ENH: New vibro-acoustic model suite

- New solver: `acousticFoam`
  - New base finite-area region class: `regionFaModel`
  - New base shell model classes:
    - `vibrationShellModel`
    - `thermalShellModel`
  - New shell models:
    - A vibration-shell model: `KirchhoffShell`
    - A thermal-shell model: `thermalShell`
  - New finite-area/finite-volume boundary conditions:
    - `clampedPlate`
    - `timeVaryingFixedValue`
    - `acousticWaveTransmissive`
  - New base classes for `fvOption` of finite-area methods: `faOption`
  - New `faOption`s:
    - `contactHeatFluxSource`
    - `externalFileSource`
    - `externalHeatFluxSource`
    - `jouleHeatingSource`
  - New tutorial: `compressible/acousticFoam/obliqueAirJet`

Signed-off-by: Kutalmis Bercin <kutalmis.bercin@esi-group.com>

applications/solvers/acoustic/acousticFoam/Make/files

@@ -0,0 +1,3 @@
+acousticFoam.C
+
+EXE = $(FOAM_APPBIN)/acousticFoam

applications/solvers/acoustic/acousticFoam/Make/options

@@ -0,0 +1,14 @@
+EXE_INC = \
+    -I$(LIB_SRC)/finiteVolume/lnInclude \
+    -I$(LIB_SRC)/fvOption/lnInclude \
+    -I$(LIB_SRC)/regionFaModels/lnInclude \
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/sampling/lnInclude \
+    -I$(LIB_SRC)/transportModels/compressible/lnInclude
+
+EXE_LIBS = \
+    -lfiniteVolume \
+    -lfvOptions \
+    -lmeshTools \
+    -lsampling \
+    -lregionFaModels

applications/solvers/acoustic/acousticFoam/acousticFoam.C

@@ -0,0 +1,99 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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/>.
+
+Application
+   acousticFoam
+
+Group
+    grpAcousticSolvers
+
+Description
+    Acoustic solver solving the acoustic pressure wave equation.
+
+    \f[
+        \ddt2{pa} - c^2 \laplacian{pa} = 0
+    \f]
+
+    where
+    \vartable
+        c       | Sound speed
+        pa      | Acoustic pressure
+    \endvartable
+
+SourceFiles
+    acousticFoam.C
+
+\*---------------------------------------------------------------------------*/
+
+#include "fvCFD.H"
+#include "fvOptions.H"
+#include "pimpleControl.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+int main(int argc, char *argv[])
+{
+    argList::addNote
+    (
+        "Acoustic solver solving the acoustic pressure wave equation."
+    );
+
+    #include "postProcess.H"
+
+    #include "addCheckCaseOptions.H"
+    #include "setRootCaseLists.H"
+    #include "createTime.H"
+    #include "createMesh.H"
+    #include "createControl.H"
+    #include "createRegionControls.H"
+
+    #include "readTransportProperties.H"
+    #include "createFields.H"
+
+    Info<< "\nStarting time loop\n" << endl;
+
+    while (runTime.run())
+    {
+        ++runTime;
+
+        Info<< "Time = " << runTime.timeName() << nl << endl;
+
+        while (pimple.correct())
+        {
+            #include "paEqn.H"
+        }
+
+        runTime.write();
+
+        runTime.printExecutionTime(Info);
+    }
+
+    Info<< "End\n" << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //

applications/solvers/acoustic/acousticFoam/createFields.H

@@ -0,0 +1,15 @@
+
+Info << "\nReading pa" << endl;
+
+volScalarField pa
+(
+    IOobject
+    (
+        "pa",
+        runTime.timeName(),
+        mesh,
+        IOobject::MUST_READ,
+        IOobject::AUTO_WRITE
+    ),
+    mesh
+);

applications/solvers/acoustic/acousticFoam/createRegionControls.H

@@ -0,0 +1,8 @@
+fvSolution solutionDict(runTime);
+
+const dictionary& pimpleDict = solutionDict.subDict("PIMPLE");
+
+bool solvePrimaryRegion
+(
+    pimpleDict.getOrDefault("solvePrimaryRegion", true)
+);

applications/solvers/acoustic/acousticFoam/paEqn.H

@@ -0,0 +1,15 @@
+
+fvScalarMatrix paEqn
+(
+    fvm::d2dt2(pa) - sqr(c0)*fvc::laplacian(pa)
+);
+
+if (solvePrimaryRegion)
+{
+    paEqn.relax();
+    paEqn.solve();
+}
+else
+{
+    pa.correctBoundaryConditions();
+}

applications/solvers/acoustic/acousticFoam/readTransportProperties.H

@@ -0,0 +1,23 @@
+Info<< "\nReading transportProperties" << endl;
+
+IOdictionary transportProperties
+(
+    IOobject
+    (
+        "transportProperties",
+        runTime.constant(),
+        mesh,
+        IOobject::MUST_READ,
+        IOobject::NO_WRITE
+    )
+);
+
+dimensionedScalar c0("c0", dimVelocity, transportProperties);
+
+dimensionedScalar rho("rho", dimDensity, transportProperties);
+
+scalar MaxCo =
+    max(mesh.surfaceInterpolation::deltaCoeffs()*c0).value()
+   *runTime.deltaT().value();
+
+Info<< "Max acoustic Courant Number = " << MaxCo << endl;

applications/solvers/heatTransfer/chtMultiRegionFoam/chtMultiRegionSimpleFoam/Make/options

@@ -14,7 +14,9 @@ EXE_INC = \
     -I$(LIB_SRC)/thermophysicalModels/radiation/lnInclude \
     -I$(LIB_SRC)/TurbulenceModels/turbulenceModels/lnInclude \
     -I$(LIB_SRC)/TurbulenceModels/compressible/lnInclude \
-    -I$(LIB_SRC)/regionModels/regionModel/lnInclude
+    -I$(LIB_SRC)/sampling/lnInclude \
+    -I$(LIB_SRC)/regionModels/regionModel/lnInclude \
+    -I$(LIB_SRC)/regionFaModels/lnInclude
 
