fvDOM/radiativeIntensityRay/radiativeIntensityRay.C
@@ -30,6 +30,7 @@ License
 
 using namespace Foam::constant;
 
+
 const Foam::word
 Foam::radiation::radiativeIntensityRay::intensityPrefix("ILambda");
 
@@ -135,6 +136,53 @@ Foam::radiation::radiativeIntensityRay::radiativeIntensityRay
         0.5*deltaPhi*Foam::sin(2.0*theta)*Foam::sin(deltaTheta)
     );
 
+    if (mesh_.nSolutionD() == 2)
+    {
+        vector meshDir(vector::zero);
+        if (dom_.meshOrientation() != vector::zero)
+        {
+            meshDir = dom_.meshOrientation();
+        }
+        else
+        {
+            for (direction cmpt=0; cmpt<vector::nComponents; cmpt++)
+            {
+                if (mesh_.geometricD()[cmpt] == -1)
+                {
+                    meshDir[cmpt] = 1;
+                }
+            }
+        }
+        const vector normal(vector(0, 0, 1));
+
+        const tensor coordRot = rotationTensor(normal, meshDir);
+
+        dAve_ = coordRot & dAve_;
+        d_ = coordRot & d_;
+    }
+    else if (mesh_.nSolutionD() == 1)
+    {
+        vector meshDir(vector::zero);
+        if (dom_.meshOrientation() != vector::zero)
+        {
+            meshDir = dom_.meshOrientation();
+        }
+        else
+        {
+            for (direction cmpt=0; cmpt<vector::nComponents; cmpt++)
+            {
+                if (mesh_.geometricD()[cmpt] == 1)
+                {
+                    meshDir[cmpt] = 1;
+                }
+            }
+        }
+        const vector normal(vector(1, 0, 0));
+
+        dAve_ = (dAve_ & normal)*meshDir;
+        d_ = (d_ & normal)*meshDir;
+    }
+
     autoPtr<volScalarField> IDefaultPtr;
 
     forAll(ILambda_, lambdaI)
@@ -224,14 +272,11 @@ Foam::scalar Foam::radiation::radiativeIntensityRay::correct()
               + fvm::Sp(k*omega_, ILambda_[lambdaI])
             ==
                 1.0/constant::mathematical::pi*omega_
-               *(
-                    // Remove aDisp from k
+              * (
                     (k - absorptionEmission_.aDisp(lambdaI))
-                   *blackBody_.bLambda(lambdaI)
+                    *blackBody_.bLambda(lambdaI)
 
                   + absorptionEmission_.ECont(lambdaI)
-
-                    // Add EDisp term from parcels
                   + absorptionEmission_.EDisp(lambdaI)
                 )
             );
@@ -245,13 +290,10 @@ Foam::scalar Foam::radiation::radiativeIntensityRay::correct()
            ==
                1.0/constant::mathematical::pi*omega_
              * (
-                   // Remove aDisp from k
-                   (k - absorptionEmission_.aDisp(lambdaI))
-                  *blackBody_.bLambda(lambdaI)
+                    (k - absorptionEmission_.aDisp(lambdaI))
+                   *blackBody_.bLambda(lambdaI)
 
                  + absorptionEmission_.ECont(lambdaI)
-
-                   // Add EDisp term from parcels
                  + absorptionEmission_.EDisp(lambdaI)
                )
             );
diff --git a/src/thermophysicalModels/radiation/radiationModels/radiationModel/radiationModel.C b/src/thermophysicalModels/radiation/radiationModels/radiationModel/radiationModel.C
index c73602c3d3..6699cc04ce 100644
--- a/src/thermophysicalModels/radiation/radiationModels/radiationModel/radiationModel.C
+++ b/src/thermophysicalModels/radiation/radiationModels/radiationModel/radiationModel.C
@@ -42,6 +42,8 @@ namespace Foam
     }
 }
 
+const Foam::word Foam::radiation::radiationModel::externalRadHeatFieldName_ =
+    "QrExt";
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -86,6 +88,8 @@ void Foam::radiation::radiationModel::initialise()
         scatter_.reset(scatterModel::New(*this, mesh_).ptr());
 
         soot_.reset(sootModel::New(*this, mesh_).ptr());
+
+        transmissivity_.reset(transmissivityModel::New(*this, mesh_).ptr());
     }
 }
 
@@ -114,7 +118,8 @@ Foam::radiation::radiationModel::radiationModel(const volScalarField& T)
     firstIter_(true),
     absorptionEmission_(NULL),
     scatter_(NULL),
-    soot_(NULL)
+    soot_(NULL),
+    transmissivity_(NULL)
 {}
 
 
@@ -134,7 +139,8 @@ Foam::radiation::radiationModel::radiationModel
     firstIter_(true),
     absorptionEmission_(NULL),
     scatter_(NULL),
-    soot_(NULL)
+    soot_(NULL),
+    transmissivity_(NULL)
 {
     if (readOpt() == IOobject::NO_READ)
     {
@@ -173,7 +179,8 @@ Foam::radiation::radiationModel::radiationModel
     firstIter_(true),
     absorptionEmission_(NULL),
     scatter_(NULL),
-    soot_(NULL)
+    soot_(NULL),
+    transmissivity_(NULL)
 {
     initialise();
 }
@@ -294,4 +301,22 @@ Foam::radiation::radiationModel::soot() const
 }
 
 
+const Foam::radiation::transmissivityModel&
+Foam::radiation::radiationModel::transmissivity() const
+{
+    if (!transmissivity_.valid())
+    {
+        FatalErrorIn
+        (
+            "const Foam::radiation::transmissivityModel&"
+            "Foam::radiation::radiationModel::transmissivity() const"
+        )
+            << "Requested radiation transmissivity model, but model is "
+            << "not activate" << abort(FatalError);
+    }
+
+    return transmissivity_();
+}
+
+
 // ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/radiationModels/radiationModel/radiationModel.H b/src/thermophysicalModels/radiation/radiationModels/radiationModel/radiationModel.H
index 08b797eb2a..7c11eab46a 100644
--- a/src/thermophysicalModels/radiation/radiationModels/radiationModel/radiationModel.H
+++ b/src/thermophysicalModels/radiation/radiationModels/radiationModel/radiationModel.H
@@ -49,6 +49,7 @@ SourceFiles
 #include "DimensionedField.H"
 #include "fvMatricesFwd.H"
 #include "Switch.H"
+#include "transmissivityModel.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -74,8 +75,17 @@ class radiationModel
 :
     public IOdictionary
 {
+public:
+
+    // Static data
+
+        //- Static name external radiative fluxes
+        static const word externalRadHeatFieldName_;
+
 protected:
 
+
+
     // Protected data
 
         //- Reference to the mesh database
@@ -112,6 +122,9 @@ protected:
             //- Soot model
             autoPtr<sootModel> soot_;
 
+            //- Transmissivity model
+            autoPtr<transmissivityModel> transmissivity_;
+
 
 private:
 
@@ -237,8 +250,12 @@ public:
             //- Access to absorptionEmission model
             const absorptionEmissionModel& absorptionEmission() const;
 
+            //- Access to transmissivity Model
+            const transmissivityModel& transmissivity() const;
+
             //- Access to soot Model
             const sootModel& soot() const;
+
 };
 