 EXE_LIBS = \
     -lfiniteVolume \
@@ -28,4 +30,8 @@ EXE_LIBS = \
     -lturbulenceModels \
     -lcompressibleTurbulenceModels \
     -lradiationModels \
-    -lregionModels
+    -lfvOptions \
+    -lfaOptions \
+    -lregionModels \
+    -lsampling \
+    -lregionFaModels

src/Allwmake

@@ -49,6 +49,7 @@ wmake $targetType fileFormats
 wmake $targetType surfMesh
 wmake $targetType meshTools
 
+wmake $targetType finiteArea
 wmake $targetType finiteVolume
 
 wmake $targetType mesh/blockMesh
@@ -85,7 +86,9 @@ regionModels/Allwmake $targetType $*
 lagrangian/Allwmake $targetType $*
 
 wmake $targetType fvOptions
+wmake $targetType faOptions
 wmake $targetType fvMotionSolver
+wmake $targetType regionFaModels
 
 wmake $targetType overset
 
@@ -97,7 +100,6 @@ wmake $targetType waveModels
 
 wmake $targetType engine
 
-wmake $targetType finiteArea
 wmake $targetType genericPatchFields
 
 conversion/Allwmake $targetType $*

src/OpenFOAM/algorithms/subCycle/subCycle.H

@@ -59,7 +59,12 @@ class subCycleField
         GeometricField& gf0_;
 
         //- Copy of the "real" old-time value of the field
-        GeometricField gf_0_;
+        tmp<GeometricField> gf_0_;
+
+        GeometricField& gf00_;
+
+        //- Copy of the "real" old-old-time value of the field
+        tmp<GeometricField> gf_00_;
 
 
 public:
@@ -71,19 +76,28 @@ public:
         :
             gf_(gf),
             gf0_(gf.oldTime()),
-            gf_0_(gf0_.name() + "_", gf0_)
-        {}
+            gf00_(gf.oldTime().oldTime())
+        {
+            {
+                gf_0_ = GeometricField::New(gf0_.name() + "_", gf0_);
+                gf_00_ = GeometricField::New(gf00_.name() + "_", gf00_);
+            }
+        }
 
 
     //- Destructor
     ~subCycleField()
+    {
+        if (gf_0_.valid())
         {
             // Reset the old-time field
             gf0_ = gf_0_;
 
+            gf00_ = gf_00_;
+
         // Correct the time index of the field to correspond to the global time
             gf_.timeIndex() = gf_.time().timeIndex();
-        gf0_.timeIndex() = gf_.time().timeIndex();
+        }
     }
 
 
@@ -96,7 +110,8 @@ public:
     void updateTimeIndex()
     {
         gf_.timeIndex() = gf_.time().timeIndex() + 1;
-        gf0_.timeIndex() = gf_.time().timeIndex() + 1;
+        gf0_.timeIndex() = gf0_.time().timeIndex() + 1;
+        gf00_.timeIndex() = gf00_.time().timeIndex() + 1;
     }
 };
 

src/OpenFOAM/db/Time/subCycleTime.C

@@ -36,8 +36,11 @@ Foam::subCycleTime::subCycleTime(Time& runTime, const label nCycles)
     total_(nCycles)
 {
     // Could avoid 0 or 1 nCycles here on construction
+    if (nCycles > 1)
+    {
         time_.subCycle(nCycles);
     }
+}
 
 
 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
@@ -63,8 +66,11 @@ bool Foam::subCycleTime::end() const
 
 
 void Foam::subCycleTime::endSubCycle()
+{
+    if (total_ > 1)
     {
         time_.endSubCycle();
+    }
 
     // If called manually, ensure status() will return false
 
@@ -89,8 +95,12 @@ bool Foam::subCycleTime::loop()
 
 Foam::subCycleTime& Foam::subCycleTime::operator++()
 {
-    ++time_;
-    ++index_;
+    if (total_ > 1)
+    {
+        time_++;
+    }
+
+    index_++;
 
     // Register index change with Time, in case someone wants this information
     time_.subCycleIndex(index_);

src/faOptions/Make/files

@@ -0,0 +1,16 @@
+faOption/faOption.C
+faOption/faOptionIO.C
+faOption/faOptionList.C
+faOption/faOptions.C
+
+faceSetOption/faceSetOption.C
+
+/* Sources */
+derivedSources=sources/derived
+
+$(derivedSources)/externalHeatFluxSource/externalHeatFluxSource.C
+$(derivedSources)/jouleHeatingSource/jouleHeatingSource.C
+$(derivedSources)/contactHeatFluxSource/contactHeatFluxSource.C
+$(derivedSources)/externalFileSource/externalFileSource.C
+
+LIB = $(FOAM_LIBBIN)/libfaOptions

src/faOptions/Make/options

@@ -0,0 +1,22 @@
+EXE_INC = \
+    -I$(LIB_SRC)/finiteArea/lnInclude \
+    -I$(LIB_SRC)/finiteVolume/lnInclude \
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/thermophysicalModels/solidThermo/lnInclude \
+    -I$(LIB_SRC)/transportModels \
+    -I$(LIB_SRC)/transportModels/compressible/lnInclude \
+    -I$(LIB_SRC)/transportModels/incompressible/lnInclude \
+    -I$(LIB_SRC)/thermophysicalModels/basic/lnInclude \
+    -I$(LIB_SRC)/thermophysicalModels/specie/lnInclude \
+    -I$(LIB_SRC)/TurbulenceModels/turbulenceModels/lnInclude \
+    -I$(LIB_SRC)/TurbulenceModels/compressible/lnInclude \
+    -I$(LIB_SRC)/TurbulenceModels/incompressible/lnInclude
+
+LIB_LIBS = \
+    -lfiniteArea \
+    -lfiniteVolume \
+    -lsampling \
+    -lmeshTools \
+    -lturbulenceModels \
+    -lincompressibleTurbulenceModels \
+    -lcompressibleTurbulenceModels