 
diff --git a/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.C b/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.C
new file mode 100644
index 0000000000..0389e6562f
--- /dev/null
+++ b/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.C
@@ -0,0 +1,447 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "faceShading.H"
+#include "fvMesh.H"
+#include "boundaryRadiationProperties.H"
+#include "OFstream.H"
+#include "cyclicAMIPolyPatch.H"
+#include "volFields.H"
+#include "distributedTriSurfaceMesh.H"
+
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    defineTypeNameAndDebug(faceShading, 0);
+}
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+
+void Foam::faceShading::writeRays
+(
+    const fileName& fName,
+    const DynamicField<point>& endCf,
+    const pointField& myFc
+)
+{
+    OFstream str(fName);
+    label vertI = 0;
+
+    Pout<< "Dumping rays to " << str.name() << endl;
+
+    forAll(myFc, faceI)
+    {
+        meshTools::writeOBJ(str, myFc[faceI]);
+        vertI++;
+        meshTools::writeOBJ(str, endCf[faceI]);
+        vertI++;
+        str << "l " << vertI-1 << ' ' << vertI << nl;
+    }
+    string cmd("objToVTK " + fName + " " + fName.lessExt() + ".vtk");
+    Pout<< "cmd:" << cmd << endl;
+    system(cmd);
+}
+
+
+Foam::triSurface Foam::faceShading::triangulate
+(
+    const labelHashSet& includePatches,
+    const List<labelHashSet>& includeAllFacesPerPatch
+)
+{
+    const polyBoundaryMesh& bMesh = mesh_.boundaryMesh();
+
+    // Storage for surfaceMesh. Size estimate.
+    DynamicList<labelledTri> triangles
+    (
+        mesh_.nFaces() - mesh_.nInternalFaces()
+    );
+
+    label newPatchI = 0;
+
+    forAllConstIter(labelHashSet, includePatches, iter)
+    {
+        const label patchI = iter.key();
+        const polyPatch& patch = bMesh[patchI];
+        const pointField& points = patch.points();
+
+        label nTriTotal = 0;
+
+        if (includeAllFacesPerPatch[patchI].size() > 0)
+        {
+            forAllConstIter
+            (
+                labelHashSet,
+                includeAllFacesPerPatch[patchI],
+                iter1
+            )
+            {
+                const label patchFaceI = iter1.key();
+
+                const face& f = patch[patchFaceI];
+
+                faceList triFaces(f.nTriangles(points));
+
+                label nTri = 0;
+
+                f.triangles(points, nTri, triFaces);
+
+                forAll(triFaces, triFaceI)
+                {
+                    const face& f = triFaces[triFaceI];
+
+                    triangles.append
+                    (
+                        labelledTri(f[0], f[1], f[2], newPatchI)
+                    );
+                    nTriTotal++;
+                }
+            }
+            newPatchI++;
+        }
+    }
+
+    triangles.shrink();
+
+    // Create globally numbered tri surface
+    triSurface rawSurface(triangles, mesh_.points());
+
+    // Create locally numbered tri surface
+    triSurface surface
+    (
+        rawSurface.localFaces(),
+        rawSurface.localPoints()
+    );
+
+    // Add patch names to surface
+    surface.patches().setSize(newPatchI);
+
+    newPatchI = 0;
+
+    forAllConstIter(labelHashSet, includePatches, iter)
+    {
+        const label patchI = iter.key();
+        const polyPatch& patch = bMesh[patchI];
+
+        if (includeAllFacesPerPatch[patchI].size() > 0)
+        {
+            surface.patches()[newPatchI].name() = patch.name();
+            surface.patches()[newPatchI].geometricType() = patch.type();
+
+            newPatchI++;
+        }
+    }
+
+    return surface;
+}
+
+
+void Foam::faceShading::calculate()
+{
+    const radiation::boundaryRadiationProperties& boundaryRadiation =
+        radiation::boundaryRadiationProperties::New(mesh_);
+
+    label nFaces = 0;          //total number of direct hit faces
+
+    const polyBoundaryMesh& patches = mesh_.boundaryMesh();
+
+    DynamicList<point> dynCf(nFaces);
+    DynamicList<label> dynFacesI;
+
+    forAll(patches, patchI)
+    {
+        const polyPatch& pp = patches[patchI];
+        const pointField& cf = pp.faceCentres();
+
+        if (!pp.coupled() && !isA<cyclicAMIPolyPatch>(pp))
+        {
+            const tmp<scalarField> tt =
+                boundaryRadiation.transmissivity(patchI);
+            const scalarField& t = tt();
+            const vectorField& n = pp.faceNormals();
+
+            forAll(n, faceI)
+            {
+                const vector nf(n[faceI]);
+                if (((direction_ & nf) > 0) && (t[faceI] == 0.0))
+                {
+                    dynFacesI.append(faceI + pp.start());
+                    dynCf.append(cf[faceI]);
+                    nFaces++;
+                }
+            }
+        }
+    }
+
+    label numberPotentialHits = nFaces;
+
+    reduce(numberPotentialHits, sumOp<label>());
+
+    Info<< "Number of 'potential' direct hits : "
+        << numberPotentialHits << endl;
+
+    labelList hitFacesIds(nFaces);
+    hitFacesIds.transfer(dynFacesI);
+
+    pointField Cfs(hitFacesIds.size());
+    Cfs.transfer(dynCf);
+
+    // * * * * * * * * * * * * * * *
+    // Create distributedTriSurfaceMesh
+    Random rndGen(653213);
+
+    // Determine mesh bounding boxes:
+    List<treeBoundBox> meshBb
+    (
+        1,
+        treeBoundBox
+        (
+            boundBox(mesh_.points(), false)
+        ).extend(rndGen, 1e-3)
+    );
+
+    // Dummy bounds dictionary
+    dictionary dict;
+    dict.add("bounds", meshBb);
+    dict.add
+    (
+        "distributionType",
+        distributedTriSurfaceMesh::distributionTypeNames_
+        [
+            distributedTriSurfaceMesh::FROZEN
+        ]
+    );
+    dict.add("mergeDistance", SMALL);
+
+    labelHashSet includePatches;
+    List<labelHashSet> includeAllFacesPerPatch(patches.size());
+
+    forAll(patches, patchI)
+    {
+        const polyPatch& pp = patches[patchI];
+        if (!pp.coupled() && !isA<cyclicAMIPolyPatch>(pp))
+        {
+            includePatches.insert(patchI);
+
+            const tmp<scalarField> tt =
+                boundaryRadiation.transmissivity(patchI);
+            const scalarField& tau = tt();
+
+            forAll(pp, faceI)
+            {
+                if (tau[faceI] == 0.0)
+                {
+                    includeAllFacesPerPatch[patchI].insert
+                    (
+                        faceI //pp.start()
+                    );
+                }
+            }
+        }
+    }
+
+    labelList triSurfaceToAgglom(5*nFaces);
+
+    triSurface localSurface = triangulate
+    (
+        includePatches,
+        includeAllFacesPerPatch
+    );
+
+    distributedTriSurfaceMesh surfacesMesh
+    (
+        IOobject
+        (
+            "opaqueSurface.stl",
+            mesh_.time().constant(),    // directory
+            "triSurface",               // instance
+            mesh_.time(),               // registry
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        localSurface,
+        dict
+    );
+
+    surfacesMesh.searchableSurface::write();
+
+    triSurfaceToAgglom.resize(surfacesMesh.size());
+
+    scalar maxBounding = 5.0*mag(mesh_.bounds().max() - mesh_.bounds().min());
+
+    reduce(maxBounding, maxOp<scalar>());
+
+    // Calculate index of faces which have a direct hit (local)
+    DynamicList<label> rayStartFace(nFaces + 0.01*nFaces);
+
+    // Shoot Rays
+    // * * * * * * * * * * * * * * * *
+    {
+
+        DynamicField<point> start(nFaces);
+        DynamicField<point> end(start.size());
+        DynamicList<label> startIndex(start.size());
+
+        label i = 0;
+        do
+        {
+            for (; i < Cfs.size(); i++)
+            {
+                const point& fc = Cfs[i];
+
+                const label myFaceId = hitFacesIds[i];
+
+                const vector d(direction_*maxBounding);
+
+                start.append(fc - SMALL*d);
+
+                startIndex.append(myFaceId);
+
+                end.append(fc - d);
+
+            }
+
+        }while (returnReduce(i < Cfs.size(), orOp<bool>()));
+
+        List<pointIndexHit> hitInfo(startIndex.size());
+        surfacesMesh.findLine(start, end, hitInfo);
+
+        // Collect the rays which has 'only one not wall' obstacle bettween
+        // start and end.
+        // If the ray hit itself get stored in dRayIs
+        forAll (hitInfo, rayI)
+        {
+            if (!hitInfo[rayI].hit())
+            {
+                rayStartFace.append(startIndex[rayI]);
+            }
+        }
+
+        // Plot all rays between visible faces.
+        if (debug)
+        {
+            writeRays
+            (
+                mesh_.time().path()/"allVisibleFaces.obj",
+                end,
+                Cfs
+            );
+        }
+
+        start.clear();
+        startIndex.clear();
+        end.clear();
+    }
+
+    rayStartFaces_.transfer(rayStartFace);
+
+    if (debug)
+    {
+        tmp<volScalarField> thitFaces
+        (
+            new volScalarField
+            (
+                IOobject
+                (
+                    "hitFaces",
+                    mesh_.time().timeName(),
+                    mesh_,
+                    IOobject::NO_READ,
+                    IOobject::NO_WRITE
+                ),
+                mesh_,
+                dimensionedScalar("zero", dimless, 0)
+            )
+        );
+
+        volScalarField& hitFaces = thitFaces();
+
+        hitFaces.boundaryField() = 0.0;
+        forAll (rayStartFaces_, i)
+        {
+            const label faceI = rayStartFaces_[i];
+            label patchID = patches.whichPatch(faceI);
+            const polyPatch& pp = patches[patchID];
+            hitFaces.boundaryField()[patchID][faceI - pp.start()] = 1.0;
+        }
+        hitFaces.write();
+    }
+
+    label totalHitFaces = rayStartFaces_.size();
+
+    reduce(totalHitFaces, sumOp<label>());
+
+    Info<< "Total number of hit faces : " <<  totalHitFaces << endl;
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::faceShading::faceShading
+(
+    const fvMesh& mesh,
+    const vector dir,
+    const labelList& hitFaceList
+)
+:
+    mesh_(mesh),
+    direction_(dir),
+    rayStartFaces_(hitFaceList)
+{}
+
+
+
+Foam::faceShading::faceShading
+(
+    const fvMesh& mesh,
+    const vector dir
+)
+:
+    mesh_(mesh),
+    direction_(dir),
+    rayStartFaces_(0)
+{
+    calculate();
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::faceShading::~faceShading()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::faceShading::correct()
+{
+    calculate();
+}
+
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.H b/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.H
new file mode 100644
index 0000000000..e096cb3ecd
--- /dev/null
+++ b/src/thermophysicalModels/radiation/radiationModels/solarLoad/faceShading/faceShading.H
@@ -0,0 +1,165 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::faceShading
+
+Description
+
+    faceShading uses the transmissivity value in the boundaryRadiationProperties
+    in order to evaluate which faces are "hit" by the "direction" vector.
+    NOTE: Only transmissivity values of zero are considered for opaque walls.
+
+SourceFiles
+    faceShading.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef faceShading_H
+#define faceShading_H
+
+#include "fvMesh.H"
+#include "Time.H"
+#include "meshTools.H"
+#include "DynamicField.H"
+#include "labelIOList.H"
+#include "wallPolyPatch.H"
+#include "triSurfaceTools.H"
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class faceShading Declaration
+\*---------------------------------------------------------------------------*/
+
+class faceShading
+{
+    // Private data
+
+        //- Reference to mesh
+        const fvMesh& mesh_;
+
+        //- Direction
+        vector direction_;
+
+        //- Faces directly hit by vector direction
+        labelList rayStartFaces_;
+
+
+    // Private members
+
+        //- Calculate ray start faces
+        void calculate();
+
+
+        //- Construct a triSurface from patches and faces on global local index
+        triSurface triangulate
+        (
+            const labelHashSet& includePatches,
+            const List<labelHashSet>& includeAllFaces
+        );
+
+        //- Write rays
+        void writeRays
+        (
+            const fileName& fName,
+            const DynamicField<point>& endCf,
+            const pointField& myFc
+        );
+
+        //- Disallow default bitwise copy construct
+        faceShading(const faceShading&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const faceShading&);
+
+
+public:
+
+    // Declare name of the class and its debug switch
+    ClassName("faceShading");
+
+
+    // Constructors
+
+        //- Construct from components
+        faceShading
+        (
+            const fvMesh& mesh,
+            const vector dir,
+            const labelList& hitFaceList
+        );
+
+        //- Construct from mesh and vector
+        faceShading
+        (
+            const fvMesh& mesh,
+            const vector
+        );
+
+
+    //- Destructor
+    ~faceShading();
+
+
+    // Member Functions
+
+        // Access
+
+            //- const acess to direction
+            const vector direction() const
+            {
+                return direction_;
+            }
+
+            //- Non-const access to direction
+            vector& direction()
+            {
+                return direction_;
+            }
+
+            //- Access to rayStartFaces
+            const labelList& rayStartFaces() const
+            {
+                return rayStartFaces_;
+            }
+
+
+        //- Recalculate rayStartFaces using direction vector
+        void correct();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/radiationModels/solarLoad/solarLoad.C b/src/thermophysicalModels/radiation/radiationModels/solarLoad/solarLoad.C
new file mode 100644
index 0000000000..469a33e1f5
--- /dev/null
+++ b/src/thermophysicalModels/radiation/radiationModels/solarLoad/solarLoad.C
@@ -0,0 +1,1043 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "solarLoad.H"
+#include "surfaceFields.H"
+#include "vectorList.H"
+#include "addToRunTimeSelectionTable.H"
+#include "boundaryRadiationProperties.H"
+#include "uniformDimensionedFields.H"
+#include "cyclicAMIPolyPatch.H"
+#include "mappedPatchBase.H"
+#include "wallPolyPatch.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace radiation
+    {
+        defineTypeNameAndDebug(solarLoad, 0);
+        addToRadiationRunTimeSelectionTables(solarLoad);
+    }
+}
+
+const Foam::word Foam::radiation::solarLoad::viewFactorWalls
+    = "viewFactorWall";
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+bool Foam::radiation::solarLoad::updateHitFaces()
+{
+    if (hitFaces_.empty())
+    {
+         hitFaces_.reset(new faceShading(mesh_, solarCalc_.direction()));
+         return true;
+    }
+    else
+    {
+        switch (solarCalc_.sunDirectionModel())
+        {
+            case solarCalculator::mSunDirConstant:
+            {
+                return false;
+                break;
+            }
+            case solarCalculator::mSunDirTraking:
+            {
+                label updateIndex = label
+                (
+                    mesh_.time().value()/solarCalc_.sunTrackingUpdateInterval()
+                );
+
+                if (updateIndex > updateTimeIndex_)
+                {
+                    Info << "Updating Sun position..." << endl;
+                    updateTimeIndex_ = updateIndex;
+                    solarCalc_.correctSunDirection();
+                    hitFaces_->direction() = solarCalc_.direction();
+                    hitFaces_->correct();
+                    return true;
+                    break;
+                }
+            }
+        }
+    }
+
+    return false;
+}
+
+
+void Foam::radiation::solarLoad::updateAbsorptivity
+(
+    const labelHashSet& includePatches
+)
+{
+    const boundaryRadiationProperties& boundaryRadiation =
+        boundaryRadiationProperties::New(mesh_);
+
+    forAllConstIter(labelHashSet, includePatches, iter)
+    {
+        const label patchID = iter.key();
+        absorptivity_[patchID].setSize(nBands_);
+        for (label bandI = 0; bandI < nBands_; bandI++)
+        {
+            absorptivity_[patchID][bandI] =
+                boundaryRadiation.absorptivity(patchID, bandI);
+        }
+    }
+}
+
+
+void Foam::radiation::solarLoad::updateDirectHitRadiation
+(
+    const labelList& hitFacesId,
+    const labelHashSet& includeMappedPatchBasePatches
+)
+{
+    const polyBoundaryMesh& patches = mesh_.boundaryMesh();
+    const scalarField& V = mesh_.V();
+
+    forAll (hitFacesId, i)
+    {
+        const label faceI = hitFacesId[i];
+        label patchID = patches.whichPatch(faceI);
+        const polyPatch& pp = patches[patchID];
+        const label localFaceI = faceI - pp.start();
+        const vector qPrim =
+              solarCalc_.directSolarRad()
+            * solarCalc_.direction();
+
+        if (includeMappedPatchBasePatches[patchID])
+        {
+            const vectorField n = pp.faceNormals();
+
+            for (label bandI = 0; bandI < nBands_; bandI++)
+            {
+                Qr_.boundaryField()[patchID][localFaceI] +=
+                    (qPrim & n[localFaceI])
+                  * spectralDistribution_[bandI]
+                  * absorptivity_[patchID][bandI]()[localFaceI];
+            }
+        }
+        else
+        {
+            const vectorField& sf = mesh_.Sf().boundaryField()[patchID];
+            const label cellI = pp.faceCells()[localFaceI];
+
+            for (label bandI = 0; bandI < nBands_; bandI++)
+            {
+                Ru_[cellI] +=
+                    (qPrim & sf[localFaceI])
+                  * spectralDistribution_[bandI]
+                  * absorptivity_[patchID][bandI]()[localFaceI]
+                  / V[cellI];
+            }
+        }
+    }
+}
+
+void Foam::radiation::solarLoad::updateSkyDiffusiveRadiation
+(
+    const labelHashSet& includePatches,
+    const labelHashSet& includeMappedPatchBasePatches
+)
+{
+    const polyBoundaryMesh& patches = mesh_.boundaryMesh();
+    const scalarField& V = mesh_.V();
+
+    switch(solarCalc_.sunLoadModel())
+    {
+        case solarCalculator::mSunLoadFairWeatherConditions:
+        case solarCalculator::mSunLoadTheoreticalMaximum:
+        {
+            forAllConstIter(labelHashSet, includePatches, iter)
+            {
+                const label patchID = iter.key();
+                const polyPatch& pp = patches[patchID];
+                const scalarField& sf = mesh_.magSf().boundaryField()[patchID];
+
+                const vectorField n = pp.faceNormals();
+                const labelList& cellIds = pp.faceCells();
+
+                forAll (n, faceI)
+                {
+                    const scalar cosEpsilon(verticalDir_ & -n[faceI]);
+
+                    scalar Ed(0.0);
+                    scalar Er(0.0);
+                    const scalar cosTheta(solarCalc_.direction() & -n[faceI]);
+
+                    {
+                        // Above the horizon
+                        if (cosEpsilon == 0.0)
+                        {
+                            // Vertical walls
+                            scalar Y(0);
+
+                            if (cosTheta > -0.2)
+                            {
+                                Y = 0.55+0.437*cosTheta + 0.313*sqr(cosTheta);
+                            }
+                            else
+                            {
+                                Y = 0.45;
+                            }
+
+                            Ed = solarCalc_.C()*Y*solarCalc_.directSolarRad();
+                        }
+                        else
+                        {
+                            //Other than vertical walls
+                            Ed =
+                                solarCalc_.C()
+                              * solarCalc_.directSolarRad()
+                              * (1.0 + cosEpsilon)/2.0;
+                        }
+
+                        // Ground reflected
+                        Er =
+                            solarCalc_.directSolarRad()
+                         * (solarCalc_.C() + Foam::sin(solarCalc_.beta()))
+                         * solarCalc_.groundReflectivity()
+                         * (1.0 - cosEpsilon)/2.0;
+                    }
+
+                    const label cellI = cellIds[faceI];
+                    if (includeMappedPatchBasePatches[patchID])
+                    {
+                        for (label bandI = 0; bandI < nBands_; bandI++)
+                        {
+                            Qr_.boundaryField()[patchID][faceI] +=
+                                (Ed + Er)
+                              * spectralDistribution_[bandI]
+                              * absorptivity_[patchID][bandI]()[faceI];
+                        }
+                    }
+                    else
+                    {
+                        for (label bandI = 0; bandI < nBands_; bandI++)
+                        {
+                            Ru_[cellI] +=
+                                  (Ed + Er)
+                                * spectralDistribution_[bandI]
+                                * absorptivity_[patchID][bandI]()[faceI]
+                                * sf[faceI]/V[cellI];
+                        }
+                    }
+                }
+            }
+        }
+        break;
+
+        case solarCalculator::mSunLoadConstant:
+        {
+            forAllConstIter(labelHashSet, includePatches, iter)
+            {
+                const label patchID = iter.key();
+                const polyPatch& pp = patches[patchID];
+                const scalarField& sf = mesh_.magSf().boundaryField()[patchID];
+
+                const labelList& cellIds = pp.faceCells();
+                forAll (pp, faceI)
+                {
+                    const label cellI = cellIds[faceI];
+                    if (includeMappedPatchBasePatches[patchID])
+                    {
+                        for (label bandI = 0; bandI < nBands_; bandI++)
+                        {
+                            Qr_.boundaryField()[patchID][faceI] +=
+                                solarCalc_.diffuseSolarRad()
+                              * spectralDistribution_[bandI]
+                              * absorptivity_[patchID][bandI]()[faceI];
+                        }
+                    }
+                    else
+                    {
+                        for (label bandI = 0; bandI < nBands_; bandI++)
+                        {
+                            Ru_[cellI] +=
+                                (
+                                    spectralDistribution_[bandI]
+                                  * absorptivity_[patchID][bandI]()[faceI]
+                                  * solarCalc_.diffuseSolarRad()
+                                )*sf[faceI]/V[cellI];
+                        }
+                    }
+                }
+            }
+            break;
+        }
+    }
+}
+
+
+void Foam::radiation::solarLoad::initialise(const dictionary& coeffs)
+{
+
+    if (coeffs.found("gridUp"))
+    {
+         coeffs.lookup("gridUp") >> verticalDir_;
+         verticalDir_ /= mag(verticalDir_);
+    }
+    else if (mesh_.foundObject<uniformDimensionedVectorField>("g"))
+    {
+        const uniformDimensionedVectorField& g =
+            mesh_.lookupObject<uniformDimensionedVectorField>("g");
+        verticalDir_ = (-g/mag(g)).value();
+    }
+
+    includePatches_ = mesh_.boundaryMesh().findIndices(viewFactorWalls);
+
+    coeffs.lookup("useVFbeamToDiffuse") >> useVFbeamToDiffuse_;
+
+    coeffs.lookup("spectralDistribution") >> spectralDistribution_;
+    spectralDistribution_ =
+        spectralDistribution_/sum(spectralDistribution_);
+
+    nBands_ = spectralDistribution_.size();
+
+    if (useVFbeamToDiffuse_)
+    {
+        map_.reset
+        (
+            new IOmapDistribute
+            (
+                IOobject
+                (
+                    "mapDist",
+                    mesh_.facesInstance(),
+                    mesh_,
+                    IOobject::MUST_READ,
+                    IOobject::NO_WRITE