src/faOptions/faOption/faOption.C

@@ -0,0 +1,291 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "faOption.H"
+#include "areaFields.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace fa
+    {
+        defineTypeNameAndDebug(option, 0);
+        defineRunTimeSelectionTable(option, dictionary);
+    }
+}
+
+
+// * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
+
+void Foam::fa::option::constructMeshObjects()
+{
+    regionMeshPtr_.reset(new faMesh(mesh_));
+
+    vsmPtr_.reset(new volSurfaceMapping(regionMeshPtr_()));
+}
+
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::fa::option::option
+(
+    const word& name,
+    const word& modelType,
+    const dictionary& dict,
+    const fvPatch& patch
+)
+:
+    name_(name),
+    modelType_(modelType),
+    mesh_(patch.boundaryMesh().mesh()),
+    patch_(patch),
+    dict_(dict),
+    coeffs_(dict.optionalSubDict(modelType + "Coeffs")),
+    active_(dict.getOrDefault<Switch>("active", true)),
+    fieldNames_(),
+    applied_(),
+    regionName_(dict.get<word>("region")),
+    regionMeshPtr_(nullptr),
+    vsmPtr_(nullptr)
+{
+    constructMeshObjects();
+
+    Info<< incrIndent << indent << "Source: " << name_ << endl << decrIndent;
+}
+
+
+// * * * * * * * * * * * * * * * * * Selectors * * * * * * * * * * * * * * * //
+
+Foam::autoPtr<Foam::fa::option> Foam::fa::option::New
+(
+    const word& name,
+    const dictionary& coeffs,
+    const fvPatch& patch
+)
+{
+    const word modelType(coeffs.get<word>("type"));
+
+    Info<< indent
+        << "Selecting finite area options type " << modelType << endl;
+
+    const_cast<Time&>(patch.boundaryMesh().mesh().time()).libs().open
+    (
+        coeffs,
+        "libs",
+        dictionaryConstructorTablePtr_
+    );
+
+    auto cstrIter = dictionaryConstructorTablePtr_->cfind(modelType);
+
+    if (!cstrIter.found())
+    {
+        FatalErrorInFunction
+            << "Unknown faOption model type "
+            << modelType << nl << nl
+            << "Valid faOption types are:" << nl
+            << dictionaryConstructorTablePtr_->sortedToc()
+            << exit(FatalError);
+    }
+
+    return autoPtr<option>(cstrIter()(name, modelType, coeffs, patch));
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+bool Foam::fa::option::isActive()
+{
+    return active_;
+}
+
+
+Foam::label Foam::fa::option::applyToField(const word& fieldName) const
+{
+    return fieldNames_.find(fieldName);
+}
+
+
+void Foam::fa::option::checkApplied() const
+{
+    forAll(applied_, i)
+    {
+        if (!applied_[i])
+        {
+            WarningInFunction
+                << "Source " << name_ << " defined for field "
+                << fieldNames_[i] << " but never used" << endl;
+        }
+    }
+}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    faMatrix<scalar>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    faMatrix<vector>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    faMatrix<sphericalTensor>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    faMatrix<symmTensor>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    faMatrix<tensor>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    const areaScalarField& rho,
+    faMatrix<scalar>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    const areaScalarField& rho,
+    faMatrix<vector>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    const areaScalarField& rho,
+    faMatrix<sphericalTensor>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    const areaScalarField& rho,
+    faMatrix<symmTensor>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::addSup
+(
+    const areaScalarField& h,
+    const areaScalarField& rho,
+    faMatrix<tensor>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::constrain(faMatrix<scalar>& eqn, const label fieldi)
+{}
+
+
+void Foam::fa::option::constrain(faMatrix<vector>& eqn, const label fieldi)
+{}
+
+
+void Foam::fa::option::constrain
+(
+    faMatrix<sphericalTensor>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::constrain
+(
+    faMatrix<symmTensor>& eqn,
+    const label fieldi
+)
+{}
+
+
+void Foam::fa::option::constrain(faMatrix<tensor>& eqn, const label fieldi)
+{}
+
+
+void Foam::fa::option::correct(areaScalarField& field)
+{}
+
+
+void Foam::fa::option::correct(areaVectorField& field)
+{}
+
+
+void Foam::fa::option::correct(areaSphericalTensorField& field)
+{}
+
+
+void Foam::fa::option::correct(areaSymmTensorField& field)
+{}
+
+
+void Foam::fa::option::correct(areaTensorField& field)
+{}
+
+
+// ************************************************************************* //