+                )
+            )
+        );
+    }
+
+    if (coeffs.found("solidCoupled"))
+    {
+         coeffs.lookup("solidCoupled") >> solidCoupled_;
+    }
+
+    if (coeffs.found("wallCoupled"))
+    {
+         coeffs.lookup("wallCoupled") >> wallCoupled_;
+    }
+
+    if (coeffs.found("updateAbsorptivity"))
+    {
+        coeffs.lookup("updateAbsorptivity") >> updateAbsorptivity_;
+    }
+}
+
+
+void Foam::radiation::solarLoad::calculateQdiff
+(
+    const labelHashSet& includePatches,
+    const labelHashSet& includeMappedPatchBasePatches
+)
+{
+
+    scalarListIOList FmyProc
+    (
+        IOobject
+        (
+            "F",
+            mesh_.facesInstance(),
+            mesh_,
+            IOobject::MUST_READ,
+            IOobject::NO_WRITE,
+            false
+        )
+    );
+
+
+    if (finalAgglom_.size() > 0 && coarseMesh_.empty())
+    {
+        coarseMesh_.reset
+        (
+            new singleCellFvMesh
+            (
+                IOobject
+                (
+                    "coarse:" + mesh_.name(),
+                    mesh_.polyMesh::instance(),
+                    mesh_.time(),
+                    IOobject::NO_READ,
+                    IOobject::NO_WRITE
+                ),
+                mesh_,
+                finalAgglom_
+            )
+        );
+    }
+
+    label nLocalVFCoarseFaces = 0;
+    forAll(includePatches_, i)
+    {
+        const label patchI = includePatches_[i];
+        nLocalVFCoarseFaces +=
+            coarseMesh_->boundaryMesh()[patchI].size();
+    }
+
+    label totalFVNCoarseFaces = nLocalVFCoarseFaces;
+    reduce(totalFVNCoarseFaces, sumOp<label>());
+
+    // Calculate weighted absorptivity on coarse patches
+    List<scalar> localCoarseRave(nLocalVFCoarseFaces);
+    List<scalar> localCoarsePartialArea(nLocalVFCoarseFaces);
+    List<vector> localCoarseNorm(nLocalVFCoarseFaces);
+
+    scalarField compactCoarseRave(map_->constructSize(), 0.0);
+    scalarField compactCoarsePartialArea(map_->constructSize(), 0.0);
+    vectorList compactCoarseNorm(map_->constructSize(), vector::zero);
+
+    const boundaryRadiationProperties& boundaryRadiation =
+        boundaryRadiationProperties::New(mesh_);
+
+    coarseToFine_.setSize(includePatches_.size());
+
+    const labelList& hitFacesId = hitFaces_->rayStartFaces();
+
+    label startI = 0;
+    label compactI = 0;
+    forAll (includePatches_, i)
+    {
+        const label patchID = includePatches_[i];
+        const polyPatch& pp = mesh_.boundaryMesh()[patchID];
+
+        const polyPatch& cpp = coarseMesh_->boundaryMesh()[patchID];
+
+        const labelList& agglom = finalAgglom_[patchID];
+        //if (pp.size() > 0)
+        if (agglom.size() > 0)
+        {
+            label nAgglom = max(agglom) + 1;
+            coarseToFine_[i] = invertOneToMany(nAgglom, agglom);
+        }
+
+        scalarField r(pp.size(), 0.0);
+        for (label bandI = 0; bandI < nBands_; bandI++)
+        {
+            const tmp<scalarField> tr =
+               spectralDistribution_[bandI]
+              *boundaryRadiation.reflectivity(patchID, bandI);
+            r += tr();
+        }
+
+        scalarList Rave(cpp.size(), 0.0);
+        scalarList area(cpp.size(), 0.0);
+
+        const scalarField& sf = mesh_.magSf().boundaryField()[patchID];
+
+        const labelList& coarsePatchFace =
+            coarseMesh_->patchFaceMap()[patchID];
+
+        forAll (cpp, coarseI)
+        {
+            const label coarseFaceID = coarsePatchFace[coarseI];
+            const labelList& fineFaces =
+                coarseToFine_[i][coarseFaceID];
+
+            UIndirectList<scalar> fineSf
+            (
+                sf,
+                fineFaces
+            );
+            scalar fineArea = sum(fineSf());
+
+            scalar fullArea = 0.0;
+            forAll(fineFaces, j)
+            {
+                label faceI = fineFaces[j];
+                label globalFaceI = faceI + pp.start();
+
+                if (findIndex(hitFacesId, globalFaceI) != -1)
+                {
+                    fullArea += sf[faceI];
+                }
+                Rave[coarseI] += (r[faceI]*sf[faceI])/fineArea;
+            }
+            localCoarsePartialArea[compactI++] = fullArea/fineArea;
+        }
+
+        SubList<scalar>
+        (
+            localCoarseRave,
+            Rave.size(),
+            startI
+        ).assign(Rave);
+
+
+        const vectorList coarseNSf = cpp.faceNormals();
+        SubList<vector>
+        (
+            localCoarseNorm,
+            cpp.size(),
+            startI
+        ).assign(coarseNSf);
+        startI += cpp.size();
+    }
+
+
+     SubList<scalar>(compactCoarsePartialArea, nLocalVFCoarseFaces).assign
+     (
+         localCoarsePartialArea
+     );
+
+     SubList<scalar>(compactCoarseRave, nLocalVFCoarseFaces).assign
+     (
+         localCoarseRave
+     );
+
+     SubList<vector>(compactCoarseNorm, nLocalVFCoarseFaces).assign
+     (
+         localCoarseNorm
+     );
+
+     map_->distribute(compactCoarsePartialArea);
+     map_->distribute(compactCoarseRave);
+     map_->distribute(compactCoarseNorm);
+
+
+    // Calculate coarse hitFaces and Sun direct hit heat fluxes
+    scalarList localqDiffusive(nLocalVFCoarseFaces, 0.0);
+
+    label locaFaceI = 0;
+    forAll (includePatches_, i)
+    {
+        const label patchID = includePatches_[i];
+        const polyPatch& pp = coarseMesh_->boundaryMesh()[patchID];
+        const polyPatch& ppf = mesh_.boundaryMesh()[patchID];
+
+        const labelList& coarsePatchFace =
+            coarseMesh_->patchFaceMap()[patchID];
+        const scalarField& sf = mesh_.magSf().boundaryField()[patchID];
+
+        scalarField a(ppf.size(), 0.0);
+        for (label bandI = 0; bandI < nBands_; bandI++)
+        {
+            const tmp<scalarField> ta =
+                spectralDistribution_[bandI]
+              * absorptivity_[patchID][bandI]();
+            a += ta();
+        }
+
+        forAll (pp, coarseI)
+        {
+            const label coarseFaceID = coarsePatchFace[coarseI];
+            const labelList& fineFaces = coarseToFine_[i][coarseFaceID];
+            UIndirectList<scalar> fineSf
+            (
+                sf,
+                fineFaces
+            );
+            scalar fineArea = sum(fineSf());
+
+            scalar aAve = 0.0;
+            forAll(fineFaces, j)
+            {
+                label faceI = fineFaces[j];
+                aAve += (a[faceI]*sf[faceI])/fineArea;
+            }
+
+            const scalarList& vf = FmyProc[locaFaceI];
+
+            const labelList& compactFaces = visibleFaceFaces_[locaFaceI];
+
+
+            forAll (compactFaces, j)
+            {
+                label compactI = compactFaces[j];
+
+                localqDiffusive[locaFaceI] +=
+                      compactCoarsePartialArea[compactI]
+                    * aAve
+                    * (solarCalc_.directSolarRad()*solarCalc_.direction())
+                    & compactCoarseNorm[compactI]
+                    * vf[j]
+                    * compactCoarseRave[compactI];
+
+            }
+            locaFaceI++;
+        }
+    }
+
+    // Fill QsecondRad_
+    label compactId = 0;
+    forAll (includePatches_, i)
+    {
+        const label patchID = includePatches_[i];
+        const polyPatch& pp = coarseMesh_->boundaryMesh()[patchID];
+
+        if (pp.size() > 0)
+        {
+            scalarField& Qrp = QsecondRad_.boundaryField()[patchID];
+
+            const labelList& coarsePatchFace =
+                coarseMesh_->patchFaceMap()[patchID];
+
+            forAll(pp, coarseI)
+            {
+                const label coarseFaceID = coarsePatchFace[coarseI];
+                const labelList& fineFaces = coarseToFine_[i][coarseFaceID];
+                forAll(fineFaces, k)
+                {
+                    label faceI = fineFaces[k];
+                    Qrp[faceI] = localqDiffusive[compactId];
+                }
+                compactId ++;
+            }
+        }
+    }
+
+    const scalarField& V = mesh_.V();
+    const polyBoundaryMesh& patches = mesh_.boundaryMesh();
+
+    forAllConstIter(labelHashSet, includePatches, iter)
+    {
+        const label patchID = iter.key();
+        const scalarField& qSecond = QsecondRad_.boundaryField()[patchID];
+        if (includeMappedPatchBasePatches[patchID])
+        {
+            Qr_.boundaryField()[patchID] += qSecond;
+        }
+        else
+        {
+            const polyPatch& pp = patches[patchID];
+            const labelList& cellIds = pp.faceCells();
+            const scalarField& sf = mesh_.magSf().boundaryField()[patchID];
+            forAll (pp, faceI)
+            {
+                const label cellI = cellIds[faceI];
+                Ru_[cellI] += qSecond[faceI]*sf[faceI]/V[cellI];
+            }
+        }
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::radiation::solarLoad::solarLoad(const volScalarField& T)
+:
+    radiationModel(typeName, T),
+    finalAgglom_
+    (
+        IOobject
+        (
+            "finalAgglom",
+            mesh_.facesInstance(),
+            mesh_,
+            IOobject::READ_IF_PRESENT,
+            IOobject::NO_WRITE,
+            false
+        )
+    ),
+    coarseMesh_(),
+    Qr_
+    (
+        IOobject
+        (
+            "Qr",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::READ_IF_PRESENT,
+            IOobject::AUTO_WRITE
+        ),
+        mesh_,
+        dimensionedScalar("Qr", dimMass/pow3(dimTime), 0.0)
+    ),
+    QsecondRad_
+    (
+        IOobject
+        (
+            "QsecondRad",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::NO_READ,
+            IOobject::AUTO_WRITE
+        ),
+        mesh_,
+        dimensionedScalar("QsecondRad", dimMass/pow3(dimTime), 0.0)
+    ),
+    hitFaces_(),
+    Ru_
+    (
+        IOobject
+        (
+            "Ru",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        mesh_,
+        dimensionedScalar("Ru", dimMass/dimLength/pow3(dimTime), 0.0)
+    ),
+    solarCalc_(this->subDict(typeName + "Coeffs"), mesh_),
+    verticalDir_(vector::zero),
+    useVFbeamToDiffuse_(false),
+    includePatches_(mesh_.boundary().size(), -1),
+    coarseToFine_(),
+    nBands_(1),
+    spectralDistribution_(nBands_),
+    map_(),
+    visibleFaceFaces_
+    (
+        IOobject
+        (
+            "visibleFaceFaces",
+            mesh_.facesInstance(),
+            mesh_,
+            IOobject::READ_IF_PRESENT,
+            IOobject::NO_WRITE,
+            false
+        )
+    ),
+    solidCoupled_(true),
+    absorptivity_(mesh_.boundaryMesh().size()),
+    updateAbsorptivity_(false),
+    firstIter_(true),
+    updateTimeIndex_(0)
+{
+    initialise(coeffs_);
+}
+
+
+Foam::radiation::solarLoad::solarLoad
+(
+    const dictionary& dict,
+    const volScalarField& T
+)
+:
+    radiationModel(typeName, dict, T),
+    finalAgglom_
+    (
+        IOobject
+        (
+            "finalAgglom",
+            mesh_.facesInstance(),
+            mesh_,
+            IOobject::READ_IF_PRESENT,
+            IOobject::NO_WRITE,
+            false
+        )
+    ),
+    coarseMesh_(),
+    Qr_
+    (
+        IOobject
+        (
+            "Qr",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::READ_IF_PRESENT,
+            IOobject::AUTO_WRITE
+        ),
+        mesh_,
+        dimensionedScalar("Qr", dimMass/pow3(dimTime), 0.0)
+    ),
+    QsecondRad_
+    (
+        IOobject
+        (
+            "QsecondRad",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::NO_READ,
+            IOobject::AUTO_WRITE
+        ),
+        mesh_,
+        dimensionedScalar("QsecondRad", dimMass/pow3(dimTime), 0.0)
+    ),
+    hitFaces_(),
+    Ru_
+    (
+        IOobject
+        (
+            "Ru",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        mesh_,
+        dimensionedScalar("Ru", dimMass/dimLength/pow3(dimTime), 0.0)
+    ),
+    solarCalc_(coeffs_, mesh_),
+    verticalDir_(vector::zero),
+    useVFbeamToDiffuse_(false),
+    includePatches_(mesh_.boundary().size(), -1),
+    coarseToFine_(),
+    nBands_(1),
+    spectralDistribution_(nBands_),
+    map_(),
+    visibleFaceFaces_
+    (
+        IOobject
+        (
+            "visibleFaceFaces",
+            mesh_.facesInstance(),
+            mesh_,
+            IOobject::READ_IF_PRESENT,
+            IOobject::NO_WRITE,
+            false
+        )
+    ),
+    solidCoupled_(true),
+    wallCoupled_(false),
+    absorptivity_(mesh_.boundaryMesh().size()),
+    updateAbsorptivity_(false),
+    firstIter_(true),
+    updateTimeIndex_(0)
+{
+    initialise(coeffs_);
+}
+
+
+Foam::radiation::solarLoad::solarLoad
+(
+    const dictionary& dict,
+    const volScalarField& T,
+    const word radWallFieldName
+)
+:
+    radiationModel("none", T),
+    finalAgglom_
+    (
+        IOobject
+        (
+            "finalAgglom",
+            mesh_.facesInstance(),
+            mesh_,
+            IOobject::READ_IF_PRESENT,
+            IOobject::NO_WRITE,
+            false
+        )
+    ),
+    coarseMesh_(),
+    Qr_
+    (
+        IOobject
+        (
+            radWallFieldName,
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::READ_IF_PRESENT,
+            IOobject::AUTO_WRITE
+        ),
+        mesh_,
+        dimensionedScalar("Qr", dimMass/pow3(dimTime), 0.0)
+    ),
+    QsecondRad_
+    (
+        IOobject
+        (
+            "QsecondRad",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::NO_READ,
+            IOobject::AUTO_WRITE
+        ),
+        mesh_,
+        dimensionedScalar("QsecondRad", dimMass/pow3(dimTime), 0.0)
+    ),
+    hitFaces_(),
+    Ru_
+    (
+        IOobject
+        (
+            "Ru",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        mesh_,
+        dimensionedScalar("Ru", dimMass/dimLength/pow3(dimTime), 0.0)
+    ),
+    solarCalc_(dict, mesh_),
+    verticalDir_(vector::zero),
+    useVFbeamToDiffuse_(false),
+    includePatches_(mesh_.boundary().size(), -1),
+    coarseToFine_(),
+    nBands_(1),
+    spectralDistribution_(nBands_),
+    map_(),
+    visibleFaceFaces_
+    (
+        IOobject
+        (
+            "visibleFaceFaces",
+            mesh_.facesInstance(),
+            mesh_,
+            IOobject::READ_IF_PRESENT,
+            IOobject::NO_WRITE,
+            false
+        )
+    ),
+    solidCoupled_(true),
+    wallCoupled_(false),
+    absorptivity_(mesh_.boundaryMesh().size()),
+    updateAbsorptivity_(false),
+    firstIter_(true)
+{
+    initialise(dict);
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::radiation::solarLoad::~solarLoad()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+Foam::label  Foam::radiation::solarLoad::nBands() const
+{
+    return nBands_;
+}
+
+
+bool Foam::radiation::solarLoad::read()
+{
+    if (radiationModel::read())
+    {
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
+
+void Foam::radiation::solarLoad::calculate()
+{
+    const polyBoundaryMesh& patches = mesh_.boundaryMesh();
+    labelHashSet includePatches;
+    forAll(patches, patchI)
+    {
+        const polyPatch& pp = patches[patchI];
+        if (!pp.coupled() && !isA<cyclicAMIPolyPatch>(pp))
+        {
+            includePatches.insert(patchI);
+        }
+    }
+
+    labelHashSet includeMappedPatchBasePatches;
+    forAll(patches, patchI)
+    {
+        const polyPatch& pp = patches[patchI];
+        if
+        (
+            (isA<mappedPatchBase>(pp) && solidCoupled_)
+         || (isA<wallPolyPatch>(pp) && wallCoupled_)
+        )
+        {
+            includeMappedPatchBasePatches.insert(patchI);
+        }
+    }
+
+    if (updateAbsorptivity_ || firstIter_)
+    {
+        updateAbsorptivity(includePatches);
+    }
+
+    bool facesChanged = updateHitFaces();
+
+    if (facesChanged)
+    {
+        // Reset Ru and Qr
+        Ru_ = dimensionedScalar("Ru", dimMass/dimLength/pow3(dimTime), 0.0);
+        Qr_.boundaryField() = 0.0;
+
+        // Add direct hit radation
+        const labelList& hitFacesId = hitFaces_->rayStartFaces();
+        updateDirectHitRadiation(hitFacesId, includeMappedPatchBasePatches);
+
+        // Add sky diffusive radiation
+        updateSkyDiffusiveRadiation
+        (
+            includePatches,
+            includeMappedPatchBasePatches
+        );
+
+        // Add indirect diffusive radiation
+        if (useVFbeamToDiffuse_)
+        {
+            calculateQdiff(includePatches, includeMappedPatchBasePatches);
+        }
+
+        firstIter_ = false;
+    }
+
+    if (debug)
+    {
+        if (mesh_.time().outputTime())
+        {
+            Ru_.write();
+        }
+    }
+}
+
+
+Foam::tmp<Foam::volScalarField> Foam::radiation::solarLoad::Rp() const
+{
+    return tmp<volScalarField>
+    (
+        new volScalarField
+        (
+            IOobject
+            (
+                "Rp",
+                mesh_.time().timeName(),
+                mesh_,
+                IOobject::NO_READ,
+                IOobject::NO_WRITE,
+                false
+            ),
+            mesh_,
+            dimensionedScalar
+            (
+                "zero",
+                dimMass/pow3(dimTime)/dimLength/pow4(dimTemperature),
+                0.0
+            )
+        )
+    );
+}
+
+
+Foam::tmp<Foam::DimensionedField<Foam::scalar, Foam::volMesh> >
+Foam::radiation::solarLoad::Ru() const
+{
+    return Ru_;
+}
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/radiationModels/solarLoad/solarLoad.H b/src/thermophysicalModels/radiation/radiationModels/solarLoad/solarLoad.H
new file mode 100644
index 0000000000..ee24701171
--- /dev/null
+++ b/src/thermophysicalModels/radiation/radiationModels/solarLoad/solarLoad.H
@@ -0,0 +1,255 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::radiation::solarLoad
+
+Description
+
+    The solar load radiation model includes Sun primary hits, their
+    reflective fluxes and diffusive sky radiative fluxes.
+
+    The primary hit rays are calculated using a face shading algorithm.
+    The reflected fluxes are considered diffusive and use a view factors method
+    to deposit the energy on "visible" walls. The sky diffusive radiation for
+    horizontal and vertical walls is calculated following the Fair Weather
+    Conditions Method from the ASHRAE Handbook.
+
+    By default the energy is included in cells adjacent to the patches into
+    the energy Equation (wallCoupled = false). On coupled patches the flux is
+    by default added to the wall and considered into the solid
+    (solidCoupled = true).
+
+    The reflected fluxes uses a grey absoprtion/emission model wich is weighted
+    by the spectral distribution. The flag useVFbeamToDiffuse should be
+    switched on and the view factors should be calculated using the
+    'viewFactorsGen' application.
+
+    The solarLoad model can be used in conjuntion with fvDOM and viewFactor
+    radiation models but only using a single band spectrum. On the
+    corresponding BC's for these models the flag "solarLoad" must be set to
+    true.
+
+
+SourceFiles
+    solarLoad.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef radiationModelsolarLoad_H
+#define radiationModelsolarLoad_H
+
+#include "radiationModel.H"
+#include "singleCellFvMesh.H"
+#include "scalarListIOList.H"
+#include "volFields.H"
+#include "faceShading.H"
+#include "solarCalculator.H"
+#include "IOmapDistribute.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace radiation
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class solarLoad Declaration
+\*---------------------------------------------------------------------------*/
+
+class solarLoad
+:
+    public radiationModel
+{
+protected:
+
+    // Static data
+
+        //- Static name for view factor walls
+        static const word viewFactorWalls;
+
+
+private:
+
+    // Private data
+
+
+        //- Agglomeration List
+        labelListIOList finalAgglom_;
+
+        //- Coarse mesh
+        autoPtr<singleCellFvMesh> coarseMesh_;
+
+        //- Net radiative heat flux [W/m2]
+        volScalarField Qr_;
+
+        //- Secondary solar radiative heat flux [W/m2]
+        volScalarField QsecondRad_;
+
+        //- Direct hit faces Ids
+        autoPtr<faceShading> hitFaces_;
+
+        //- Constant source term
+        DimensionedField<scalar, volMesh> Ru_;
+
+        //- Solar calculator
+        solarCalculator solarCalc_;
+
+        //- Vertical direction (Default is g vector)
+        vector verticalDir_;
+
+        //- Include diffuse reflected heat fluxes from direct heat flux
+        bool useVFbeamToDiffuse_;
+
+        //- Selected patches to apply solar load
+        labelList includePatches_;
+
+        //- Chached coarse to fine mapping for coarse mesh
+        List<labelListList> coarseToFine_;
+
+        //-Number of bands
+        label nBands_;
+
+        //- Spectral distribution for the integrated solar heat flux
+        scalarList spectralDistribution_;
+
+        //- Map distribute
+        autoPtr<IOmapDistribute> map_;
+
+        //- Face-compact map
+        labelListIOList visibleFaceFaces_;
+
+        //- Couple solids through mapped boundary patch using Qr (default:true)
+        bool solidCoupled_;
+
+        //- Couple wall patches using Qr (default:false)
+        bool wallCoupled_;
+
+        //- Absorptivity list
+        List<List<tmp<scalarField> > > absorptivity_;
+
+        //- Update absorptivity
+        bool updateAbsorptivity_;
+
+        //- First iteration
+        bool firstIter_;
+
+        //- Update Sun position index
+        label updateTimeIndex_;
+
+
+    // Private Member Functions
+
+
+        //- Initialise
+        void initialise(const dictionary&);
+
+        //- Update direct hit faces radiation
+        void updateDirectHitRadiation(const labelList&, const labelHashSet&);
+
+        //- Calculate diffusive heat flux
+        void calculateQdiff(const labelHashSet&, const labelHashSet&);
+
+        //- Update Sky diffusive radiation
+        void updateSkyDiffusiveRadiation
+        (
+            const labelHashSet&,
+            const labelHashSet&
+        );
+
+        //- Update hit faces
+        bool updateHitFaces();
+
+        //- Update absorptivity
+        void updateAbsorptivity(const labelHashSet& includePatches);
+
+        //- Disallow default bitwise copy construct
+        solarLoad(const solarLoad&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const solarLoad&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("solarLoad");
+
+
+    // Constructors
+
+        //- Construct from volScalarField
+        solarLoad(const volScalarField& T);
+
+        //- Construct from dictionary and volScalarField
+        solarLoad(const dictionary& dict, const volScalarField& T);
+
+        //- Constructor from local components. Does not create a radiationModel.
+        //  radWallFieldName is the solar heat field name
+        solarLoad
+        (
+            const dictionary& dict,
+            const volScalarField& T,
+            const word radWallFieldName
+        );
+
+
+    //- Destructor
+    virtual ~solarLoad();
+
+
+    // Member functions
+
+        // Edit
+
+            //- Solve
+            void calculate();
+
+            //- Read radiation properties dictionary
+            bool read();
+
+            //- Source term component (for power of T^4)
+            virtual tmp<volScalarField> Rp() const;
+
+            //- Source term component (constant)
+            virtual tmp<DimensionedField<scalar, volMesh> > Ru() const;
+
+
+    // Access
+
+        //- Number of bands
+        label nBands() const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace radiation
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/radiationModels/viewFactor/viewFactor.C b/src/thermophysicalModels/radiation/radiationModels/viewFactor/viewFactor.C
index c28faa6cda..46c8e717a0 100644
--- a/src/thermophysicalModels/radiation/radiationModels/viewFactor/viewFactor.C
+++ b/src/thermophysicalModels/radiation/radiationModels/viewFactor/viewFactor.C
@@ -29,6 +29,7 @@ License
 #include "greyDiffusiveViewFactorFixedValueFvPatchScalarField.H"
 #include "typeInfo.H"
 #include "addToRunTimeSelectionTable.H"
+#include "boundaryRadiationProperties.H"
 
 using namespace Foam::constant;
 
@@ -43,30 +44,22 @@ namespace Foam
     }
 }
 
+const Foam::word Foam::radiation::viewFactor::viewFactorWalls
+    = "viewFactorWall";
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
 void Foam::radiation::viewFactor::initialise()
 {
     const polyBoundaryMesh& coarsePatches = coarseMesh_.boundaryMesh();
-    const volScalarField::GeometricBoundaryField& Qrp = Qr_.boundaryField();
 
-    label count = 0;
-    forAll(Qrp, patchI)
+    selectedPatches_ = mesh_.boundaryMesh().findIndices(viewFactorWalls);
+    forAll(selectedPatches_, i)
     {
-        //const polyPatch& pp = mesh_.boundaryMesh()[patchI];
-        const fvPatchScalarField& QrPatchI = Qrp[patchI];
-
-        if ((isA<fixedValueFvPatchScalarField>(QrPatchI)))
-        {
-            selectedPatches_[count] = QrPatchI.patch().index();
-            nLocalCoarseFaces_ += coarsePatches[patchI].size();
-            count++;
-        }
+        const label patchI = selectedPatches_[i];
+        nLocalCoarseFaces_ += coarsePatches[patchI].size();
     }
 
-    selectedPatches_.resize(count--);
-
     if (debug)
     {
         Pout<< "radiation::viewFactor::initialise() Selected patches:"
@@ -84,52 +77,19 @@ void Foam::radiation::viewFactor::initialise()
             << "Total number of clusters : " << totalNCoarseFaces_ << endl;
     }
 
-    labelListIOList subMap
-    (
-        IOobject
-        (
-            "subMap",
-            mesh_.facesInstance(),
-            mesh_,
-            IOobject::MUST_READ,
-            IOobject::NO_WRITE,
-            false
-        )
-    );
-
-    labelListIOList constructMap
-    (
-        IOobject
-        (
-            "constructMap",
-            mesh_.facesInstance(),
-            mesh_,
-            IOobject::MUST_READ,
-            IOobject::NO_WRITE,
-            false
-        )
-    );
-
-    IOList<label> consMapDim
-    (
-        IOobject
-        (
-            "constructMapDim",
-            mesh_.facesInstance(),
-            mesh_,
-            IOobject::MUST_READ,
-            IOobject::NO_WRITE,
-            false
-        )
-    );
-
     map_.reset
     (
-        new mapDistribute
+        new IOmapDistribute
         (
-            consMapDim[0],
-            Xfer<labelListList>(subMap),
-            Xfer<labelListList>(constructMap)
+            IOobject
+            (
+                "mapDist",
+                mesh_.facesInstance(),
+                mesh_,
+                IOobject::MUST_READ,
+                IOobject::NO_WRITE,
+                false
+            )
         )
     );
 
@@ -235,6 +195,33 @@ void Foam::radiation::viewFactor::initialise()
             pivotIndices_.setSize(CLU_().n());
         }
     }
+
+    if (this->found("useSolarLoad"))
+    {
+        this->lookup("useSolarLoad") >> useSolarLoad_;
+    }
+
+    if (useSolarLoad_)
+    {
+        const dictionary& solarDict = this->subDict("solarLoarCoeffs");
+        solarLoad_.reset
+        (
+            new solarLoad(solarDict, T_, externalRadHeatFieldName_)
+        );
+
+        if (solarLoad_->nBands() > 1)
+        {
+            FatalErrorIn
+            (
+                "const Foam::radiation::viewFactor::initialise()"
+            )
+                << "Requested solar radiation with fvDOM. Using "
+                << "more thant one band for the solar load is not allowed"
+                << abort(FatalError);
+            }
+
+        Info<< "Creating Solar Load Model " << nl;
+    }
 }
 
 
@@ -260,7 +247,7 @@ Foam::radiation::viewFactor::viewFactor(const volScalarField& T)
     (
         IOobject
         (
-            mesh_.name(),
+            "coarse:" + mesh_.name(),
             mesh_.polyMesh::instance(),
             mesh_.time(),
             IOobject::NO_READ,
@@ -288,7 +275,9 @@ Foam::radiation::viewFactor::viewFactor(const volScalarField& T)
     nLocalCoarseFaces_(0),
     constEmissivity_(false),
     iterCounter_(0),
-    pivotIndices_(0)
+    pivotIndices_(0),
+    useSolarLoad_(false),
+    solarLoad_()
 {
     initialise();
 }
@@ -318,7 +307,7 @@ Foam::radiation::viewFactor::viewFactor
     (
         IOobject
         (
-            mesh_.name(),
+            "coarse:" + mesh_.name(),
             mesh_.polyMesh::instance(),
             mesh_.time(),
             IOobject::NO_READ,
@@ -346,7 +335,9 @@ Foam::radiation::viewFactor::viewFactor
     nLocalCoarseFaces_(0),
     constEmissivity_(false),
     iterCounter_(0),
-    pivotIndices_(0)
+    pivotIndices_(0),
+    useSolarLoad_(false),
+    solarLoad_()
 {
     initialise();
 }
@@ -401,6 +392,11 @@ void Foam::radiation::viewFactor::calculate()
     // Store previous iteration
     Qr_.storePrevIter();
 
+    if (useSolarLoad_)
+    {
+        solarLoad_->calculate();
+    }
+
     scalarField compactCoarseT(map_->constructSize(), 0.0);
     scalarField compactCoarseE(map_->constructSize(), 0.0);
     scalarField compactCoarseHo(map_->constructSize(), 0.0);
@@ -412,6 +408,9 @@ void Foam::radiation::viewFactor::calculate()
     DynamicList<scalar> localCoarseEave(nLocalCoarseFaces_);
     DynamicList<scalar> localCoarseHoave(nLocalCoarseFaces_);
 
+    const boundaryRadiationProperties& boundaryRadiation =
+        boundaryRadiationProperties::New(mesh_);
+
     forAll(selectedPatches_, i)
     {
         label patchID = selectedPatches_[i];
@@ -427,9 +426,11 @@ void Foam::radiation::viewFactor::calculate()
                 greyDiffusiveViewFactorFixedValueFvPatchScalarField
             >(QrPatch);
 
-        const scalarList eb = Qrp.emissivity();
+        const tmp<scalarField> teb = boundaryRadiation.emissivity(patchID);
+        const scalarField& eb = teb();
 