src/faOptions/faOption/faOption.H

@@ -0,0 +1,441 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::fa::option
+
+Description
+    Base abstract class for handling finite area options (i.e. \c faOption).
+
+Usage
+    Minimal example by using \c constant/faOptions:
+    \verbatim
+    <userDefinedName1>
+    {
+        // Mandatory entries (unmodifiable)
+        type              <faOptionName>;
+
+        // Mandatory entries (runtime modifiable)
+        region            <regionName>;
+
+        // Optional entries (unmodifiable/runtime modifiable)
+        <faOption>Coeffs
+        {
+            // subdictionary entries
+        }
+
+        // Optional entries (runtime modifiable)
+        active            true;
+        log               true;
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property         | Description                   | Type  | Reqd | Dflt
+      type             | Name of operand faOption      | word  | yes  | -
+      region           | Name of operand region        | word  | yes  | -
+      \<faOption\>Coeffs | Dictionary containing settings of <!--
+                    --> the selected faOption settings | dictionary | no | -
+      active   | Flag to (de)activate faOption         | bool  | no   | true
+      log      | Flag to log faOption-related info     | bool  | no   | true
+    \endtable
+
+Note
+  - Source/sink options are to be added to the right-hand side of equations.
+
+SourceFiles
+    faOption.C
+    faOptionIO.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef faOption_H
+#define faOption_H
+
+#include "faMatrices.H"
+#include "areaFields.H"
+#include "dictionary.H"
+#include "Switch.H"
+#include "runTimeSelectionTables.H"
+#include "fvMesh.H"
+#include "volSurfaceMapping.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class option Declaration
+\*---------------------------------------------------------------------------*/
+
+class option
+{
+    // Private Member Functions
+
+        //- Construct region mesh and fields
+        void constructMeshObjects();
+
+
+protected:
+
+    // Protected Data
+
+        //- Source name
+        const word name_;
+
+        //- Model type
+        const word modelType_;
+
+        //- Reference to the mesh database
+        const fvMesh& mesh_;
+
+        //- Reference to the patch
+        const fvPatch& patch_;
+
+        //- Top level source dictionary
+        dictionary dict_;
+
+        //- Dictionary containing source coefficients
+        dictionary coeffs_;
+
+        //- Source active flag
+        Switch active_;
+
+        //- Field names to apply source to - populated by derived models
+        wordList fieldNames_;
+
+        //- Applied flag list - corresponds to each fieldNames_ entry
+        List<bool> applied_;
+
+         //- Region name
+        word regionName_;
+
+        //- Pointer to the region mesh database
+        autoPtr<faMesh> regionMeshPtr_;
+
+        //-Volume-to surface mapping
+        autoPtr<volSurfaceMapping> vsmPtr_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("option");
+
+
+     // Declare run-time constructor selection table
+
+        declareRunTimeSelectionTable
+        (
+            autoPtr,
+            option,
+            dictionary,
+            (
+                const word& name,
+                const word& modelType,
+                const dictionary& dict,
+                const fvPatch& patch
+            ),
+            (name, modelType, dict, patch)
+        );
+
+
+    // Constructors
+
+        //- Construct from components
+        option
+        (
+            const word& name,
+            const word& modelType,
+            const dictionary& dict,
+            const fvPatch& patch
+        );
+
+        //- Return clone
+        autoPtr<option> clone() const
+        {
+            NotImplemented;
+            return nullptr;
+        }
+
+        //- Return pointer to new faOption object created
+        //- on the freestore from an Istream
+        class iNew
+        {
+
+            //- Reference to the patch
+            const fvPatch& patch_;
+
+            //- Name
+            const word& name_;
+
+        public:
+
+            iNew
+            (
+                const fvPatch& patch,
+                const word& name
+            )
+            :
+                patch_(patch),
+                name_(name)
+            {}
+
+            autoPtr<option> operator()(Istream& is) const
+            {
+                const dictionary dict(is);
+
+                return autoPtr<option>
+                (
+                    option::New(name_, dict, patch_)
+                );
+            }
+        };
+
+
+    // Selectors
+
+        //- Return a reference to the selected faOption model
+        static autoPtr<option> New
+        (
+            const word& name,
+            const dictionary& dict,
+            const fvPatch& patch
+        );
+
+
+    //- Destructor
+    virtual ~option() = default;
+
+
+    // Member Functions
+
+        // Access
+
+            //- Return const access to the source name
+            inline const word& name() const;
+
+            //- Return const access to the mesh database
+            inline const fvMesh& mesh() const;
+
+            //- Return const access to fvPatch
+            inline const fvPatch& patch() const;
+
+            //- Return dictionary
+            inline const dictionary& coeffs() const;
+
+            //- Return const access to the source active flag
+            inline bool active() const;
+
+            //- Set the applied flag to true for field index fieldi
+            inline void setApplied(const label fieldi);
+
+            //- Return the region mesh database
+            inline const faMesh& regionMesh() const;
+
+             //- Return volSurfaceMapping
+            inline const volSurfaceMapping& vsm() const;
+
+            //- Region name
+            inline const word& regionName() const;
+
+
+        // Edit
+
+            //- Return access to the source active flag
+            inline Switch& active();
+
+
+        // Checks
+
+            //- Is the source active?
+            virtual bool isActive();
+
+            //- Return index of field name if found in fieldNames list
+            virtual label applyToField(const word& fieldName) const;
+
+            //- Check that the source has been applied
+            virtual void checkApplied() const;
+
+
+        // Evaluation
+
+            // Explicit and implicit sources
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    faMatrix<scalar>& eqn,
+                    const label fieldi
+                );
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    faMatrix<vector>& eqn,
+                    const label fieldi
+                );
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    faMatrix<symmTensor>& eqn,
+                    const label fieldi
+                );
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    faMatrix<sphericalTensor>& eqn,
+                    const label fieldi
+                );
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    faMatrix<tensor>& eqn,
+                    const label fieldi
+                );
+
+
+            // Explicit and implicit sources for compressible equations
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    const areaScalarField& rho,
+                    faMatrix<scalar>& eqn,
+                    const label fieldi
+                );
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    const areaScalarField& rho,
+                    faMatrix<vector>& eqn,
+                    const label fieldi
+                );
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    const areaScalarField& rho,
+                    faMatrix<symmTensor>& eqn,
+                    const label fieldi
+                );
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    const areaScalarField& rho,
+                    faMatrix<sphericalTensor>& eqn,
+                    const label fieldi
+                );
+
+                virtual void addSup
+                (
+                    const areaScalarField& h,
+                    const areaScalarField& rho,
+                    faMatrix<tensor>& eqn,
+                    const label fieldi
+                );
+
+
+            // Constraints
+
+                virtual void constrain
+                (
+                    faMatrix<scalar>& eqn,
+                    const label fieldi
+                );
+
+                virtual void constrain
+                (
+                    faMatrix<vector>& eqn,
+                    const label fieldi
+                );
+
+                virtual void constrain
+                (
+                    faMatrix<sphericalTensor>& eqn,
+                    const label fieldi
+                );
+
+                virtual void constrain
+                (
+                    faMatrix<symmTensor>& eqn,
+                    const label fieldi
+                );
+
+                virtual void constrain
+                (
+                    faMatrix<tensor>& eqn,
+                    const label fieldi
+                );
+
+
+            // Correction
+
+                virtual void correct(areaScalarField& field);
+                virtual void correct(areaVectorField& field);
+                virtual void correct(areaSphericalTensorField& field);
+                virtual void correct(areaSymmTensorField& field);
+                virtual void correct(areaTensorField& field);
+
+
+        // IO
+
+            //- Write the source header information
+            virtual void writeHeader(Ostream&) const;
+
+            //- Write the source footer information
+            virtual void writeFooter(Ostream&) const;
+
+            //- Write the source properties
+            virtual void writeData(Ostream&) const;
+
+            //- Read source dictionary
+            virtual bool read(const dictionary& dict);
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace fa
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#include "faOptionI.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/faOptions/faOption/faOptionI.H