-        const scalarList& Hoi = Qrp.Qro();
+        const tmp<scalarField> tHoi = Qrp.Qro();
+        const scalarField& Hoi = tHoi();
 
         const polyPatch& pp = coarseMesh_.boundaryMesh()[patchID];
         const labelList& coarsePatchFace = coarseMesh_.patchFaceMap()[patchID];
diff --git a/src/thermophysicalModels/radiation/radiationModels/viewFactor/viewFactor.H b/src/thermophysicalModels/radiation/radiationModels/viewFactor/viewFactor.H
index dc6c612516..bbeb69b7ed 100644
--- a/src/thermophysicalModels/radiation/radiationModels/viewFactor/viewFactor.H
+++ b/src/thermophysicalModels/radiation/radiationModels/viewFactor/viewFactor.H
@@ -50,8 +50,9 @@ SourceFiles
 #include "scalarMatrices.H"
 #include "globalIndex.H"
 #include "scalarListIOList.H"
-#include "mapDistribute.H"
 #include "volFields.H"
+#include "IOmapDistribute.H"
+#include "solarLoad.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -68,13 +69,21 @@ class viewFactor
 :
     public radiationModel
 {
+protected:
+
+// Static data
+
+    //- Static name for view factor walls
+    static const word viewFactorWalls;
+
+
     // Private data
 
         //- Agglomeration List
         labelListIOList finalAgglom_;
 
         //- Map distributed
-        autoPtr<mapDistribute> map_;
+        autoPtr<IOmapDistribute> map_;
 
         //- Coarse mesh
         singleCellFvMesh coarseMesh_;
@@ -106,6 +115,12 @@ class viewFactor
         //- Pivot Indices for LU decomposition
         labelList pivotIndices_;
 
+        //- Use Solar Load model
+        bool useSolarLoad_;
+
+        //- Solar load radiation model
+        autoPtr<solarLoad> solarLoad_;
+
 
     // Private Member Functions
 
diff --git a/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanSolidAbsorptionEmission/greyMeanSolidAbsorptionEmission.C b/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanSolidAbsorptionEmission/greyMeanSolidAbsorptionEmission.C
index b2775f3149..f6c424d762 100644
--- a/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanSolidAbsorptionEmission/greyMeanSolidAbsorptionEmission.C
+++ b/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanSolidAbsorptionEmission/greyMeanSolidAbsorptionEmission.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -26,8 +26,6 @@ License
 #include "greyMeanSolidAbsorptionEmission.H"
 #include "addToRunTimeSelectionTable.H"
 #include "unitConversion.H"
-#include "zeroGradientFvPatchFields.H"
-
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
diff --git a/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanSolidAbsorptionEmission/greyMeanSolidAbsorptionEmission.H b/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanSolidAbsorptionEmission/greyMeanSolidAbsorptionEmission.H
index 09a6df1c99..4ea4d1e5f5 100644
--- a/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanSolidAbsorptionEmission/greyMeanSolidAbsorptionEmission.H
+++ b/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanSolidAbsorptionEmission/greyMeanSolidAbsorptionEmission.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -26,20 +26,7 @@ Class
 
 Description
     greyMeanSolidAbsorptionEmission radiation absorption and emission
-    coefficients for continuous phase
-
-    The coefficients for the species in the Look up table have to be specified
-    for use in moles x P [atm], i.e. (k[i] = species[i]*p*9.869231e-6).
-
-    The coefficients for CO and soot or any other added are multiplied by the
-    respective mass fraction being solved
-
-    All the species in the dictionary need either to be in the look-up table or
-    being solved. Conversely, all the species solved do not need to be included
-    in the calculation of the absorption coefficient
-
-    The names of the species in the absorption dictionary must match exactly the
-    name in the look-up table or the name of the field being solved
+    coefficients for solid mixture
 