@@ -0,0 +1,108 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+------------------------------------------------------------------------------
+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/>.
+
+\*---------------------------------------------------------------------------*/
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+inline const Foam::word& Foam::fa::option::name() const
+{
+    return name_;
+}
+
+
+inline const Foam::fvMesh& Foam::fa::option::mesh() const
+{
+    return mesh_;
+}
+
+
+inline const Foam::fvPatch& Foam::fa::option::patch() const
+{
+    return patch_;
+}
+
+
+inline const Foam::dictionary& Foam::fa::option::coeffs() const
+{
+    return coeffs_;
+}
+
+
+inline bool Foam::fa::option::active() const
+{
+    return active_;
+}
+
+
+inline void Foam::fa::option::setApplied(const label fieldi)
+{
+    applied_[fieldi] = true;
+}
+
+
+inline Foam::Switch& Foam::fa::option::active()
+{
+    return active_;
+}
+
+
+inline const Foam::word& Foam::fa::option::regionName() const
+{
+    return regionName_;
+}
+
+
+inline const Foam::faMesh& Foam::fa::option::regionMesh() const
+{
+    if (regionMeshPtr_.valid())
+    {
+        return regionMeshPtr_();
+    }
+    else
+    {
+        FatalErrorInFunction
+            << "Region mesh not available" << abort(FatalError);
+    }
+    return *(new faMesh(mesh_));
+}
+
+
+inline const Foam::volSurfaceMapping& Foam::fa::option::vsm() const
+{
+    if (vsmPtr_.valid())
+    {
+        return vsmPtr_();
+    }
+    else
+    {
+        FatalErrorInFunction
+            << "vsmPtr not available" << abort(FatalError);
+    }
+    return *(new volSurfaceMapping(regionMeshPtr_()));
+}
+
+
+// ************************************************************************* //

src/faOptions/faOption/faOptionIO.C

@@ -0,0 +1,64 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+------------------------------------------------------------------------------
+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 "faOption.H"
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::fa::option::writeHeader(Ostream& os) const
+{
+    os.beginBlock(name_);
+}
+
+
+void Foam::fa::option::writeFooter(Ostream& os) const
+{
+    os.endBlock();
+}
+
+
+void Foam::fa::option::writeData(Ostream& os) const
+{
+    os.writeEntry("type", type());
+    os.writeEntry("active", active_);
+
+    os << nl;
+    coeffs_.writeEntry(word(type() + "Coeffs"), os);
+}
+
+
+bool Foam::fa::option::read(const dictionary& dict)
+{
+    dict.readIfPresent("active", active_);
+
+    coeffs_ = dict.optionalSubDict(modelType_ + "Coeffs");
+
+    return true;
+}
+
+
+// ************************************************************************* //

src/faOptions/faOption/faOptionList.C

@@ -0,0 +1,178 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+------------------------------------------------------------------------------
+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 "faOptionList.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+    defineTypeNameAndDebug(optionList, 0);
+}
+}
+
+
+// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
+
+const Foam::dictionary& Foam::fa::optionList::optionsDict
+(
+    const dictionary& dict
+) const
+{
+    if (dict.found("options"))
+    {
+        return dict.subDict("options");
+    }
+    else
+    {
+        return dict;
+    }
+}
+
+
+bool Foam::fa::optionList::readOptions(const dictionary& dict)
+{
+    checkTimeIndex_ = mesh_.time().timeIndex() + 2;
+
+    bool allOk = true;
+    forAll(*this, i)
+    {
+        option& bs = this->operator[](i);
+        bool ok = bs.read(dict.subDict(bs.name()));
+        allOk = (allOk && ok);
+    }
+    return allOk;
+}
+
+
+void Foam::fa::optionList::checkApplied() const
+{
+    if (mesh_.time().timeIndex() == checkTimeIndex_)
+    {
+        forAll(*this, i)
+        {
+            const option& bs = this->operator[](i);
+            bs.checkApplied();
+        }
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::fa::optionList::optionList
+(
+    const fvPatch& p,
+    const dictionary& dict
+)
+:
+    PtrList<option>(),
+    mesh_(p.boundaryMesh().mesh()),
+    patch_(p),
+    checkTimeIndex_(mesh_.time().startTimeIndex() + 2)
+{
+    reset(optionsDict(dict));
+}
+
+
+Foam::fa::optionList::optionList(const fvPatch& p)
+:
+    PtrList<option>(),
+    mesh_(p.boundaryMesh().mesh()),
+    patch_(p),
+    checkTimeIndex_(mesh_.time().startTimeIndex() + 2)
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::fa::optionList::reset(const dictionary& dict)
+{
+    // Count number of active faOptions
+    label count = 0;
+    for (const entry& dEntry : dict)
+    {
+        if (dEntry.isDict())
+        {
+            ++count;
+        }
+    }
+
+    this->resize(count);
+
+    count = 0;
+    for (const entry& dEntry : dict)
+    {
+        if (dEntry.isDict())
+        {
+            const word& name = dEntry.keyword();
+            const dictionary& sourceDict = dEntry.dict();
+
+            this->set
+            (
+                count++,
+                option::New(name, sourceDict, patch_)
+            );
+        }
+    }
+}
+
+
+bool Foam::fa::optionList::read(const dictionary& dict)
+{
+    return readOptions(optionsDict(dict));
+}
+
+
+bool Foam::fa::optionList::writeData(Ostream& os) const
+{
+    // Write list contents
+    forAll(*this, i)
+    {
+        os  << nl;
+        this->operator[](i).writeHeader(os);
+        this->operator[](i).writeData(os);
+        this->operator[](i).writeFooter(os);
+    }
+
+    // Check state of IOstream
+    return os.good();
+}
+
+
+// * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //
+
+Foam::Ostream& Foam::operator<<(Ostream& os, const fa::optionList& options)
+{
+    options.writeData(os);
+    return os;
+}
+
+
+// ************************************************************************* //

src/faOptions/faOption/faOptionList.H

@@ -0,0 +1,250 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+------------------------------------------------------------------------------
+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::fa::optionList
+
+Description
+    List of finite volume options
+
+SourceFile
+    optionList.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef faOptionList_H
+#define faOptionList_H
+
+#include "faOption.H"
+#include "PtrList.H"
+#include "GeometricField.H"
+#include "geometricOneField.H"
+#include "faPatchField.H"
+#include "fvMesh.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// Forward declaration of friend functions and operators
+namespace fa
+{
+    class optionList;
+}
+
+Ostream& operator<<(Ostream& os, const fa::optionList& options);
+
+namespace fa
+{
+
+/*---------------------------------------------------------------------------*\
+                         Class optionList Declaration
+\*---------------------------------------------------------------------------*/
+
+class optionList
+:
+    public PtrList<option>
+{
+protected:
+
+    // Protected Data
+
+        //- Reference to the mesh database
+        const fvMesh& mesh_;
+
+        //- Reference to the patch
+        const fvPatch& patch_;
+
+        //- Time index to check that all defined sources have been applied
+        label checkTimeIndex_;
+
+
+    // Protected Member Functions
+
+        //- Return the "options" sub-dictionary if present otherwise return dict
+        const dictionary& optionsDict(const dictionary& dict) const;
+
+        //- Read options dictionary
+        bool readOptions(const dictionary& dict);
+
+        //- Check that all sources have been applied
+        void checkApplied() const;
+
+        //- Return source for equation with specified name and dimensions
+        template<class Type>
+        tmp<faMatrix<Type>> source
+        (
+            GeometricField<Type, faPatchField, areaMesh>& field,
+            const areaScalarField& h,
+            const word& fieldName,
+            const dimensionSet& ds
+        );
+
+        //- No copy construct
+        optionList(const optionList&) = delete;
+
+        //- No copy assignment
+        void operator=(const optionList&) = delete;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("optionList");
+
+
+    // Constructors
+
+        //- Construct null
+        optionList(const fvPatch& p);
+
+        //- Construct from mesh and dictionary
+        optionList(const fvPatch&, const dictionary& );
+
+
+    //- Destructor
+    virtual ~optionList()
+    {}
+
+
+    // Member Functions
+
+        //- Reset the source list
+        void reset(const dictionary& dict);
+
+
+        // Sources
+
+            //- Return source for equation
+            template<class Type>
+            tmp<faMatrix<Type>> operator()
+            (
+                const areaScalarField& h,
+                GeometricField<Type, faPatchField, areaMesh>& field
+            );
+
+            //- Return source for equation with specified name
+            template<class Type>
+            tmp<faMatrix<Type>> operator()
+            (
+                const areaScalarField& h,
+                GeometricField<Type, faPatchField, areaMesh>& field,
+                const word& fieldName
+            );
+
+            //- Return source for equation
+            template<class Type>
+            tmp<faMatrix<Type>> operator()
+            (
+                const areaScalarField& h,
+                const areaScalarField& rho,
+                GeometricField<Type, faPatchField, areaMesh>& field
+            );
+
+            //- Return source for equation with specified name
+            template<class Type>
+            tmp<faMatrix<Type>> operator()
+            (
+                const areaScalarField& h,
+                const areaScalarField& rho,
+                GeometricField<Type, faPatchField, areaMesh>& field,
+                const word& fieldName
+            );
+
+
+            //- Return source for equation with specified name and dimensios
+            template<class Type>
+            tmp<faMatrix<Type>> operator()
+            (
+                const areaScalarField& rho,
+                GeometricField<Type, faPatchField, areaMesh>& field,
+                const dimensionSet& ds
+            );
+
+
+            //- Return source for equation with second time derivative
+            template<class Type>
+            tmp<faMatrix<Type>> d2dt2
+            (
+                GeometricField<Type, faPatchField, areaMesh>& field
+            );
+
+            //- Return source for equation with second time derivative
+            template<class Type>
+            tmp<faMatrix<Type>> d2dt2
+            (
+                GeometricField<Type, faPatchField, areaMesh>& field,
+                const word& fieldName
+            );
+
+
+        // Constraints
+
+            //- Apply constraints to equation
+            template<class Type>
+            void constrain(faMatrix<Type>& eqn);
+
+
+        // Correction
+
+            //- Apply correction to field
+            template<class Type>
+            void correct(GeometricField<Type, faPatchField, areaMesh>& field);
+
+
+        // IO
+
+            //- Read dictionary
+            virtual bool read(const dictionary& dict);
+
+            //- Write data to Ostream
+            virtual bool writeData(Ostream& os) const;
+
+            //- Ostream operator
+            friend Ostream& operator<<
+            (
+                Ostream& os,
+                const optionList& options
+            );
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace fa
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+    #include "faOptionListTemplates.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/faOptions/faOption/faOptionListTemplates.C