 SourceFiles
     greyMeanSolidAbsorptionEmission.C
@@ -52,6 +39,7 @@ SourceFiles
 #include "absorptionEmissionModel.H"
 #include "solidThermo.H"
 #include "basicSpecieMixture.H"
+#include "zeroGradientFvPatchFields.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
diff --git a/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/multiBandSolidAbsorptionEmission/multiBandSolidAbsorptionEmission.C b/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/multiBandSolidAbsorptionEmission/multiBandSolidAbsorptionEmission.C
new file mode 100644
index 0000000000..31942309d9
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/multiBandSolidAbsorptionEmission/multiBandSolidAbsorptionEmission.C
@@ -0,0 +1,158 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "multiBandSolidAbsorptionEmission.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace radiation
+    {
+        defineTypeNameAndDebug(multiBandSolidAbsorptionEmission, 0);
+
+        addToRunTimeSelectionTable
+        (
+            absorptionEmissionModel,
+            multiBandSolidAbsorptionEmission,
+            dictionary
+        );
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::radiation::multiBandSolidAbsorptionEmission::
+multiBandSolidAbsorptionEmission
+(
+    const dictionary& dict,
+    const fvMesh& mesh
+)
+:
+    absorptionEmissionModel(dict, mesh),
+    coeffsDict_(dict.subDict(typeName + "Coeffs")),
+    absCoeffs_(maxBands_),
+    emiCoeffs_(maxBands_),
+    nBands_(0)
+{
+    coeffsDict_.lookup("absorptivity") >> absCoeffs_;
+    coeffsDict_.lookup("emissivity") >> emiCoeffs_;
+    nBands_ = absCoeffs_.size();
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::radiation::multiBandSolidAbsorptionEmission::
+~multiBandSolidAbsorptionEmission()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+Foam::tmp<Foam::volScalarField>
+Foam::radiation::multiBandSolidAbsorptionEmission::aCont
+(
+    const label bandI
+) const
+{
+    tmp<volScalarField> ta
+    (
+        new volScalarField
+        (
+            IOobject
+            (
+                "a",
+                mesh().time().timeName(),
+                mesh(),
+                IOobject::NO_READ,
+                IOobject::NO_WRITE
+            ),
+            mesh(),
+            dimensionedScalar("a", dimless/dimLength, absCoeffs_[bandI])
+        )
+    );
+
+    return ta;
+}
+
+
+Foam::tmp<Foam::volScalarField>
+Foam::radiation::multiBandSolidAbsorptionEmission::eCont
+(
+    const label bandI
+) const
+{
+    tmp<volScalarField> te
+    (
+        new volScalarField
+        (
+            IOobject
+            (
+                "e",
+                mesh().time().timeName(),
+                mesh(),
+                IOobject::NO_READ,
+                IOobject::NO_WRITE
+            ),
+            mesh(),
+            dimensionedScalar("e", dimless/dimLength, emiCoeffs_[bandI])
+        )
+    );
+
+    return te;
+}
+
+
+Foam::tmp<Foam::volScalarField>
+Foam::radiation::multiBandSolidAbsorptionEmission::ECont
+(
+    const label bandI
+) const
+{
+    tmp<volScalarField> E
+    (
+        new volScalarField
+        (
+            IOobject
+            (
+                "E",
+                mesh().time().timeName(),
+                mesh(),
+                IOobject::NO_READ,
+                IOobject::NO_WRITE
+            ),
+            mesh(),
+            dimensionedScalar("E", dimMass/dimLength/pow3(dimTime), 0.0)
+        )
+    );
+
+    return E;
+}
+
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/multiBandSolidAbsorptionEmission/multiBandSolidAbsorptionEmission.H b/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/multiBandSolidAbsorptionEmission/multiBandSolidAbsorptionEmission.H
new file mode 100644
index 0000000000..3a439a36b3
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/multiBandSolidAbsorptionEmission/multiBandSolidAbsorptionEmission.H
@@ -0,0 +1,147 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::radiation::multiBandSolidAbsorptionEmission
+
+Description
+
+    multiBandSolidAbsorptionEmission radiation absorption/emission for solids.
+
+
+SourceFiles
+    multiBandSolidAbsorptionEmission.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef multiBandSolidAbsorptionEmission_H
+#define multiBandSolidAbsorptionEmission_H
+
+#include "absorptionEmissionModel.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace radiation
+{
+
+/*---------------------------------------------------------------------------*\
+                  Class multiBandSolidAbsorptionEmission Declaration
+\*---------------------------------------------------------------------------*/
+
+class multiBandSolidAbsorptionEmission
+:
+    public absorptionEmissionModel
+{
+public:
+
+    // Public data
+
+        //- Maximum number of bands
+        static const int maxBands_ = 5;
+
+
+private:
+
+    // Private data
+
+        //- Absorption model dictionary
+        dictionary coeffsDict_;
+
+        //-  Absorption coefficients
+        scalarList absCoeffs_;
+
+        //-  Emissivity coefficients
+        scalarList emiCoeffs_;
+
+        //- Bands
+        label nBands_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("multiBandSolidAbsorptionEmission");
+
+
+    // Constructors
+
+        //- Construct from components
+        multiBandSolidAbsorptionEmission
+        (
+            const dictionary& dict,
+            const fvMesh& mesh
+        );
+
+
+    //- Destructor
+    virtual ~multiBandSolidAbsorptionEmission();
+
+
+    // Member Functions
+
+        // Access
+
+            // Absorption coefficient
+
+                //- Absorption coefficient
+                tmp<volScalarField> aCont(const label bandI) const;
+
+
+            // Emission coefficient
+
+                //- Emission coefficient
+                tmp<volScalarField> eCont(const label bandI) const;
+
+
+            // Emission contribution
+
+                //- Emission contribution
+                tmp<volScalarField> ECont(const label bandI) const;
+
+
+        inline bool isGrey() const
+        {
+            return false;
+        }
+
+        //- Number of bands
+        inline label nBands() const
+        {
+            return nBands_;
+        }
+
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace radiation
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/boundaryRadiationProperties/boundaryRadiationProperties.C b/src/thermophysicalModels/radiation/submodels/boundaryRadiationProperties/boundaryRadiationProperties.C
new file mode 100644
index 0000000000..61d101bae8
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/boundaryRadiationProperties/boundaryRadiationProperties.C
@@ -0,0 +1,219 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "boundaryRadiationProperties.H"
+#include "boundaryRadiationPropertiesFvPatchField.H"
+#include "fvPatchField.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace radiation
+    {
+        defineTypeNameAndDebug(boundaryRadiationProperties, 0);
+    }
+}
+
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+Foam::IOobject Foam::radiation::boundaryRadiationProperties::createIOobject
+(
+    const fvMesh& mesh, const word name
+) const
+{
+    IOobject io
+    (
+        name,
+        mesh.time().constant(),
+        mesh,
+        IOobject::MUST_READ,
+        IOobject::NO_WRITE
+    );
+
+    if (io.headerOk())
+    {
+        io.readOpt() = IOobject::MUST_READ_IF_MODIFIED;
+        return io;
+    }
+    else
+    {
+        io.readOpt() = IOobject::NO_READ;
+        return io;
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
+
+Foam::radiation::boundaryRadiationProperties::boundaryRadiationProperties
+(
+     const fvMesh& mesh
+)
+:
+    MeshObject
+    <
+        fvMesh,
+        Foam::GeometricMeshObject,
+        boundaryRadiationProperties
+    >(mesh),
+    radBoundaryProperties_()
+{
+    const IOobject boundaryIO
+    (
+        createIOobject(mesh, boundaryRadiationProperties::typeName)
+    );
+
+    if (boundaryIO.readOpt() == IOobject::MUST_READ_IF_MODIFIED)
+    {
+        radBoundaryProperties_.set
+        (
+            new volScalarField(boundaryIO, mesh)
+        );
+    }
+}
+
+
+// * * * * * * * * * * * * * * * Member fucntions * * * * * * * * * * * * *  //
+
+const Foam::volScalarField& Foam::radiation::boundaryRadiationProperties::
+radBoundaryProperties() const
+{
+    return radBoundaryProperties_();
+}
+
+
+Foam::tmp<Foam::scalarField> Foam::radiation::boundaryRadiationProperties::
+emissivity(const label index, const label bandI) const
+{
+    if (!radBoundaryProperties_.empty())
+    {
+        return refCast<const boundaryRadiationPropertiesFvPatchField>
+        (
+            radBoundaryProperties_->boundaryField()[index]
+        ).emissivity(bandI);
+    }
+    else
+    {
+        FatalErrorIn
+        (
+            "Foam::radiation::boundaryRadiationProperties::"
+            "emissivity(const label, const label)"
+        )   << "Field 'boundaryRadiationProperties'"
+            << "is not found in the constant directory."
+            << "Please add it "
+            << exit(FatalError);
+
+         return tmp<scalarField>(new scalarField());
+    }
+}
+
+
+Foam::tmp<Foam::scalarField> Foam::radiation::boundaryRadiationProperties::
+absorptivity(const label index, const label bandI) const
+{
+    if (!radBoundaryProperties_.empty())
+    {
+        return refCast<const boundaryRadiationPropertiesFvPatchField>
+        (
+            radBoundaryProperties_->boundaryField()[index]
+        ).absorptivity(bandI);
+    }
+    else
+    {
+        FatalErrorIn
+        (
+            "Foam::radiation::boundaryRadiationProperties::"
+            "absorptivity(const label, const label)"
+        )   << "Field 'boundaryRadiationProperties'"
+            << "is not found in the constant directory."
+            << "Please add it "
+            << exit(FatalError);
+
+        return tmp<scalarField>(new scalarField());
+    }
+}
+
+
+Foam::tmp<Foam::scalarField> Foam::radiation::boundaryRadiationProperties::
+transmissivity(const label index, const label bandI) const
+{
+    if (!radBoundaryProperties_.empty())
+    {
+        return refCast<const boundaryRadiationPropertiesFvPatchField>
+        (
+            radBoundaryProperties_->boundaryField()[index]
+        ).transmissivity(bandI);
+    }
+    else
+    {
+        FatalErrorIn
+        (
+            "Foam::radiation::boundaryRadiationProperties::"
+            "transmissivity(const label, const label)"
+        )   << "Field 'boundaryRadiationProperties'"
+            << "is not found in the constant directory."
+            << "Please add it "
+            << exit(FatalError);
+
+        return tmp<scalarField>(new scalarField());
+    }
+}
+
+
+Foam::tmp<Foam::scalarField> Foam::radiation::boundaryRadiationProperties::
+reflectivity(const label index, const label bandI) const
+{
+    if (!radBoundaryProperties_.empty())
+    {
+        return refCast<const boundaryRadiationPropertiesFvPatchField>
+        (
+            radBoundaryProperties_->boundaryField()[index]
+        ).reflectivity(bandI);
+    }
+    else
+    {
+        FatalErrorIn
+        (
+            "Foam::radiation::boundaryRadiationProperties::"
+            "reflectivity(const label, const label)"
+        )   << "Field 'boundaryRadiationProperties'"
+            << "is not found in the constant directory."
+            << "Please add it "
+            << exit(FatalError);
+
+        return tmp<scalarField>(new scalarField());
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
+
+Foam::radiation::boundaryRadiationProperties::~boundaryRadiationProperties()
+{}
+
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/boundaryRadiationProperties/boundaryRadiationProperties.H b/src/thermophysicalModels/radiation/submodels/boundaryRadiationProperties/boundaryRadiationProperties.H
new file mode 100644
index 0000000000..0bb1cc4d8d
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/boundaryRadiationProperties/boundaryRadiationProperties.H
@@ -0,0 +1,143 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::fv::boundaryRadiationProperties
+
+Description
+    Boundary radiation properties holder
+
+
+SourceFiles
+    boundaryRadiationProperties.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef boundaryRadiationProperties_H
+#define boundaryRadiationProperties_H
+
+#include "MeshObject.H"
+#include "GeometricField.H"
+#include "volMesh.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+class fvMesh;
+
+namespace radiation
+{
+
+/*---------------------------------------------------------------------------*\
+                   Class boundaryRadiationProperties Declaration
+\*---------------------------------------------------------------------------*/
+
+class boundaryRadiationProperties
+:
+    public MeshObject
+    <
+        fvMesh,
+        Foam::GeometricMeshObject,
+        boundaryRadiationProperties
+    >
+{
+
+    // Private data
+
+        //- AutoPtr to volSacalarField properties
+        autoPtr<volScalarField> radBoundaryProperties_;
+
+
+    // Private member functions
+
+        //- Create IO object if dictionary is present
+        IOobject createIOobject(const fvMesh& mesh, const word) const;
+
+
+public:
+
+    // Declare name of the class and its debug switch
+    TypeName("boundaryRadiationProperties");
+
+
+    // Constructors
+
+        //- Construct given fvMesh and IOobject
+        boundaryRadiationProperties(const fvMesh&);
+
+
+    // Member Functions
+
+        //- Access boundary emissivity on patch
+        tmp<scalarField> emissivity
+        (
+            const label patchId,
+            const label bandI = 0
+        ) const;
+
+
+        //- Access boundary absorptivity on patch
+        tmp<scalarField> absorptivity
+        (
+            const label patchId,
+            const label bandI = 0
+        ) const;
+
+
+        //- Access boundary transmissivity on patch
+        tmp<scalarField> transmissivity
+        (
+            const label patchId,
+            const label bandI = 0
+        ) const;
+
+        //- Access boundary reflectivity on patch
+        tmp<scalarField> reflectivity
+        (
+            const label patchId,
+            const label bandI = 0
+        ) const;
+
+
+        //- Access to radBoundaryProperties
+        const volScalarField& radBoundaryProperties() const;
+
+
+    //- Destructor
+    virtual ~boundaryRadiationProperties();
+
+};
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace radiation
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/solarCalculator/solarCalculator.C b/src/thermophysicalModels/radiation/submodels/solarCalculator/solarCalculator.C
new file mode 100644
index 0000000000..fbd5fcc9fb
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/solarCalculator/solarCalculator.C
@@ -0,0 +1,294 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "solarCalculator.H"
+#include "Time.H"
+#include "unitConversion.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    defineTypeNameAndDebug(solarCalculator, 0);
+
+    template<>
+    const char* NamedEnum
+    <
+        solarCalculator::sunDirModel,
+        2
+    >::names[] =
+    {
+        "sunDirConstant",
+        "sunDirTraking"
+    };
+
+    template<>
+    const char* NamedEnum
+    <
+        solarCalculator::sunLModel,
+        3
+    >::names[] =
+    {
+        "sunLoadConstant",
+        "sunLoadFairWeatherConditions",
+        "sunLoadTheoreticalMaximum"
+    };
+}
+
+const Foam::NamedEnum<Foam::solarCalculator::sunDirModel, 2>
+  Foam::solarCalculator::sunDirectionModelTypeNames_;
+
+const Foam::NamedEnum<Foam::solarCalculator::sunLModel, 3>
+   Foam::solarCalculator::sunLoadModelTypeNames_;
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+void Foam::solarCalculator::calculateBetaTetha()
+{
+    scalar runTime = 0.0;
+    switch (sunDirectionModel_)
+    {
+        case mSunDirTraking:
+        {
+            runTime = mesh_.time().value();
+            break;
+        }
+        case mSunDirConstant:
+        {
+            break;
+        }
+    }
+
+    scalar LSM = 15.0*(readScalar(dict_.lookup("localStandardMeridian")));
+
+    scalar D = readScalar(dict_.lookup("startDay")) + runTime/86400.0;
+    scalar M = 6.24004 + 0.0172*D;
+    scalar EOT = -7.659*sin(M) + 9.863*sin(2*M + 3.5932);
+
+    startTime_ = readScalar(dict_.lookup("startTime"));
+    scalar LST =  startTime_ + runTime/3600.0;
+
+    scalar LON = readScalar(dict_.lookup("longitude"));
+
+    scalar AST = LST + EOT/60.0 + (LON - LSM)/15;
+
+    scalar delta = 23.45*sin(degToRad((360*(284 + D))/365));
+
+    scalar H = degToRad(15*(AST - 12));
+
+    scalar L = degToRad(readScalar(dict_.lookup("latitude")));
+
+    scalar deltaRad = degToRad(delta);
+    beta_ = max(asin(cos(L)*cos(deltaRad)*cos(H) + sin(L)*sin(deltaRad)), 1e-3);
+    tetha_ = acos((sin(beta_)*sin(L) - sin(deltaRad))/(cos(beta_)*cos(L)));
+
+    if (debug)
+    {
+        Info << tab << "altitude : " << radToDeg(beta_) << endl;
+        Info << tab << "azimuth  : " << radToDeg(tetha_) << endl;
+    }
+}
+
+
+void Foam::solarCalculator::calculateSunDirection()
+{
+
+    dict_.lookup("gridUp") >> gridUp_;
+    gridUp_ /= mag(gridUp_);
+
+    dict_.lookup("gridEast") >> eastDir_;
+    eastDir_ /= mag(eastDir_);
+
+    coord_.reset
+    (
+        new coordinateSystem("grid", vector::zero, gridUp_, eastDir_)
+    );
+
+    direction_.z() = -sin(beta_);
+    direction_.y() =  cos(beta_)*cos(tetha_); //North
+    direction_.x() =  cos(beta_)*sin(tetha_); //East
+
+    direction_ /= mag(direction_);
+
+    if (debug)
+    {
+        Info<< "Sun direction in absolute coordinates : " << direction_ <<endl;
+    }
+
+    direction_ = coord_->R().transform(direction_);
+
+    if (debug)
+    {
+        Info<< "Sun direction in the Grid coordinates : " << direction_ <<endl;
+    }
+}
+
+
+void Foam::solarCalculator::init()
+{
+    switch (sunDirectionModel_)
+    {
+        case mSunDirConstant:
+        {
+            if (dict_.found("sunDirection"))
+            {
+                dict_.lookup("sunDirection") >> direction_;
+                direction_ /= mag(direction_);
+            }
+            else
+            {
+                calculateBetaTetha();
+                calculateSunDirection();
+            }
+
+            break;
+        }
+        case mSunDirTraking:
+        {
+            if (word(mesh_.ddtScheme("default")) == "steadyState")
+            {
+                FatalErrorIn
+                (
+                    "Foam::solarCalculator::init()"
+                )   << " Sun direction model can not be sunDirtracking if the "
+                    << " case is steady " << nl << exit(FatalError);
+            }
+
+            dict_.lookup("sunTrackingUpdateInterval") >>
+                sunTrackingUpdateInterval_;
+
+            calculateBetaTetha();
+            calculateSunDirection();
+            break;
+        }
+    }
+
+    switch (sunLoadModel_)
+    {
+        case mSunLoadConstant:
+        {
+            dict_.lookup("directSolarRad") >> directSolarRad_;
+            dict_.lookup("diffuseSolarRad") >> diffuseSolarRad_;
+            break;
+        }
+        case mSunLoadFairWeatherConditions:
+        {
+            A_ = readScalar(dict_.lookup("A"));
+            B_ = readScalar(dict_.lookup("B"));
+
+            if (dict_.found("beta"))
+            {
+                dict_.lookup("beta") >> beta_;
+            }
+            else
+            {
+                calculateBetaTetha();
+            }
+
+            directSolarRad_ = A_/exp(B_/sin(beta_));
+
+            groundReflectivity_ =
+                readScalar(dict_.lookup("groundReflectivity"));
+
+            break;
+        }
+        case mSunLoadTheoreticalMaximum:
+        {
+            Setrn_ = readScalar(dict_.lookup("Setrn"));
+            SunPrime_ = readScalar(dict_.lookup("SunPrime"));
+            directSolarRad_ = Setrn_*SunPrime_;
+
+            groundReflectivity_ =
+                readScalar(dict_.lookup("groundReflectivity"));
+            break;
+        }
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::solarCalculator::solarCalculator
+(
+    const dictionary& dict,
+    const fvMesh& mesh
+)
+:
+    mesh_(mesh),
+    dict_(dict),
+    direction_(vector::zero),
+    directSolarRad_(0.0),
+    diffuseSolarRad_(0.0),
+    groundReflectivity_(0.0),
+    A_(0.0),
+    B_(0.0),
+    beta_(0.0),
+    tetha_(0.0),
+    Setrn_(0.0),
+    SunPrime_(0.0),
+    C_(readScalar(dict.lookup("C"))),
+    sunDirectionModel_
+    (
+        sunDirectionModelTypeNames_.read(dict.lookup("sunDirectionModel"))
+    ),
+    sunLoadModel_
+    (
+        sunLoadModelTypeNames_.read(dict.lookup("sunLoadModel"))
+    ),
+    coord_()
+{
+    init();
+}
+
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::solarCalculator::~solarCalculator()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::solarCalculator::correctSunDirection()
+{
+    switch (sunDirectionModel_)
+    {
+        case mSunDirConstant:
+        {
+            break;
+        }
+        case mSunDirTraking:
+        {
+            calculateBetaTetha();
+            calculateSunDirection();
+            directSolarRad_ = A_/exp(B_/sin(max(beta_, ROOTVSMALL)));
+            break;
+        }
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/solarCalculator/solarCalculator.H b/src/thermophysicalModels/radiation/submodels/solarCalculator/solarCalculator.H
new file mode 100644
index 0000000000..5c54294d96
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/solarCalculator/solarCalculator.H
@@ -0,0 +1,323 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::solarCalculator
+
+Description
+    The solar calculator model provides information about the Sun direction
+    and Sun load model. The available models are:
+
+    For the Sun direction:
+    1) SunDirConstant : the direction is given in 'sunDirection'
+    2) SunDirTraking : the direction is calculated from the following
+       parameters:
+            localStandardMeridian : GMT (Local Zone Meridian) in hours
+            startDay :  day from 1 to 365)
+            startTime:  in hours
+            longitude:  in degrees
+            latitude:   in degrees
+            gridUp:     grid orientation upwards
+            gridEast    grid orientation eastwards
+
+        This model should be use in transient calculations.
+        The keyword 'sunTrackingUpdateInterval' (in hours) specifies on which
+        interval is the Sun direction updated.
+
+
+    Solar Load models available:
+    1) SunLoadConstant: direct and diffusive heat fluxes are provided by the
+       entries 'directSolarRad' and 'diffuseSolarRad'
+
+    2) SunLoadFairWeatherConditions: The solar fluxes are calculated following
+       the Fair Weather Conditions Method from the ASHRAE Handbook. The entries
+       are:
+            A :     Apparent solar irradiation at air mass m = 0
+            B :     Atmospheric extinction coefficient
+            beta:   Solar altitude (in degrees) above the horizontal. This
+            can be read or calculated providing the respective parameters
+            for Sun position explained above.
+            groundReflectivity : ground reflectivity
+
+            In this model the flux is calculated as:
+
+                directSolarRad = A/exp(B/sin(beta));
+
+    3) SunLoadTheoreticalMaximum: The entries are:
+            Setrn
+            SunPrime:
+            groundReflectivity : ground reflectivity
+
+            In this model the flux is calculated as:
+
+                directSolarRad = Setrn*SunPrime;
+
+    The diffuse on vertical/horizontal walls and ground-reflected radiation are
+    calculated following the ASHRAE Handbook.
+
+
+SourceFiles
+    solarCalculator.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef solarCalculator_H
+#define solarCalculator_H
+
+#include "fvMesh.H"
+#include "meshTools.H"
+#include "DynamicField.H"
+#include "HashSet.H"
+#include "coordinateSystem.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class solarCalculator Declaration
+\*---------------------------------------------------------------------------*/
+
+class solarCalculator
+{
+public:
+
+    //  Public enumeration
+
+        //- Sun direction models
+        enum sunDirModel
+        {
+            mSunDirConstant,
+            mSunDirTraking
+        };
+
+        //- Direct sun load models
+        enum sunLModel
+        {
+            mSunLoadConstant,
+            mSunLoadFairWeatherConditions,
+            mSunLoadTheoreticalMaximum
+        };
+
+
+protected:
+
+         //- Sun direction models
+        static const NamedEnum<sunDirModel, 2> sunDirectionModelTypeNames_;
+
+        //- Sun load models
+        static const NamedEnum<sunLModel, 3> sunLoadModelTypeNames_;
+
+private:
+
+    // Private data
+
+
+        //- Reference to mesh
+        const fvMesh& mesh_;
+
+        //- Dictionary
+        dictionary dict_;
+
+        //- Direction
+        vector direction_;
+
+        //- Direct solar irradiation
+        scalar directSolarRad_;
+
+        //- Diffuse solar irradiation on vertical surfaces
+        scalar diffuseSolarRad_;
+
+        //- Ground reflectivity
+        scalar groundReflectivity_;
+
+        //- Fair weather direct solar load model parameters
+        scalar A_;
+        scalar B_;
+        scalar beta_;
+        scalar tetha_;
+
+
+        //- Maximum theoretical direct solar load model parameters
+        scalar Setrn_;
+        scalar SunPrime_;
+
+
+        //- Diffusive solar load model parameters
+        scalar C_;
+
+        //- Sun direction model
+        sunDirModel sunDirectionModel_;
+
+        //- Sun load model
+        sunLModel sunLoadModel_;
+
+        //- Grid coordinate system
+        autoPtr<coordinateSystem> coord_;
+
+        //- East grid orientation
+        vector eastDir_;
+
+        //- Up grid orientation
+        vector gridUp_;
+
+        //- Interval in decimal hours to update Sun direction for SunDirTraking
+        scalar sunTrackingUpdateInterval_;
+
+        //- Start time for the Sun position (decimal hours)
+        scalar startTime_;
+
+
+        //- Disallow default bitwise copy construct
+        solarCalculator(const solarCalculator&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const solarCalculator&);
+
+
+    // Private members
+
+        //- Init
+        void init();
+
+        //- Calculate beta and tetha angles
+        void calculateBetaTetha();
+
+        //- Calculate Sun direction
+        void calculateSunDirection();
+
+
+public:
+
+    // Declare name of the class and its debug switch
+    ClassName("solarCalculator");
+
+
+    // Constructors
+
+        //- Construct from dictionary
+        solarCalculator(const dictionary&, const fvMesh&);
+
+
+    //- Destructor
+    ~solarCalculator();
+
+
+    // Member Functions
+
+        // Access
+
+            //- const acess to direction
+            const vector direction() const
+            {
+                return direction_;
+            }
+
+            //- Non-const access to direction
+            vector& direction()
+            {
+                return direction_;
+            }
+
+             //- Return direct solar irradiation
+            scalar directSolarRad()
+            {
+                return directSolarRad_;
+            }
+
+            //- Return diffuse solar irradiation
+            scalar diffuseSolarRad()
+            {
+                return diffuseSolarRad_;
+            }
+
+            //- Return C consntant
+            scalar C()
+            {
+                return C_;
+            }
+
+            //- Return beta
+            scalar beta()
+            {
+                return beta_;
+            }
+
+            //- Return tetha
+            scalar tetha()
+            {
+                return tetha_;
+            }
+
+            //- Return Sun direction model
+            sunDirModel sunDirectionModel() const
+            {
+                return sunDirectionModel_;
+            }
+
+            //- Return Sun load model
+            sunLModel sunLoadModel() const
+            {
+                return sunLoadModel_;
+            }
+
+            //- Return groundReflectivity
+            scalar groundReflectivity()
+            {
+                return groundReflectivity_;
+            }
+
+            //- Return coordinateSystem
+            const coordinateSystem& coord()
+            {
+                return coord_();
+            }
+
+            //- Return sunTrackingUpdateInterval
+            scalar sunTrackingUpdateInterval()
+            {
+                return sunTrackingUpdateInterval_;
+            }
+
+            //- Return startTime
+            scalar startTime()
+            {
+                return startTime_;
+            }
+
+
+        //- Recalculate
+        void correctSunDirection();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/transmissivityModel/constantTransmissivity/constantTransmissivity.C b/src/thermophysicalModels/radiation/submodels/transmissivityModel/constantTransmissivity/constantTransmissivity.C
new file mode 100644
index 0000000000..a981883006
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/transmissivityModel/constantTransmissivity/constantTransmissivity.C
@@ -0,0 +1,94 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "constantTransmissivity.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace radiation
+    {
+        defineTypeNameAndDebug(constantTransmissivity, 0);
+
+        addToRunTimeSelectionTable
+        (
+            transmissivityModel,
+            constantTransmissivity,
+            dictionary
+        );
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::radiation::constantTransmissivity::constantTransmissivity
+(
+    const dictionary& dict,
+    const fvMesh& mesh
+)
+:
+    transmissivityModel(dict, mesh),
+    coeffsDict_(dict.subDict(typeName + "Coeffs")),
+    tau_(readScalar(coeffsDict_.lookup("transmissivity")))
+{}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::radiation::constantTransmissivity::~constantTransmissivity()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+Foam::tmp<Foam::volScalarField>
+Foam::radiation::constantTransmissivity::tauEff(const label bandI) const
+{
+    tmp<volScalarField> tt
+    (
+        new volScalarField
+        (
+            IOobject
+            (
+                "tau",
+                mesh_.time().timeName(),
+                mesh_,
+                IOobject::NO_READ,
+                IOobject::NO_WRITE,
+                false
+            ),
+            mesh_,
+            dimensionedScalar("tau", dimless/dimLength, tau_)
+        )
+    );
+
+    return tt;
+}
+
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/transmissivityModel/constantTransmissivity/constantTransmissivity.H b/src/thermophysicalModels/radiation/submodels/transmissivityModel/constantTransmissivity/constantTransmissivity.H
new file mode 100644
index 0000000000..7f2d2bfb87
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/transmissivityModel/constantTransmissivity/constantTransmissivity.H
@@ -0,0 +1,111 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::radiation::constantTransmissivity
+
+Description
+    Constant radiation scatter coefficient
+
+SourceFiles
+    constantTransmissivity.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef radiationConstantTransmissivity_H
+#define radiationConstantTransmissivity_H
+
+#include "transmissivityModel.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace radiation
+{
+
+/*---------------------------------------------------------------------------*\
+                       Class constantTransmissivity Declaration
+\*---------------------------------------------------------------------------*/
+
+class constantTransmissivity
+:
+    public transmissivityModel
+{
+
+    // Private data
+
+        //- Coefficients dictionary
+        dictionary coeffsDict_;
+
+        //- Transmissivity coefficient / []
+        scalar tau_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("constantTransmissivity");
+
+
+    // Constructors
+
+        //- Construct from components
+        constantTransmissivity(const dictionary& dict, const fvMesh& mesh);
+
+
+    //- Destructor
+    virtual ~constantTransmissivity();
+
+
+    // Member Functions
+
+        //- Return scatter coefficient
+        tmp<volScalarField> tauEff(const label bandI = 0) const;
+
+
+        //- Is Grey
+        inline bool isGrey() const
+        {
+            return true;
+        }
+
+
+        //- Number of bands
+        inline label nBands() const
+        {
+            return 1;
+        }
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace radiation
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/transmissivityModel/multiBandSolidTransmissivity/multiBandSolidTransmissivity.C b/src/thermophysicalModels/radiation/submodels/transmissivityModel/multiBandSolidTransmissivity/multiBandSolidTransmissivity.C
new file mode 100644
index 0000000000..d39fa2e1d4
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/transmissivityModel/multiBandSolidTransmissivity/multiBandSolidTransmissivity.C
@@ -0,0 +1,96 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "multiBandSolidTransmissivity.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace radiation
+    {
+        defineTypeNameAndDebug(multiBandSolidTransmissivity, 0);
+
+        addToRunTimeSelectionTable
+        (
+            transmissivityModel,
+            multiBandSolidTransmissivity,
+            dictionary
+        );
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::radiation::multiBandSolidTransmissivity::multiBandSolidTransmissivity
+(
+    const dictionary& dict,
+    const fvMesh& mesh
+)
+:
+    transmissivityModel(dict, mesh),
+    coeffsDict_(dict.subDict(typeName + "Coeffs")),
+    tauCoeffs_(),
+    nBands_(0)
+{
+    coeffsDict_.lookup("transmissivity") >> tauCoeffs_;
+    nBands_ = tauCoeffs_.size();
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::radiation::multiBandSolidTransmissivity::~multiBandSolidTransmissivity()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+Foam::tmp<Foam::volScalarField>
+Foam::radiation::multiBandSolidTransmissivity::tauEff(const label bandI) const
+{
+    tmp<volScalarField> tt
+    (
+        new volScalarField
+        (
+            IOobject
+            (
+                "t",
+                mesh_.time().timeName(),
+                mesh_,
+                IOobject::NO_READ,
+                IOobject::NO_WRITE
+            ),
+            mesh_,
+            dimensionedScalar("t", dimless/dimLength, tauCoeffs_[bandI])
+        )
+    );
+
+    return tt;
+}
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/transmissivityModel/multiBandSolidTransmissivity/multiBandSolidTransmissivity.H b/src/thermophysicalModels/radiation/submodels/transmissivityModel/multiBandSolidTransmissivity/multiBandSolidTransmissivity.H
new file mode 100644
index 0000000000..85e0a589e6
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/transmissivityModel/multiBandSolidTransmissivity/multiBandSolidTransmissivity.H
@@ -0,0 +1,132 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::radiation::multiBandSolidTransmissivity
+
+Description
+
+    multiBandSolidTransmissivity radiation transmissivity for solids.
+
+
+SourceFiles
+    multiBandSolidTransmissivity.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef multiBandSolidTransmissivity_H
+#define multiBandSolidTransmissivity_H
+
+#include "transmissivityModel.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace radiation
+{
+
+/*---------------------------------------------------------------------------*\
+                  Class multiBandSolidTransmissivity Declaration
+\*---------------------------------------------------------------------------*/
+
+class multiBandSolidTransmissivity
+:
+    public transmissivityModel
+{
+public:
+
+    // Public data
+
+        //- Maximum number of bands
+        static const label maxBands_ = 5;
+
+
+private:
+
+    // Private data
+
+        //- Absorption model dictionary
+        dictionary coeffsDict_;
+
+        //-  Absorption coefficients
+        scalarList tauCoeffs_;
+
+        //- Bands
+        label nBands_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("multiBandSolidTransmissivity");
+
+
+    // Constructors
+
+        //- Construct from components
+        multiBandSolidTransmissivity
+        (
+            const dictionary& dict,
+            const fvMesh& mesh
+        );
+
+
+    //- Destructor
+    virtual ~multiBandSolidTransmissivity();
+
+
+    // Member Functions
+
+        // Access
+
+            //- Transmissivity coefficient
+            tmp<volScalarField> tauEff(const label bandI) const;
+
+
+            //- Is Grey
+            inline bool isGrey() const
+            {
+                return false;
+            }
+
+
+            //- Number of bands
+            inline label nBands() const
+            {
+                return nBands_;
+            }
+
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace radiation
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/transmissivityModel/noTransmissivity/noTransmissivity.C b/src/thermophysicalModels/radiation/submodels/transmissivityModel/noTransmissivity/noTransmissivity.C
new file mode 100644
index 0000000000..6d995d89f0
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/transmissivityModel/noTransmissivity/noTransmissivity.C
@@ -0,0 +1,91 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "noTransmissivity.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace radiation
+    {
+        defineTypeNameAndDebug(noTransmissivity, 0);
+        addToRunTimeSelectionTable
+        (
+            transmissivityModel,
+            noTransmissivity,
+            dictionary
+        );
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::radiation::noTransmissivity::noTransmissivity
+(
+    const dictionary& dict,
+    const fvMesh& mesh
+)
+:
+    transmissivityModel(dict, mesh)
+{}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::radiation::noTransmissivity::~noTransmissivity()
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+Foam::tmp<Foam::volScalarField> Foam::radiation::noTransmissivity::tauEff
+(
+    const label bandI
+) const
+{
+    return tmp<volScalarField>
+    (
+        new volScalarField
+        (
+            IOobject
+            (
+                "tau",
+                mesh_.time().timeName(),
+                mesh_,
+                IOobject::NO_READ,
+                IOobject::NO_WRITE,
+                false
+            ),
+            mesh_,
+            dimensionedScalar("zero", dimless, 0.0)
+        )
+    );
+}
+
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/transmissivityModel/noTransmissivity/noTransmissivity.H b/src/thermophysicalModels/radiation/submodels/transmissivityModel/noTransmissivity/noTransmissivity.H
new file mode 100644
index 0000000000..3d0be9b1a7
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/transmissivityModel/noTransmissivity/noTransmissivity.H
@@ -0,0 +1,101 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::radiation::noTransmissivity
+
+Description
+    Dummy transmissivity model for 'none'
+
+SourceFiles
+    noTransmissivity.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef radiationConstantScatter_H
+#define radiationConstantScatter_H
+
+#include "transmissivityModel.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace radiation
+{
+
+/*---------------------------------------------------------------------------*\
+                          Class noTransmissivity Declaration
+\*---------------------------------------------------------------------------*/
+
+class noTransmissivity
+:
+    public transmissivityModel
+{
+
+public:
+
+    //- Runtime type information
+    TypeName("none");
+
+
+    // Constructors
+
+        //- Construct from components
+        noTransmissivity(const dictionary& dict, const fvMesh& mesh);
+
+
+    //- Destructor
+    virtual ~noTransmissivity();
+
+
+    // Member Functions
+
+        //- Return scatter coefficient
+        tmp<volScalarField> tauEff(const label bandI = 0) const;
+
+         //- Is Grey
+        inline bool isGrey() const
+        {
+            return true;
+        }
+
+
+        //- Number of bands
+        inline label nBands() const
+        {
+            return 1;
+        }
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace radiation
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModel.C b/src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModel.C
new file mode 100644
index 0000000000..ddd9226bf5
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModel.C
@@ -0,0 +1,59 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "error.H"
+#include "transmissivityModel.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace radiation
+    {
+        defineTypeNameAndDebug(transmissivityModel, 0);
+        defineRunTimeSelectionTable(transmissivityModel, dictionary);
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::radiation::transmissivityModel::transmissivityModel
+(
+    const dictionary&,
+    const fvMesh& mesh
+)
+:
+    mesh_(mesh)
+{}
+
+
+// * * * * * * * * * * * * * * * * Destructor    * * * * * * * * * * * * * * //
+
+Foam::radiation::transmissivityModel::~transmissivityModel()
+{}
+
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModel.H b/src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModel.H
new file mode 100644
index 0000000000..46e9babc13
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModel.H
@@ -0,0 +1,123 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::radiation::transmissivityModel
+
+Description
+    Base class for radiation scattering
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef transmissivityModel_H
+#define transmissivityModel_H
+
+#include "IOdictionary.H"
+#include "autoPtr.H"
+#include "runTimeSelectionTables.H"
+#include "volFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace radiation
+{
+
+/*---------------------------------------------------------------------------*\
+                        Class transmissivityModel Declaration
+\*---------------------------------------------------------------------------*/
+
+class transmissivityModel
+{
+
+protected:
+
+    // Protected data
+
+        //- Reference to the fvMesh
+        const fvMesh& mesh_;
+
+public:
+
+    //- Runtime type information
+    TypeName("transmissivityModel");
+
+    // Declare runtime constructor selection table
+
+        declareRunTimeSelectionTable
+        (
+            autoPtr,
+            transmissivityModel,
+            dictionary,
+            (
+                const dictionary& dict,
+                const fvMesh& mesh
+            ),
+            (dict, mesh)
+        );
+
+
+    // Constructors
+
+        //- Construct from components
+        transmissivityModel(const dictionary& dict, const fvMesh& mesh);
+
+
+    // Selector
+
+        static autoPtr<transmissivityModel> New
+        (
+            const dictionary& dict,
+            const fvMesh& mesh
+        );
+
+
+    //- Destructor
+    virtual ~transmissivityModel();
+
+
+    // Member Functions
+
+        //- Return scatter coefficient
+        virtual tmp<volScalarField> tauEff(const label bandI = 0) const = 0;
+
+        //- Is Grey
+        virtual bool isGrey() const = 0;
+
+        //- Number of bands
+        virtual label nBands() const = 0;
+
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace radiation
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModelNew.C b/src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModelNew.C
new file mode 100644
index 0000000000..ed66cec6d6
--- /dev/null
+++ b/src/thermophysicalModels/radiation/submodels/transmissivityModel/transmissivityModel/transmissivityModelNew.C
@@ -0,0 +1,61 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "error.H"
+#include "transmissivityModel.H"
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::autoPtr<Foam::radiation::transmissivityModel> Foam::radiation::
+transmissivityModel::New
+(
+    const dictionary& dict,
+    const fvMesh& mesh
+)
+{
+    const word modelType(dict.lookup("transmissivityModel"));
+
+    Info<< "Selecting transmissivityModel " << modelType << endl;
+
+    dictionaryConstructorTable::iterator cstrIter =
+        dictionaryConstructorTablePtr_->find(modelType);
+
+    if (cstrIter == dictionaryConstructorTablePtr_->end())
+    {
+        FatalErrorIn
+        (
+            "transmissivityModel::New(const dictionary&, const fvMesh&)"
+        )   << "Unknown transmissivityModel type "
+            << modelType << nl << nl
+            << "Valid transmissivityModel types are :" << nl
+            << dictionaryConstructorTablePtr_->sortedToc()
+            << exit(FatalError);
+    }
+
+    return autoPtr<transmissivityModel>(cstrIter()(dict, mesh));
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/0/IDefault b/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/0/IDefault
index 629aa0b799..a572ef725d 100644
--- a/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/0/IDefault
+++ b/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/0/IDefault
@@ -24,9 +24,6 @@ boundaryField
     region0_to_pyrolysisRegion_coupledWall
     {
         type            greyDiffusiveRadiation;
-        T               T;
-        emissivityMode  solidRadiation;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 
@@ -38,9 +35,6 @@ boundaryField
     ".*"
     {
         type            greyDiffusiveRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }
diff --git a/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/constant/pyrolysisRegion/radiationProperties b/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/constant/pyrolysisRegion/radiationProperties
index 116bbbd18a..014b85f5f4 100644
--- a/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/constant/pyrolysisRegion/radiationProperties
+++ b/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/constant/pyrolysisRegion/radiationProperties
@@ -37,5 +37,6 @@ greyMeanSolidAbsorptionEmissionCoeffs
 