@@ -0,0 +1,290 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+------------------------------------------------------------------------------
+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 "profiling.H"
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class Type>
+Foam::tmp<Foam::faMatrix<Type>> Foam::fa::optionList::source
+(
+    GeometricField<Type, faPatchField, areaMesh>& field,
+    const areaScalarField& h,
+    const word& fieldName,
+    const dimensionSet& ds
+)
+{
+    checkApplied();
+
+    tmp<faMatrix<Type>> tmtx(new faMatrix<Type>(field, ds));
+    faMatrix<Type>& mtx = tmtx.ref();
+
+    forAll(*this, i)
+    {
+        option& source = this->operator[](i);
+
+        label fieldi = source.applyToField(fieldName);
+
+        if (fieldi != -1)
+        {
+            addProfiling(faopt, "faOption()." + source.name());
+
+            source.setApplied(fieldi);
+
+            if (source.isActive())
+            {
+                if (debug)
+                {
+                    Info<< "Applying source " << source.name() << " to field "
+                        << fieldName << endl;
+                }
+
+                source.addSup(h, mtx, fieldi);
+            }
+        }
+    }
+
+    return tmtx;
+}
+
+
+template<class Type>
+Foam::tmp<Foam::faMatrix<Type>> Foam::fa::optionList::operator()
+(
+    const areaScalarField& h,
+    GeometricField<Type, faPatchField, areaMesh>& field
+)
+{
+    return this->operator()(h, field, field.name());
+}
+
+
+template<class Type>
+Foam::tmp<Foam::faMatrix<Type>> Foam::fa::optionList::operator()
+(
+    const areaScalarField& h,
+    GeometricField<Type, faPatchField, areaMesh>& field,
+    const word& fieldName
+)
+{
+    return source(field, h, fieldName, field.dimensions()/dimTime*dimArea);
+}
+
+
+template<class Type>
+Foam::tmp<Foam::faMatrix<Type>> Foam::fa::optionList::operator()
+(
+    const areaScalarField& h,
+    const areaScalarField& rho,
+    GeometricField<Type, faPatchField, areaMesh>& field
+)
+{
+    return this->operator()(h, rho, field, field.name());
+}
+
+
+template<class Type>
+Foam::tmp<Foam::faMatrix<Type>> Foam::fa::optionList::operator()
+(
+    const areaScalarField& h,
+    const areaScalarField& rho,
+    GeometricField<Type, faPatchField, areaMesh>& field,
+    const word& fieldName
+)
+{
+    checkApplied();
+
+    const dimensionSet ds
+    (
+        rho.dimensions()*field.dimensions()/dimTime*dimArea
+    );
+
+    tmp<faMatrix<Type>> tmtx(new faMatrix<Type>(field, ds));
+    faMatrix<Type>& mtx = tmtx.ref();
+
+    forAll(*this, i)
+    {
+        option& source = this->operator[](i);
+
+        label fieldi = source.applyToField(fieldName);
+
+        if (fieldi != -1)
+        {
+            addProfiling(faopt, "faOption()." + source.name());
+
+            source.setApplied(fieldi);
+
+            if (source.isActive())
+            {
+                if (debug)
+                {
+                    Info<< "Applying source " << source.name() << " to field "
+                        << fieldName << endl;
+                }
+
+                source.addSup(h, rho, mtx, fieldi);
+            }
+        }
+    }
+
+    return tmtx;
+}
+
+
+template<class Type>
+Foam::tmp<Foam::faMatrix<Type>> Foam::fa::optionList::operator()
+(
+    const areaScalarField& rho,
+    GeometricField<Type, faPatchField, areaMesh>& field,
+    const dimensionSet& ds
+)
+{
+    checkApplied();
+
+    const dimensionSet dsMat(ds*dimArea);
+
+    tmp<faMatrix<Type>> tmtx(new faMatrix<Type>(field, dsMat));
+    faMatrix<Type>& mtx = tmtx.ref();
+
+    forAll(*this, i)
+    {
+        option& source = this->operator[](i);
+
+        label fieldi = source.applyToField(field.name());
+
+        if (fieldi != -1)
+        {
+            addProfiling(faopt, "faOption()." + source.name());
+
+            source.setApplied(fieldi);
+
+            if (source.isActive())
+            {
+                if (debug)
+                {
+                    Info<< "Applying source " << source.name() << " to field "
+                        << field.name() << endl;
+                }
+
+                source.addSup(rho, mtx, fieldi);
+            }
+        }
+    }
+
+    return tmtx;
+}
+
+
+template<class Type>
+Foam::tmp<Foam::faMatrix<Type>> Foam::fa::optionList::d2dt2
+(
+    GeometricField<Type, faPatchField, areaMesh>& field
+)
+{
+    return this->d2dt2(field, field.name());
+}
+
+
+template<class Type>
+Foam::tmp<Foam::faMatrix<Type>> Foam::fa::optionList::d2dt2
+(
+    GeometricField<Type, faPatchField, areaMesh>& field,
+    const word& fieldName
+)
+{
+    return source(field, fieldName, field.dimensions()/sqr(dimTime)*dimArea);
+}
+
+
+template<class Type>
+void Foam::fa::optionList::constrain(faMatrix<Type>& eqn)
+{
+    checkApplied();
+
+    forAll(*this, i)
+    {
+        option& source = this->operator[](i);
+
+        label fieldi = source.applyToField(eqn.psi().name());
+
+        if (fieldi != -1)
+        {
+            addProfiling(faopt, "faOption::constrain." + eqn.psi().name());
+
+            source.setApplied(fieldi);
+
+            if (source.isActive())
+            {
+                if (debug)
+                {
+                    Info<< "Applying constraint " << source.name()
+                        << " to field " << eqn.psi().name() << endl;
+                }
+
+                source.constrain(eqn, fieldi);
+            }
+        }
+    }
+}
+
+
+template<class Type>
+void Foam::fa::optionList::correct
+(
+    GeometricField<Type, faPatchField, areaMesh>& field
+)
+{
+    const word& fieldName = field.name();
+
+    forAll(*this, i)
+    {
+        option& source = this->operator[](i);
+
+        label fieldi = source.applyToField(fieldName);
+
+        if (fieldi != -1)
+        {
+            addProfiling(faopt, "faOption::correct." + source.name());
+
+            source.setApplied(fieldi);
+
+            if (source.isActive())
+            {
+                if (debug)
+                {
+                    Info<< "Correcting source " << source.name()
+                        << " for field " << fieldName << endl;
+                }
+
+                source.correct(field);
+            }
+        }
+    }
+}
+
+
+// ************************************************************************* //