 scatterModel    none;
 
+transmissivityModel none;
 
 // ************************************************************************* //
diff --git a/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/constant/radiationProperties b/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/constant/radiationProperties
index 242c5aace4..12ce2a582f 100644
--- a/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/constant/radiationProperties
+++ b/tutorials/combustion/fireFoam/les/flameSpreadWaterSuppressionPanel/constant/radiationProperties
@@ -53,5 +53,6 @@ scatterModel    none;
 
 sootModel       none;
 
+transmissivityModel none;
 
 // ************************************************************************* //
diff --git a/tutorials/combustion/fireFoam/les/oppositeBurningPanels/0/G b/tutorials/combustion/fireFoam/les/oppositeBurningPanels/0/G
index fd53ea0248..d04c625f9b 100644
--- a/tutorials/combustion/fireFoam/les/oppositeBurningPanels/0/G
+++ b/tutorials/combustion/fireFoam/les/oppositeBurningPanels/0/G
@@ -23,17 +23,12 @@ boundaryField
     ".*"
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 
     "(region0_to.*)"
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  solidRadiation;
         value           uniform 0;
     }
 }
diff --git a/tutorials/combustion/fireFoam/les/oppositeBurningPanels/0/IDefault b/tutorials/combustion/fireFoam/les/oppositeBurningPanels/0/IDefault
index c670ea7e1d..27fb7c0953 100644
--- a/tutorials/combustion/fireFoam/les/oppositeBurningPanels/0/IDefault
+++ b/tutorials/combustion/fireFoam/les/oppositeBurningPanels/0/IDefault
@@ -23,16 +23,11 @@ boundaryField
     ".*"
     {
         type            greyDiffusiveRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
     "(region0_to.*)"
     {
         type            greyDiffusiveRadiation;
-        T               T;
-        emissivityMode  solidRadiation;
         value           uniform 0;
     }
 }
diff --git a/tutorials/combustion/fireFoam/les/oppositeBurningPanels/constant/panelRegion/radiationProperties b/tutorials/combustion/fireFoam/les/oppositeBurningPanels/constant/panelRegion/radiationProperties
index 71abc0f0fa..edf1949fe5 100644
--- a/tutorials/combustion/fireFoam/les/oppositeBurningPanels/constant/panelRegion/radiationProperties
+++ b/tutorials/combustion/fireFoam/les/oppositeBurningPanels/constant/panelRegion/radiationProperties
@@ -39,5 +39,6 @@ greyMeanSolidAbsorptionEmissionCoeffs
 
 scatterModel    none;
 
+transmissivityModel       none;
 
 // ************************************************************************* //
diff --git a/tutorials/combustion/fireFoam/les/oppositeBurningPanels/constant/radiationProperties b/tutorials/combustion/fireFoam/les/oppositeBurningPanels/constant/radiationProperties
index b779d05d38..3dded6d720 100644
--- a/tutorials/combustion/fireFoam/les/oppositeBurningPanels/constant/radiationProperties
+++ b/tutorials/combustion/fireFoam/les/oppositeBurningPanels/constant/radiationProperties
@@ -193,4 +193,6 @@ scatterModel    none;
 
 sootModel       none;
 
+transmissivityModel       none;
+
 // ************************************************************************* //
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/G b/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/G
index 5dfaf2e402..c19dd58f09 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/G
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/G
@@ -23,9 +23,6 @@ boundaryField
     ".*"
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/IDefault b/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/IDefault
index 75186697cd..b38b64bdea 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/IDefault
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire2D/0/IDefault
@@ -23,9 +23,6 @@ boundaryField
     ".*"
     {
         type            greyDiffusiveRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/boundaryRadiationProperties b/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/boundaryRadiationProperties
new file mode 100644
index 0000000000..5f6307fa37
--- /dev/null
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/boundaryRadiationProperties
@@ -0,0 +1,37 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    object      boundaryRadiationProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 0 0 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+     ".*"
+    {
+        type            boundaryRadiation;
+        mode            lookup;
+        emissivity      uniform 1.0;
+        value           uniform 0;
+    }
+
+    frontAndBack
+    {
+        type            empty;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/polyMesh/boundary b/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/polyMesh/boundary
index 6a17bae1f0..0082e381a9 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/polyMesh/boundary
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/polyMesh/boundary
@@ -1,7 +1,7 @@
 /*--------------------------------*- C++ -*----------------------------------*\
 | =========                 |                                                 |
 | \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
-|  \\    /   O peration     | Version:  dev                                   |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
 |   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
 |    \\/     M anipulation  |                                                 |
 \*---------------------------------------------------------------------------*/
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/radiationProperties b/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/radiationProperties
index a25c81382a..5c303889a4 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/radiationProperties
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire2D/constant/radiationProperties
@@ -197,4 +197,8 @@ mixtureFractionSootCoeffs
     nuSoot              0.055;
     Wsoot               12;
 }
+
+transmissivityModel       none;
+
+
 // ************************************************************************* //
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/G b/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/G
index fe75242d76..e7bea0ebea 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/G
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/G
@@ -23,9 +23,6 @@ boundaryField
     ".*"
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/IDefault b/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/IDefault
index 1da0ef50b9..9d5ac9c871 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/IDefault
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire3D/0/IDefault
@@ -23,9 +23,6 @@ boundaryField
     ".*"
     {
         type            greyDiffusiveRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1;
         value           uniform 0;
     }
 }
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire3D/constant/boundaryRadiationProperties b/tutorials/combustion/fireFoam/les/smallPoolFire3D/constant/boundaryRadiationProperties
new file mode 100644
index 0000000000..7008951d9a
--- /dev/null
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire3D/constant/boundaryRadiationProperties
@@ -0,0 +1,33 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    object      boundaryRadiationProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 0 0 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    ".*"
+    {
+        type            boundaryRadiation;
+        mode            lookup;
+        emissivity      uniform 1.0;
+        absorptivity    uniform 0.0;
+        value           uniform 0.0;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/combustion/fireFoam/les/smallPoolFire3D/constant/radiationProperties b/tutorials/combustion/fireFoam/les/smallPoolFire3D/constant/radiationProperties
index 621656b060..79c4fe7fe2 100644
--- a/tutorials/combustion/fireFoam/les/smallPoolFire3D/constant/radiationProperties
+++ b/tutorials/combustion/fireFoam/les/smallPoolFire3D/constant/radiationProperties
@@ -192,4 +192,7 @@ scatterModel    none;
 
 sootModel       none;
 
+transmissivityModel none;
+
+
 // ************************************************************************* //
diff --git a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/0/G b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/0/G
index b3a71a27e9..a7e83e641d 100644
--- a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/0/G
+++ b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/0/G
@@ -23,36 +23,24 @@ boundaryField
     floor
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 
     fixedWalls
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 
     ceiling
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 
     box
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }
diff --git a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/constant/boundaryRadiationProperties b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/constant/boundaryRadiationProperties
new file mode 100644
index 0000000000..db98582239
--- /dev/null
+++ b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/constant/boundaryRadiationProperties
@@ -0,0 +1,60 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    object      boundaryRadiationProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 0 0 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    box
+    {
+        type            boundaryRadiation;
+        mode            lookup;
+        emissivity      uniform 1.0;
+        absorptivity    uniform 1.0;
+        value           uniform 0;
+    }
+
+    floor
+    {
+        type            boundaryRadiation;
+        mode            lookup;
+        emissivity      uniform 1.0;
+        absorptivity    uniform 1.0;
+        value           uniform 0;
+    }
+
+    ceiling
+    {
+        type            boundaryRadiation;
+        mode            lookup;
+        emissivity      uniform 1.0;
+        absorptivity    uniform 1.0;
+        value           uniform 0;
+    }
+
+    fixedWalls
+    {
+        type            boundaryRadiation;
+        mode            lookup;
+        emissivity      uniform 1.0;
+        absorptivity    uniform 1.0;
+        value           uniform 0;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/constant/radiationProperties b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/constant/radiationProperties
index 7ac310e542..cb84664b87 100644
--- a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/constant/radiationProperties
+++ b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoom/constant/radiationProperties
@@ -35,5 +35,6 @@ scatterModel    none;
 
 sootModel       none;
 
+transmissivityModel none;
 
 // ************************************************************************* //
diff --git a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/0/IDefault b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/0/IDefault
index e70bf3dec0..9d5ac9c871 100644
--- a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/0/IDefault
+++ b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/0/IDefault
@@ -23,9 +23,6 @@ boundaryField
     ".*"
     {
         type            greyDiffusiveRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
 }
diff --git a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/constant/boundaryRadiationProperties b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/constant/boundaryRadiationProperties
new file mode 100644
index 0000000000..30444413e7
--- /dev/null
+++ b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/constant/boundaryRadiationProperties
@@ -0,0 +1,33 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    object      boundaryRadiationProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 0 0 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    ".*"
+    {
+        type            boundaryRadiation;
+        mode            lookup;
+        emissivity      uniform 1.0;
+        absorptivity    uniform 1.0;
+        value           uniform 0.0;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/constant/radiationProperties b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/constant/radiationProperties
index 76bbe562b8..9bd4093240 100644
--- a/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/constant/radiationProperties
+++ b/tutorials/heatTransfer/buoyantSimpleFoam/hotRadiationRoomFvDOM/constant/radiationProperties
@@ -44,4 +44,6 @@ scatterModel    none;
 
 sootModel       none;
 
+transmissivityModel none;
+
 // ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/G b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/G
new file mode 100644
index 0000000000..e50c4450ca
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/G
@@ -0,0 +1,62 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      G;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [1 0 -3 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    maxY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    maxX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    maxZ
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    air_to_floor
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    air_to_solid
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/IDefault b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/IDefault
new file mode 100644
index 0000000000..90f5a8e2c9
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/IDefault
@@ -0,0 +1,62 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      IDefault;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [ 1 0 -3 0 0 0 0 ];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    maxY
+    {
+        type            greyDiffusiveRadiation;
+        value           uniform 0;
+    }
+    minX
+    {
+        type            greyDiffusiveRadiation;
+        value           uniform 0;
+    }
+    maxX
+    {
+        type            greyDiffusiveRadiation;
+        value           uniform 0;
+    }
+    minY
+    {
+        type            greyDiffusiveRadiation;
+        value           uniform 0;
+    }
+    maxZ
+    {
+        type            greyDiffusiveRadiation;
+        value           uniform 0;
+    }
+    air_to_floor
+    {
+        type            greyDiffusiveRadiation;
+        value           uniform 0;
+    }
+    air_to_solid
+    {
+        type            greyDiffusiveRadiation;
+        value           uniform 0;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/Qr b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/Qr
new file mode 100644
index 0000000000..7964d31308
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/Qr
@@ -0,0 +1,62 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      Qr;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [1 0 -3 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    maxY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    maxX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    maxZ
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    air_to_floor
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    air_to_solid
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/T b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/T
new file mode 100644
index 0000000000..061bb924d7
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/T
@@ -0,0 +1,79 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      T;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [ 0 0 0 1 0 0 0 ];
+
+internalField   uniform 300;
+
+boundaryField
+{
+    maxY
+    {
+        type            inletOutlet;
+        value           uniform 300;
+        inletValue      uniform 300;
+    }
+    minX
+    {
+        type            inletOutlet;
+        value           uniform 300;
+        inletValue      uniform 300;
+    }
+    maxX
+    {
+        type            inletOutlet;
+        value           uniform 300;
+        inletValue      uniform 300;
+    }
+    minY
+    {
+        type            inletOutlet;
+        value           uniform 300;
+        inletValue      uniform 300;
+    }
+    maxZ
+    {
+        type            inletOutlet;
+        value           uniform 300;
+        inletValue      uniform 300;
+    }
+    air_to_floor
+    {
+        type            compressible::turbulentTemperatureRadCoupledMixed;
+        value           uniform 300;
+        inletValue      uniform 300;
+        Tnbr            T;
+        kappa           fluidThermo;
+        QrNbr           none;
+        Qr              Qr;
+        kappaName       none;
+    }
+    air_to_solid
+    {
+        type            compressible::turbulentTemperatureRadCoupledMixed;
+        value           uniform 300;
+        inletValue      uniform 300;
+        Tnbr            T;
+        kappa           fluidThermo;
+        QrNbr           none;
+        Qr              Qr;
+        kappaName       none;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/U b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/U
new file mode 100644
index 0000000000..3766e44520
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/U
@@ -0,0 +1,74 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volVectorField;
+    location    "0/air";
+    object      U;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [ 0 1 -1 0 0 0 0 ];
+
+internalField   uniform ( 0.1 0 0 );
+
+boundaryField
+{
+    maxY
+    {
+        type            pressureInletOutletVelocity;
+        value           uniform ( 0 0 0 );
+        phi             phi;
+    }
+    minX
+    {
+        type            pressureInletOutletVelocity;
+        value           uniform ( 0 0 0 );
+        phi             phi;
+    }
+    maxX
+    {
+        type            pressureInletOutletVelocity;
+        value           uniform ( 0 0 0 );
+        phi             phi;
+    }
+    minY
+    {
+        type            pressureInletOutletVelocity;
+        value           uniform ( 0 0 0 );
+        phi             phi;
+    }
+    maxZ
+    {
+        type            pressureInletOutletVelocity;
+        value           uniform ( 0 0 0 );
+        phi             phi;
+    }
+    air_to_floor
+    {
+        type            fixedValue;
+        value           uniform ( 0 0 0 );
+        phi             phi;
+    }
+    air_to_solid
+    {
+        type            fixedValue;
+        value           uniform ( 0 0 0 );
+        phi             phi;
+    }
+    region0_to_floor_floor_zone
+    {
+        type            fixedValue;
+        value           uniform ( 0 0 0 );
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/alphat b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/alphat
new file mode 100644
index 0000000000..bfb1180c93
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/alphat
@@ -0,0 +1,64 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      alphat;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [1 -1 -1 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    maxY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    maxX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    maxZ
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    air_to_floor
+    {
+        type            compressible::alphatWallFunction;
+        Prt             0.85;
+        value           uniform 0;
+    }
+    air_to_solid
+    {
+        type            compressible::alphatWallFunction;
+        Prt             0.85;
+        value           uniform 0;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/epsilon b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/epsilon
new file mode 100644
index 0000000000..f5fa97e035
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/epsilon
@@ -0,0 +1,69 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      epsilon;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [ 0 2 -3 0 0 0 0 ];
+
+internalField   uniform 0.01;
+
+boundaryField
+{
+    maxY
+    {
+        type            inletOutlet;
+        value           uniform 0.01;
+        inletValue      uniform 0.01;
+    }
+    minX
+    {
+        type            inletOutlet;
+        value           uniform 0.01;
+        inletValue      uniform 0.01;
+    }
+    maxX
+    {
+        type            inletOutlet;
+        value           uniform 0.01;
+        inletValue      uniform 0.01;
+    }
+    minY
+    {
+        type            inletOutlet;
+        value           uniform 0.01;
+        inletValue      uniform 0.01;
+    }
+    maxZ
+    {
+        type            inletOutlet;
+        value           uniform 0.01;
+        inletValue      uniform 0.01;
+    }
+    air_to_floor
+    {
+        type            epsilonWallFunction;
+        value           uniform 0.01;
+        inletValue      uniform 0.01;
+    }
+    air_to_solid
+    {
+        type            epsilonWallFunction;
+        value           uniform 0.01;
+        inletValue      uniform 0.01;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/k b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/k
new file mode 100644
index 0000000000..2b3045a922
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/k
@@ -0,0 +1,69 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      k;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [ 0 2 -2 0 0 0 0 ];
+
+internalField   uniform 0.1;
+
+boundaryField
+{
+    maxY
+    {
+        type            inletOutlet;
+        value           uniform 0.1;
+        inletValue      uniform 0.1;
+    }
+    minX
+    {
+        type            inletOutlet;
+        value           uniform 0.1;
+        inletValue      uniform 0.1;
+    }
+    maxX
+    {
+        type            inletOutlet;
+        value           uniform 0.1;
+        inletValue      uniform 0.1;
+    }
+    minY
+    {
+        type            inletOutlet;
+        value           uniform 0.1;
+        inletValue      uniform 0.1;
+    }
+    maxZ
+    {
+        type            inletOutlet;
+        value           uniform 0.1;
+        inletValue      uniform 0.1;
+    }
+    air_to_floor
+    {
+        type            kqRWallFunction;
+        value           uniform 0.1;
+        inletValue      uniform 0.1;
+    }
+    air_to_solid
+    {
+        type            kqRWallFunction;
+        value           uniform 0.1;
+        inletValue      uniform 0.1;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/nut b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/nut
new file mode 100644
index 0000000000..2acdb9f7fd
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/nut
@@ -0,0 +1,68 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      nut;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 2 -1 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    maxY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    maxX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    maxZ
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    air_to_floor
+    {
+        type            nutkWallFunction;
+        Cmu             0.09;
+        kappa           0.41;
+        E               9.8;
+        value           uniform 0;
+    }
+    air_to_solid
+    {
+        type            nutkWallFunction;
+        Cmu             0.09;
+        kappa           0.41;
+        E               9.8;
+        value           uniform 0;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/p b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/p
new file mode 100644
index 0000000000..cb29745bbe
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/p
@@ -0,0 +1,62 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      p;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [ 1 -1 -2 0 0 0 0 ];
+
+internalField   uniform 100000;
+
+boundaryField
+{
+    maxY
+    {
+        type            calculated;
+        value           uniform 100000;
+    }
+    minX
+    {
+        type            calculated;
+        value           uniform 100000;
+    }
+    maxX
+    {
+        type            calculated;
+        value           uniform 100000;
+    }
+    minY
+    {
+        type            calculated;
+        value           uniform 100000;
+    }
+    maxZ
+    {
+        type            calculated;
+        value           uniform 100000;
+    }
+    air_to_floor
+    {
+        type            calculated;
+        value           uniform 100000;
+    }
+    air_to_solid
+    {
+        type            calculated;
+        value           uniform 100000;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/p_rgh b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/p_rgh
new file mode 100644
index 0000000000..cb5bf5aed1
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/air/p_rgh
@@ -0,0 +1,104 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/air";
+    object      p_rgh;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [ 1 -1 -2 0 0 0 0 ];
+
+internalField   uniform 100000;
+
+boundaryField
+{
+    maxY
+    {
+        type            totalPressure;
+        value           $internalField;
+        p0              $internalField;
+        U               U;
+        phi             phi;
+        rho             rho;
+        psi             none;
+        gamma           0;
+    }
+    minX
+    {
+        type            totalPressure;
+        value           $internalField;
+        p0              $internalField;
+        U               U;
+        phi             phi;
+        rho             rho;
+        psi             none;
+        gamma           0;
+    }
+    maxX
+    {
+        type            totalPressure;
+        value           $internalField;
+        p0              $internalField;
+        U               U;
+        phi             phi;
+        rho             rho;
+        psi             none;
+        gamma           0;
+    }
+    minY
+    {
+        type            totalPressure;
+        value           $internalField;
+        p0              $internalField;
+        U               U;
+        phi             phi;
+        rho             rho;
+        psi             none;
+        gamma           0;
+    }
+    maxZ
+    {
+        type            totalPressure;
+        value           $internalField;
+        p0              $internalField;
+        U               U;
+        phi             phi;
+        rho             rho;
+        psi             none;
+        gamma           0;
+    }
+    air_to_floor
+    {
+        type            fixedFluxPressure;
+        value           uniform 100000;
+        p0              $internalField;
+        U               U;
+        phi             phi;
+        rho             rho;
+        psi             none;
+        gamma           0;
+    }
+    air_to_solid
+    {
+        type            fixedFluxPressure;
+        value           uniform 100000;
+        p0              $internalField;
+        U               U;
+        phi             phi;
+        rho             rho;
+        psi             none;
+        gamma           0;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/floor/T b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/floor/T
new file mode 100644
index 0000000000..1d58b33800
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/floor/T
@@ -0,0 +1,83 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/floor";
+    object      T;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [ 0 0 0 1 0 0 0 ];
+
+internalField   uniform 300;
+
+boundaryField
+{
+    maxY
+    {
+        type            zeroGradient;
+        value           uniform 300;
+    }
+    minX
+    {
+        type            zeroGradient;
+        value           uniform 300;
+    }
+    maxX
+    {
+        type            zeroGradient;
+        value           uniform 300;
+    }
+    minY
+    {
+        type            zeroGradient;
+        value           uniform 300;
+    }
+    minZ
+    {
+        type            externalWallHeatFluxTemperature;
+        value           uniform 300;
+        kappa           solidThermo;
+        Ta              uniform 313;
+        h               uniform 1000000;
+        thicknessLayers ( 1 2 );
+        kappaLayers     ( 100 200 );
+        kappaName       none;
+    }
+    floor_to_domain3
+    {
+        type            zeroGradient;
+        value           uniform 300;
+    }
+    floor_to_air
+    {
+        type            compressible::turbulentTemperatureRadCoupledMixed;
+        value           uniform 300;
+        Tnbr            T;
+        kappa           solidThermo;
+        QrNbr           Qr;
+        Qr              none;
+        kappaName       none;
+    }
+    floor_to_solid
+    {
+        type            compressible::turbulentTemperatureRadCoupledMixed;
+        value           uniform 300;
+        Tnbr            T;
+        kappa           solidThermo;
+        QrNbr           none;
+        Qr              none;
+        kappaName       none;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/floor/p b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/floor/p
new file mode 100644
index 0000000000..d8f4450148
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/floor/p
@@ -0,0 +1,67 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/floor";
+    object      p;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [1 -1 -2 0 0 0 0];
+
+internalField   uniform 100000;
+
+boundaryField
+{
+    maxY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    maxX
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minY
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    minZ
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    floor_to_domain3
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    floor_to_air
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    floor_to_solid
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/solid/T b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/solid/T
new file mode 100644
index 0000000000..fb8448ef20
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/solid/T
@@ -0,0 +1,52 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/solid";
+    object      T;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [ 0 0 0 1 0 0 0 ];
+
+internalField   uniform 300;
+
+boundaryField
+{
+    solid_to_domain3
+    {
+        type            fixedValue;
+        value           uniform 300;
+    }
+    solid_to_air
+    {
+        type            compressible::turbulentTemperatureRadCoupledMixed;
+        value           uniform 300;
+        Tnbr            T;
+        kappa           solidThermo;
+        QrNbr           Qr;
+        Qr              none;
+        kappaName       none;
+    }
+    solid_to_floor
+    {
+        type            compressible::turbulentTemperatureRadCoupledMixed;
+        value           uniform 300;
+        Tnbr            T;
+        kappa           solidThermo;
+        QrNbr           none;
+        Qr              none;
+        kappaName       none;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/solid/p b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/solid/p
new file mode 100644
index 0000000000..cfca2b8f3b
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/0/solid/p
@@ -0,0 +1,42 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    location    "0/solid";
+    object      p;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [1 -1 -2 0 0 0 0];
+
+internalField   uniform 100000;
+
+boundaryField
+{
+    solid_to_domain3
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    solid_to_air
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+    solid_to_floor
+    {
+        type            calculated;
+        value           uniform 0;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allclean b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allclean
new file mode 100755
index 0000000000..c90b8ceb13
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allclean
@@ -0,0 +1,33 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+
+# Source tutorial clean functions
+. $WM_PROJECT_DIR/bin/tools/CleanFunctions
+
+cleanCase
+
+rm -rf VTK
+rm -rf constant/cellToRegion constant/polyMesh/sets
+
+rm -rf constant/air/polyMesh
+rm -rf constant/solid/polyMesh
+rm -rf constant/floor/polyMesh
+rm -rf constant/triSurface
+
+rm -f constant/air/F
+rm -f constant/air/constructMap*
+rm -f constant/air/finalAgglom
+rm -f constant/air/globalFaceFaces
+rm -f constant/air/mapDist
+rm -f constant/air/visibleFaceFaces
+
+rm -f 0/air/facesAgglomeration
+rm -f 0/air/viewFactorField
+rm -f 0/air/cellToRegion
+rm -f 0/floor/cellToRegion
+rm -f 0/solid/cellToRegion
+rm -f 0/cellToRegion
+
+
+
+# ----------------------------------------------------------------- end-of-file
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allrun b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allrun
new file mode 100755
index 0000000000..42f495ac5f
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allrun
@@ -0,0 +1,34 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+
+
+# Source tutorial run functions
+. $WM_PROJECT_DIR/bin/tools/RunFunctions
+
+
+# Setup case
+./Allrun.pre
+
+#-- Run on single processor
+
+# Agglomerate patch faces
+for i in air
+do
+    faceAgglomerate -region $i -dict constant/viewFactorsDict > log.faceAgglomerate.$i 2>&1
+done
+
+# Generate view factors
+for i in air
+do
+    viewFactorsGen -region $i > log.viewFactorsGen.$i 2>&1
+done
+
+runApplication `getApplication`
+
+
+echo
+echo "creating files for paraview post-processing"
+echo
+paraFoam -touchAll
+
+# ----------------------------------------------------------------- end-of-file
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allrun.pre b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allrun.pre
new file mode 100755
index 0000000000..59a0bb8730
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/Allrun.pre
@@ -0,0 +1,29 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+
+
+# Source tutorial run functions
+. $WM_PROJECT_DIR/bin/tools/RunFunctions
+
+runApplication blockMesh
+runApplication topoSet
+runApplication splitMeshRegions -cellZones -overwrite
+
+# Remove unwanted region
+rm -r 0/domain3
+rm -r constant/domain3
+rm -r system/domain3
+
+# remove fluid fields from solid regions (important for post-processing)
+for i in solid floor
+do
+   rm -f 0*/$i/{rho,mut,alphat,epsilon,k,U,p_rgh,Qr,G,IDefault}
+done
+
+for i in air solid floor
+do
+    changeDictionary -region $i > log.changeDictionary.$i 2>&1
+done
+
+
+# ----------------------------------------------------------------- end-of-file
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/boundaryRadiationProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/boundaryRadiationProperties
new file mode 100644
index 0000000000..ec0ef75859
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/boundaryRadiationProperties
@@ -0,0 +1,50 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    object      boundaryRadiationProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 0 0 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    ".*"
+    {
+        type            boundaryRadiation;
+        mode            lookup;
+        emissivity      uniform 1.0;
+        absorptivity    uniform 0.0;
+        transmissivity  uniform 1.0;
+
+        value           uniform 0.0;
+    }
+
+    air_to_solid
+    {
+        type            boundaryRadiation;
+        mode            solidRadiation;
+        value           uniform 0;
+    }
+
+    air_to_floor
+    {
+        type            boundaryRadiation;
+        mode            solidRadiation;
+        value           uniform 0;
+    }
+
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/g b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/g
new file mode 100644
index 0000000000..0648d5baf9
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/g
@@ -0,0 +1,20 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       uniformDimensionedVectorField;
+    object      g;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 1 -2 0 0 0 0];
+value           (0 0 -9.81);
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/radiationProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/radiationProperties
new file mode 100644
index 0000000000..3605fbe68e
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/radiationProperties
@@ -0,0 +1,97 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant";
+    object      radiationProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+radiation       on;
+
+radiationModel  solarLoad;
+
+solarLoadCoeffs
+{
+    useVFbeamToDiffuse  true;
+
+    sunDirectionModel   sunDirTraking;//sunDirConstant;
+
+    // Time interval to update Sun position (sec)
+    sunTrackingUpdateInterval 800;
+
+    // Sun ray direction. Give the sunDirection or calculated using the
+    // solar calculator
+
+    //sunDirection        (-1 1 -1);
+
+    localStandardMeridian   9;      // GMT offset (hours)
+    startDay                204;    // day of the year
+    startTime               15;     // time of the day (hours decimal)
+    longitude               139.74; // longitude (degrees)
+    latitude                35.658; // latitude (degrees)
+
+    // Grid orientation
+    gridUp                  (0 0 1);
+    gridEast                (1 0 0);
+
+    // Energy spectrum
+    spectralDistribution (1 1);
+
+    // Solar model:
+    // sunLoadConstant-sunLoadFairWeatherConditions-SunLoadTheoreticalMaximum;
+    sunLoadModel sunLoadFairWeatherConditions;
+
+    // Sun load constant model
+    directSolarRad  500;
+    diffuseSolarRad 40;
+
+    // Fair Weather Conditions Model Constants.
+    // Calculate beta from the Solar calculator or input
+    A       300;        // Apparent solar irradiation at air mass m = 0
+    B       0.142;      // Atmospheric extinction coefficient
+    //beta    45;       // Solar altitude (in degrees) above the horizontal
+
+    // Theoretical maximum model constants
+    Setrn       10;
+    SunPrime    1;
+
+    // Ground reflectivity
+    groundReflectivity 0.2;
+
+    // Solar diffusivity constants
+    C   0.058;  // Model constant
+
+    // Radiative flux coupling flags
+    solidCoupled    true;  //Couple through Qr the solid regions (default true)
+    wallCoupled     false; //Couple through Qr wall patches (default false)
+}
+
+
+viewFactorCoeffs
+{
+    smoothing true; //Smooth view factor matrix (use when in a close surface
+                    //to force Sum(Fij = 1)
+    constantEmissivity true; //constant emissivity on surfaces.
+}
+
+// Number of flow iterations per radiation iteration
+solverFreq 1;
+
+absorptionEmissionModel none;
+
+scatterModel    none;
+
+sootModel       none;
+
+transmissivityModel none;
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/thermophysicalProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/thermophysicalProperties
new file mode 100644
index 0000000000..c293c032a3
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/thermophysicalProperties
@@ -0,0 +1,49 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant/bottomAir";
+    object      thermophysicalProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+thermoType
+{
+    type            heRhoThermo;
+    mixture         pureMixture;
+    transport       const;
+    thermo          hConst;
+    equationOfState perfectGas;
+    specie          specie;
+    energy          sensibleEnthalpy;
+}
+
+mixture
+{
+    specie
+    {
+        nMoles          1;
+        molWeight       28.9;
+    }
+    thermodynamics
+    {
+        Cp              1000;
+        Hf              0;
+    }
+    transport
+    {
+        mu              1.8e-05;
+        Pr              0.7;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/turbulenceProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/turbulenceProperties
new file mode 100644
index 0000000000..4c9278533f
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/turbulenceProperties
@@ -0,0 +1,26 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      turbulenceProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+simulationType  RAS;
+
+RAS
+{
+    RASModel    kEpsilon;
+    turbulence  on;
+    printCoeffs on;
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/viewFactorsDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/viewFactorsDict
new file mode 100644
index 0000000000..e2283d0d37
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/viewFactorsDict
@@ -0,0 +1,22 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      viewFactorsDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+writeViewFactorMatrix     true;
+writeFacesAgglomeration   true;
+writePatchViewFactors     false;
+
+maxDynListLength     200000;
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/floor/radiationProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/floor/radiationProperties
new file mode 100644
index 0000000000..5b45489c90
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/floor/radiationProperties
@@ -0,0 +1,42 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant";
+    object      radiationProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+radiation       on;
+
+radiationModel  opaqueSolid;
+
+absorptionEmissionModel multiBandSolidAbsorptionEmission;
+
+multiBandSolidAbsorptionEmissionCoeffs
+{
+    absorptivity    (0.7 0.7);
+    emissivity      (0.7 0.7);
+}
+
+transmissivityModel     multiBandSolidTransmissivity;
+
+multiBandSolidTransmissivityCoeffs
+{
+    transmissivity    (0 0);
+}
+
+scatterModel    none;
+
+sootModel none;
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/floor/thermophysicalProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/floor/thermophysicalProperties
new file mode 100644
index 0000000000..894a9f39be
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/floor/thermophysicalProperties
@@ -0,0 +1,53 @@
+/*--------------------------------*- C++ -*----------------------------------* \
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      thermophysicalProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+thermoType
+{
+    type            heSolidThermo;
+    mixture         pureMixture;
+    transport       constIso;
+    thermo          hConst;
+    equationOfState rhoConst;
+    specie          specie;
+    energy          sensibleEnthalpy;
+}
+
+mixture
+{
+    specie
+    {
+        nMoles      1;
+        molWeight   12;
+    }
+
+    transport
+    {
+        kappa   80;
+    }
+
+    thermodynamics
+    {
+        Hf      0;
+        Cp      450;
+    }
+
+    equationOfState
+    {
+        rho     8000;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh.old/blockMeshDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh.old/blockMeshDict
new file mode 100644
index 0000000000..782567fbd4
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh.old/blockMeshDict
@@ -0,0 +1,96 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      blockMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+convertToMeters 1;
+
+vertices
+(
+    ( 0   0   -1)
+    ( 40  0   -1)
+    ( 40  40  -1)
+    ( 0   40  -1)
+    ( 0   0   60)
+    ( 40  0   60)
+    ( 40  40  60)
+    ( 0   40  60)
+);
+
+blocks
+(
+    hex (0 1 2 3 4 5 6 7) (30 30 45) simpleGrading (1 1 1)
+);
+
+edges
+(
+);
+
+boundary
+(
+    maxY
+    {
+        type patch;
+        faces
+        (
+            (3 7 6 2)
+        );
+    }
+    minX
+    {
+        type patch;
+        faces
+        (
+            (0 4 7 3)
+        );
+    }
+    maxX
+    {
+        type patch;
+        faces
+        (
+            (2 6 5 1)
+        );
+    }
+    minY
+    {
+        type patch;
+        faces
+        (
+            (1 5 4 0)
+        );
+    }
+    minZ
+    {
+        type wall;
+        faces
+        (
+            (0 3 2 1)
+        );
+    }
+    maxZ
+    {
+        type patch;
+        faces
+        (
+            (4 5 6 7)
+        );
+    }
+);
+
+mergePatchPairs
+(
+);
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh.old/boundary b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh.old/boundary
new file mode 100644
index 0000000000..b48b28b598
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh.old/boundary
@@ -0,0 +1,59 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       polyBoundaryMesh;
+    location    "constant/polyMesh";
+    object      boundary;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+6
+(
+    maxY
+    {
+        type            patch;
+        nFaces          1350;
+        startFace       117900;
+    }
+    minX
+    {
+        type            patch;
+        nFaces          1350;
+        startFace       119250;
+    }
+    maxX
+    {
+        type            patch;
+        nFaces          1350;
+        startFace       120600;
+    }
+    minY
+    {
+        type            patch;
+        nFaces          1350;
+        startFace       121950;
+    }
+    minZ
+    {
+        type            wall;
+        inGroups        1(wall);
+        nFaces          900;
+        startFace       123300;
+    }
+    maxZ
+    {
+        type            patch;
+        nFaces          900;
+        startFace       124200;
+    }
+)
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh/boundary b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh/boundary
new file mode 100644
index 0000000000..b48b28b598
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/polyMesh/boundary
@@ -0,0 +1,59 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev-OpenCFD                           |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       polyBoundaryMesh;
+    location    "constant/polyMesh";
+    object      boundary;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+6
+(
+    maxY
+    {
+        type            patch;
+        nFaces          1350;
+        startFace       117900;
+    }
+    minX
+    {
+        type            patch;
+        nFaces          1350;
+        startFace       119250;
+    }
+    maxX
+    {
+        type            patch;
+        nFaces          1350;
+        startFace       120600;
+    }
+    minY
+    {
+        type            patch;
+        nFaces          1350;
+        startFace       121950;
+    }
+    minZ
+    {
+        type            wall;
+        inGroups        1(wall);
+        nFaces          900;
+        startFace       123300;
+    }
+    maxZ
+    {
+        type            patch;
+        nFaces          900;
+        startFace       124200;
+    }
+)
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/regionProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/regionProperties
new file mode 100644
index 0000000000..817e542e34
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/regionProperties
@@ -0,0 +1,24 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant";
+    object      regionProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+regions
+(
+    fluid       (air )
+    solid       (solid floor)
+);
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/solid/radiationProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/solid/radiationProperties
new file mode 100644
index 0000000000..5b45489c90
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/solid/radiationProperties
@@ -0,0 +1,42 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant";
+    object      radiationProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+radiation       on;
+
+radiationModel  opaqueSolid;
+
+absorptionEmissionModel multiBandSolidAbsorptionEmission;
+
+multiBandSolidAbsorptionEmissionCoeffs
+{
+    absorptivity    (0.7 0.7);
+    emissivity      (0.7 0.7);
+}
+
+transmissivityModel     multiBandSolidTransmissivity;
+
+multiBandSolidTransmissivityCoeffs
+{
+    transmissivity    (0 0);
+}
+
+scatterModel    none;
+
+sootModel none;
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/solid/thermophysicalProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/solid/thermophysicalProperties
new file mode 100644
index 0000000000..fcda1ec61b
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/solid/thermophysicalProperties
@@ -0,0 +1,53 @@
+/*--------------------------------*- C++ -*----------------------------------* \
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      thermophysicalProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+thermoType
+{
+    type            heSolidThermo;
+    mixture         pureMixture;
+    transport       constIso;
+    thermo          hConst;
+    equationOfState rhoConst;
+    specie          specie;
+    energy          sensibleEnthalpy;
+}
+
+mixture
+{
+    specie
+    {
+        nMoles      1;
+        molWeight   12;
+    }
+
+    transport
+    {
+        kappa   80;
+    }
+
+    thermodynamics
+    {
+        Hf      0;
+        Cp      250;
+    }
+
+    equationOfState
+    {
+        rho     5000;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/changeDictionaryDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/changeDictionaryDict
new file mode 100644
index 0000000000..3591ea2f5f
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/changeDictionaryDict
@@ -0,0 +1,177 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      changeDictionaryDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dictionaryReplacement
+{
+    boundary
+    {
+        air_to_floor
+        {
+            inGroups    2(wall viewFactorWall);
+        }
+
+        air_to_solid
+        {
+            inGroups    2(wall viewFactorWall);
+        }
+    }
+    U
+    {
+        boundaryField
+        {
+             ".*"
+            {
+                type            pressureInletOutletVelocity;
+                value           uniform (0 0 0);
+                phi             phi;
+            }
+
+            region0_to_floor_floor_zone
+            {
+                type            fixedValue;
+                value           uniform (0 0 0);
+            }
+            "air.*"
+            {
+                type            fixedValue;
+                value           uniform (0 0 0);
+            }
+        }
+    }
+
+    T
+    {
+        internalField   uniform 300;
+        boundaryField
+        {
+             ".*"
+            {
+                type            inletOutlet;
+                value           uniform 300;
+                inletValue      uniform 300;
+            }
+
+            "air.*"
+            {
+                type            compressible::turbulentTemperatureRadCoupledMixed;
+                Tnbr            T;
+                kappa           fluidThermo;
+                QrNbr           none;
+                Qr              Qr;
+                kappaName       none;
+                value           uniform 300;
+            }
+        }
+    }
+
+    epsilon
+    {
+        internalField   uniform 0.01;
+        boundaryField
+        {
+             ".*"
+            {
+                type            inletOutlet;
+                inletValue      uniform 0.01;
+                value           uniform 0.01;
+            }
+
+            "air.*"
+            {
+                type            epsilonWallFunction;
+                value           uniform 0.01;
+            }
+
+        }
+    }
+
+    k
+    {
+        internalField   uniform 0.1;
+        boundaryField
+        {
+             ".*"
+            {
+                type            inletOutlet;
+                inletValue      uniform 0.1;
+                value           uniform 0.1;
+            }
+
+            "air.*"
+            {
+                type            kqRWallFunction;
+                value           uniform 0.1;
+            }
+
+        }
+    }
+
+    p_rgh
+    {
+        internalField   uniform 1e5;
+        boundaryField
+        {
+            ".*"
+            {
+                type            totalPressure;
+                p0              $internalField;
+                U               U;
+                phi             phi;
+                rho             rho;
+                psi             none;
+                gamma           0;
+                value           $internalField;
+            }
+
+            "air.*"
+            {
+                type            fixedFluxPressure;
+                value           uniform 1e5;
+            }
+
+        }
+    }
+
+    p
+    {
+        internalField   uniform 1e5;
+        boundaryField
+        {
+            ".*"
+            {
+                type            calculated;
+                value           uniform 1e5;
+            }
+        }
+    }
+
+    IDefault
+    {
+        internalField   uniform 0;
+        boundaryField
+        {
+            ".*"
+            {
+                type            greyDiffusiveRadiation;
+                value           uniform 0;
+            }
+        }
+    }
+
+
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/decomposeParDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/decomposeParDict
new file mode 100644
index 0000000000..f051e7b79a
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/decomposeParDict
@@ -0,0 +1,44 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    note        "mesh decomposition control dictionary";
+    location    "system";
+    object      decomposeParDict;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+numberOfSubdomains  4;
+
+method          scotch;
+
+simpleCoeffs
+{
+    n           (2 2 1);
+    delta       0.001;
+}
+
+hierarchicalCoeffs
+{
+    n           (2 2 1);
+    delta       0.001;
+    order       xyz;
+}
+
+
+manualCoeffs
+{
+    dataFile    "decompositionData";
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/fvSchemes b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/fvSchemes
new file mode 100644
index 0000000000..d59dd30808
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/fvSchemes
@@ -0,0 +1,64 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSchemes;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+ddtSchemes
+{
+    default     Euler;
+}
+
+gradSchemes
+{
+    default         Gauss linear;
+}
+
+divSchemes
+{
+    default         none;
+
+    div(phi,U)          Gauss upwind;
+    div(phi,K)          Gauss upwind;
+    div(phi,h)          Gauss upwind;
+    div(phi,k)          Gauss upwind;
+    div(phi,K)          Gauss upwind;
+    div(phi,epsilon)    Gauss upwind;
+    div(phi,R)          Gauss upwind;
+    div(R)              Gauss linear;
+    div(Ji,Ii_h)        Gauss linearUpwind grad(U);
+    div(((rho*nuEff)*dev2(T(grad(U))))) Gauss linear;
+}
+
+laplacianSchemes
+{
+    default         Gauss linear corrected;
+}
+
+interpolationSchemes
+{
+    default         linear;
+}
+
+snGradSchemes
+{
+    default         corrected;
+}
+
+fluxRequired
+{
+    default         no;
+    p_rgh;
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/fvSolution b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/fvSolution
new file mode 100644
index 0000000000..3515a9618e
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/fvSolution
@@ -0,0 +1,73 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+solvers
+{
+    "rho.*"
+    {
+        solver          PCG;
+        preconditioner  DIC;
+        tolerance       0;
+        relTol          0;
+    }
+
+    p_rgh
+    {
+        solver          PCG;
+        preconditioner  DIC;
+        tolerance       1e-7;
+        relTol          0.05;
+    }
+
+    p_rghFinal
+    {
+        $p_rgh;
+        relTol          0;
+    }
+
+    "(U|h|e|k|epsilon|R)"
+    {
+        solver          PBiCG;
+        preconditioner  DILU;
+        tolerance       1e-6;
+        relTol          0.1;
+    }
+
+    "(U|h|e|k|epsilon|R)Final"
+    {
+        $U;
+        relTol          0;
+    }
+}
+
+PIMPLE
+{
+    momentumPredictor no;
+    nOuterCorrectors 0;
+    nCorrectors     2;
+    nNonOrthogonalCorrectors 0;
+}
+
+relaxationFactors
+{
+    equations
+    {
+        ".*"               1;
+    }
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/blockMeshDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/blockMeshDict
new file mode 100644
index 0000000000..782567fbd4
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/blockMeshDict
@@ -0,0 +1,96 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      blockMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+convertToMeters 1;
+
+vertices
+(
+    ( 0   0   -1)
+    ( 40  0   -1)
+    ( 40  40  -1)
+    ( 0   40  -1)
+    ( 0   0   60)
+    ( 40  0   60)
+    ( 40  40  60)
+    ( 0   40  60)
+);
+
+blocks
+(
+    hex (0 1 2 3 4 5 6 7) (30 30 45) simpleGrading (1 1 1)
+);
+
+edges
+(
+);
+
+boundary
+(
+    maxY
+    {
+        type patch;
+        faces
+        (
+            (3 7 6 2)
+        );
+    }
+    minX
+    {
+        type patch;
+        faces
+        (
+            (0 4 7 3)
+        );
+    }
+    maxX
+    {
+        type patch;
+        faces
+        (
+            (2 6 5 1)
+        );
+    }
+    minY
+    {
+        type patch;
+        faces
+        (
+            (1 5 4 0)
+        );
+    }
+    minZ
+    {
+        type wall;
+        faces
+        (
+            (0 3 2 1)
+        );
+    }
+    maxZ
+    {
+        type patch;
+        faces
+        (
+            (4 5 6 7)
+        );
+    }
+);
+
+mergePatchPairs
+(
+);
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/controlDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/controlDict
new file mode 100644
index 0000000000..268b560899
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/controlDict
@@ -0,0 +1,52 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      controlDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+application     chtMultiRegionFoam;
+
+startFrom       startTime;
+
+startTime       0;
+
+stopAt          endTime;
+
+endTime         18000;
+
+deltaT          10;
+
+writeControl    adjustableRunTime;
+
+writeInterval   800;
+
+purgeWrite      0;
+
+writeFormat     ascii;
+
+writePrecision  7;
+
+writeCompression uncompressed;
+
+timeFormat      general;
+
+timePrecision   6;
+
+runTimeModifiable true;
+
+adjustTimeStep  yes;
+
+maxCo           15;
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/decomposeParDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/decomposeParDict
new file mode 100644
index 0000000000..c122b39b27
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/decomposeParDict
@@ -0,0 +1,50 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    note        "mesh decomposition control dictionary";
+    location    "system";
+    object      decomposeParDict;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+numberOfSubdomains  4;
+
+//- Keep owner and neighbour on same processor for faces in zones:
+// preserveFaceZones (heater solid1 solid3);
+
+method          scotch;
+
+
+simpleCoeffs
+{
+    n           (2 2 1);
+    delta       0.001;
+}
+
+hierarchicalCoeffs
+{
+    n           (2 2 1);
+    delta       0.001;
+    order       xyz;
+}
+
+scotchCoeffs
+{
+}
+
+manualCoeffs
+{
+    dataFile    "decompositionData";
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/extrudeToRegionMeshDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/extrudeToRegionMeshDict
new file mode 100644
index 0000000000..55ccf9ef40
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/extrudeToRegionMeshDict
@@ -0,0 +1,40 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      extrudeToRegionMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+region          floor;
+
+faceZones       (floor_zone);
+
+oneD            false;
+
+sampleMode      nearestPatchFace;
+
+oneDPolyPatchType empty; //wedge
+
+extrudeModel    linearNormal;
+
+nLayers         5;
+
+expansionRatio  1;
+
+adaptMesh       true; // mapped for both
+
+linearNormalCoeffs
+{
+    thickness       1;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/changeDictionaryDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/changeDictionaryDict
new file mode 100644
index 0000000000..cb68f1fb2d
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/changeDictionaryDict
@@ -0,0 +1,81 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      changeDictionaryDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dictionaryReplacement
+{
+    boundary
+    {
+        floor_to_domain3
+        {
+            type        patch;
+        }
+    }
+    T
+    {
+        internalField   uniform 300;
+
+        boundaryField
+        {
+            ".*"
+            {
+                type    zeroGradient;
+                value   uniform 300;
+            }
+
+            floor_to_solid
+            {
+                type            compressible::turbulentTemperatureRadCoupledMixed;
+                Tnbr            T;
+                kappa           solidThermo;
+                QrNbr           none;
+                Qr              none;
+                kappaName       none;
+                value           uniform 300;
+            }
+
+            floor_to_air
+            {
+                type            compressible::turbulentTemperatureRadCoupledMixed;
+                Tnbr            T;
+                kappa           solidThermo;
+                QrNbr           Qr;
+                Qr              none;
+                kappaName       none;
+                value           uniform 300;
+            }
+
+            floor_to_domain3
+            {
+                type    zeroGradient;
+                value   uniform 300;
+            }
+
+            minZ
+            {
+                type            externalWallHeatFluxTemperature;
+                kappa           solidThermo;
+                Ta              uniform 313.0;
+                h               uniform 10e5;
+                thicknessLayers (1 2);
+                kappaLayers     (100 200);
+                value           uniform 300.0;
+                kappaName       none;
+            }
+        }
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/decomposeParDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/decomposeParDict
new file mode 100644
index 0000000000..f051e7b79a
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/decomposeParDict
@@ -0,0 +1,44 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    note        "mesh decomposition control dictionary";
+    location    "system";
+    object      decomposeParDict;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+numberOfSubdomains  4;
+
+method          scotch;
+
+simpleCoeffs
+{
+    n           (2 2 1);
+    delta       0.001;
+}
+
+hierarchicalCoeffs
+{
+    n           (2 2 1);
+    delta       0.001;
+    order       xyz;
+}
+
+
+manualCoeffs
+{
+    dataFile    "decompositionData";
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/fvSchemes b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/fvSchemes
new file mode 100644
index 0000000000..c83d3738bc
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/fvSchemes
@@ -0,0 +1,53 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSchemes;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+ddtSchemes
+{
+    default     Euler;
+}
+
+gradSchemes
+{
+    default     Gauss linear;
+}
+
+divSchemes
+{
+    default     none;
+}
+
+laplacianSchemes
+{
+    default             none;
+    laplacian(alpha,h)  Gauss linear corrected;
+}
+
+interpolationSchemes
+{
+    default         linear;
+}
+
+snGradSchemes
+{
+    default         corrected;
+}
+
+fluxRequired
+{
+    default         no;
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/fvSolution b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/fvSolution
new file mode 100644
index 0000000000..abf98a73f6
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/fvSolution
@@ -0,0 +1,44 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+solvers
+{
+    "h.*"
+    {
+        solver           PCG;
+        preconditioner   DIC;
+        tolerance        1e-06;
+        relTol           0;
+    }
+}
+
+PIMPLE
+{
+    nNonOrthogonalCorrectors 0;
+}
+
+relaxationFactors
+{
+    fields
+    {
+    }
+    equations
+    {
+        h               1;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/fvSchemes b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/fvSchemes
new file mode 100644
index 0000000000..e7d321e959
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/fvSchemes
@@ -0,0 +1,46 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSchemes;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+ddtSchemes
+{
+}
+
+gradSchemes
+{
+}
+
+divSchemes
+{
+}
+
+laplacianSchemes
+{
+}
+
+interpolationSchemes
+{
+}
+
+snGradSchemes
+{
+}
+
+fluxRequired
+{
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/fvSolution b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/fvSolution
new file mode 100644
index 0000000000..77941ca7b4
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/fvSolution
@@ -0,0 +1,21 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+PIMPLE
+{
+
+}
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/changeDictionaryDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/changeDictionaryDict
new file mode 100644
index 0000000000..c1f17e9603
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/changeDictionaryDict
@@ -0,0 +1,63 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      changeDictionaryDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dictionaryReplacement
+{
+    boundary
+    {
+        solid_to_domain3
+        {
+            type        patch;
+        }
+    }
+    T
+    {
+        internalField   uniform 300;
+
+        boundaryField
+        {
+            solid_to_air
+            {
+                type            compressible::turbulentTemperatureRadCoupledMixed;
+                Tnbr            T;
+                kappa           solidThermo;
+                QrNbr           Qr;
+                Qr              none;
+                kappaName       none;
+                value           uniform 300;
+            }
+
+            solid_to_floor
+            {
+                type            compressible::turbulentTemperatureRadCoupledMixed;
+                Tnbr            T;
+                kappa           solidThermo;
+                QrNbr           none;
+                Qr              none;
+                kappaName       none;
+                value           uniform 300;
+            }
+
+            solid_to_domain3
+            {
+                type            fixedValue;
+                value           uniform 300.0;
+            }
+        }
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/decomposeParDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/decomposeParDict
new file mode 100644
index 0000000000..f051e7b79a
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/decomposeParDict
@@ -0,0 +1,44 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    note        "mesh decomposition control dictionary";
+    location    "system";
+    object      decomposeParDict;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+numberOfSubdomains  4;
+
+method          scotch;
+
+simpleCoeffs
+{
+    n           (2 2 1);
+    delta       0.001;
+}
+
+hierarchicalCoeffs
+{
+    n           (2 2 1);
+    delta       0.001;
+    order       xyz;
+}
+
+
+manualCoeffs
+{
+    dataFile    "decompositionData";
+}
+
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/fvSchemes b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/fvSchemes
new file mode 100644
index 0000000000..578a79be7d
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/fvSchemes
@@ -0,0 +1,53 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSchemes;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+ddtSchemes
+{
+    default     Euler;
+}
+
+gradSchemes
+{
+    default         Gauss linear;
+}
+
+divSchemes
+{
+    default         none;
+}
+
+laplacianSchemes
+{
+    default             none;
+    laplacian(alpha,h)  Gauss linear corrected;
+}
+
+interpolationSchemes
+{
+    default         linear;
+}
+
+snGradSchemes
+{
+    default         corrected;
+}
+
+fluxRequired
+{
+    default         no;
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/fvSolution b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/fvSolution
new file mode 100644
index 0000000000..db7d6546e4
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/fvSolution
@@ -0,0 +1,44 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+solvers
+{
+    "h.*"
+    {
+        solver           PCG;
+        preconditioner   DIC;
+        tolerance        1e-06;
+        relTol           0.;
+    }
+}
+
+PIMPLE
+{
+    nNonOrthogonalCorrectors 0;
+}
+
+relaxationFactors
+{
+    fields
+    {
+    }
+    equations
+    {
+        h              1;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/topoSetDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/topoSetDict
new file mode 100644
index 0000000000..aef6506a1f
--- /dev/null
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/topoSetDict
@@ -0,0 +1,131 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      topoSetDict;
+}
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+actions
+(
+
+    // solid
+    {
+        name    solid;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        sourceInfo
+        {
+            box (15.5  15.5 0)(24.5 24.5 9);
+        }
+    }
+
+    // floor
+    {
+        name    floor;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        sourceInfo
+        {
+            box (0  0 -2)(41 41 0);
+        }
+    }
+
+     {
+        name    floor;
+        type    cellZoneSet;
+        action  new;
+        source  setToCellZone;
+        sourceInfo
+        {
+           set floor;
+        }
+    }
+
+    //air
+    {
+        name    solid;
+        type    cellSet;
+        action  invert;
+    }
+
+    {
+        name    solid;
+        type    cellSet;
+        action  delete;
+        source  cellToCell;
+        sourceInfo
+        {
+           set floor;
+        }
+    }
+
+    {
+        name    air;
+        type    cellZoneSet;
+        action  new;
+        source  setToCellZone;
+        sourceInfo
+        {
+            set solid;           // name of cellSet
+        }
+    }
+
+    {
+        name    cavity;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        sourceInfo
+        {
+            box (17  17 0)(23 23 7.5);
+        }
+    }
+
+    //- Define again solid
+    {
+        name    solid;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        sourceInfo
+        {
+            box (15.5  15.5 0)(24.5 24.5 9);
+        }
+    }
+
+    {
+        name    solid;
+        type    cellSet;
+        action  delete;
+        source  cellToCell;
+        sourceInfo
+        {
+           set cavity;
+        }
+    }
+
+    {
+        name    solid;
+        type    cellZoneSet;
+        action  new;
+        source  setToCellZone;
+        sourceInfo
+        {
+            set solid;           // name of cellSet
+        }
+    }
+);
+
+// ************************************************************************* //
diff --git a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G
index a7c3929dd9..08aa019d77 100644
--- a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G
+++ b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/0/G
@@ -24,25 +24,16 @@ boundaryField
     top
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
     bottom
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
     walls
     {
         type            MarshakRadiation;
-        T               T;
-        emissivityMode  lookup;
-        emissivity      uniform 1.0;
         value           uniform 0;
     }
     symmetry
diff --git a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/boundaryRadiationProperties b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/boundaryRadiationProperties
new file mode 100644
index 0000000000..7f91d4e527
--- /dev/null
+++ b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/boundaryRadiationProperties
@@ -0,0 +1,41 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    object      boundaryRadiationProperties;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 0 0 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    ".*"
+    {
+        type            boundaryRadiation;
+        mode            lookup;
+        emissivity      uniform 1.0;
+        absorptivity    uniform 0.0;
+        value           uniform 0.0;
+    }
+     symmetry
+    {
+        type            symmetryPlane;
+    }
+    frontAndBack
+    {
+        type            empty;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/radiationProperties b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/radiationProperties
index 979d92116c..d087edc1df 100644
--- a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/radiationProperties
+++ b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/radiationProperties
@@ -63,5 +63,6 @@ cloudScatterCoeffs
     );
 }
 
+transmissivityModel none;
 
 // ************************************************************************* //