src/faOptions/faOption/faOptions.C

@@ -0,0 +1,144 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+------------------------------------------------------------------------------
+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 "faOptions.H"
+#include "faMesh.H"
+#include "Time.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace fa
+    {
+        defineTypeNameAndDebug(options, 0);
+    }
+}
+
+
+// * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
+
+Foam::IOobject Foam::fa::options::createIOobject
+(
+    const fvMesh& mesh
+) const
+{
+    IOobject io
+    (
+        typeName,
+        mesh.time().constant(),
+        mesh,
+        IOobject::MUST_READ,
+        IOobject::NO_WRITE
+    );
+
+    if (io.typeHeaderOk<IOdictionary>(true))
+    {
+        Info<< "Creating finite area options from "
+            << io.instance()/io.name() << nl
+            << endl;
+
+        io.readOpt() = IOobject::MUST_READ_IF_MODIFIED;
+        return io;
+    }
+    else
+    {
+        // Check if the faOptions file is in system
+        io.instance() = mesh.time().system();
+
+        if (io.typeHeaderOk<IOdictionary>(true))
+        {
+            Info<< "Creating finite area options from "
+                << io.instance()/io.name() << nl
+                << endl;
+
+            io.readOpt() = IOobject::MUST_READ_IF_MODIFIED;
+            return io;
+        }
+        else
+        {
+            io.readOpt() = IOobject::NO_READ;
+            return io;
+        }
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::fa::options::options
+(
+    const fvPatch& p
+)
+:
+    IOdictionary(createIOobject(p.boundaryMesh().mesh())),
+    optionList(p, *this)
+{}
+
+
+Foam::fa::options& Foam::fa::options::New(const fvPatch& p)
+{
+    const fvMesh& mesh = p.boundaryMesh().mesh();
+
+    if (mesh.thisDb().foundObject<options>(typeName))
+    {
+        return const_cast<options&>
+        (
+            mesh.lookupObject<options>(typeName)
+        );
+    }
+    else
+    {
+        if (debug)
+        {
+            InfoInFunction
+                << "Constructing " << typeName
+                << " for region " << mesh.name() << endl;
+        }
+
+        options* objectPtr = new options(p);
+        regIOobject::store(objectPtr);
+        return *objectPtr;
+    }
+}
+
+
+bool Foam::fa::options::read()
+{
+    if (IOdictionary::regIOobject::read())
+    {
+        optionList::read(*this);
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
+
+// ************************************************************************* //

src/faOptions/faOption/faOptions.H

@@ -0,0 +1,112 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+------------------------------------------------------------------------------
+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::fa::options
+
+Description
+    Finite-area options
+
+SourceFiles
+    faOptions.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef fa_options_H
+#define fa_options_H
+
+#include "faOptionList.H"
+#include "IOdictionary.H"
+#include "autoPtr.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+
+/*---------------------------------------------------------------------------*\
+                        Class options Declaration
+\*---------------------------------------------------------------------------*/
+
+class options
+:
+    public IOdictionary,
+    public optionList
+{
+    // Private Member Functions
+
+        //- Create IO object if dictionary is present
+        IOobject createIOobject(const fvMesh& mesh) const;
+
+        //- No copy construct
+        options(const options&) = delete;
+
+        //- No copy assignment
+        void operator=(const options&) = delete;
+
+
+public:
+
+    // Declare name of the class and its debug switch
+    ClassName("faOptions");
+
+
+    // Constructors
+
+        //- Construct from components with list of field names
+        options(const fvPatch& p);
+
+        //- Construct faOptions and register to database if not present
+        //- otherwise lookup and return
+        static options& New(const fvPatch& p);
+
+
+    //- Destructor
+    virtual ~options()
+    {}
+
+
+    // Member Functions
+
+        //- Inherit read from optionList
+        using optionList::read;
+
+        //- Read dictionary
+        virtual bool read();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace fa
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/faOptions/faOption/makeFaOption.H

@@ -0,0 +1,54 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+------------------------------------------------------------------------------
+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/>.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef makeFaOption_H
+#define makeFaOption_H
+
+#include "faOption.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#define makeFaOption(Option, Type)                                             \
+                                                                               \
+    defineTemplateTypeNameAndDebugWithName                                     \
+    (                                                                          \
+        Foam::fa::Option<Foam::Type>,                                          \
+        #Type#Option,                                                          \
+        0                                                                      \
+    );                                                                         \
+                                                                               \
+    Foam::fa::option::adddictionaryConstructorToTable                          \
+        <Foam::fa::Option<Foam::Type>>                                         \
+        add##Option##Type##dictionary##ConstructorTooptionTable_
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/faOptions/faceSetOption/faceSetOption.C

@@ -0,0 +1,246 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "faceSetOption.H"
+#include "areaFields.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    namespace fa
+    {
+        defineTypeNameAndDebug(faceSetOption, 0);
+    }
+}
+
+
+const Foam::Enum
+<
+    Foam::fa::faceSetOption::selectionModeType
+>
+Foam::fa::faceSetOption::selectionModeTypeNames_
+({
+    { selectionModeType::smAll, "all" },
+    { selectionModeType::smVolFaceZone, "volFaceZone" }
+});
+
+
+// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
+
+void Foam::fa::faceSetOption::setSelection(const dictionary& dict)
+{
+    switch (selectionMode_)
+    {
+        case smAll:
+        {
+            break;
+        }
+        case smVolFaceZone:
+        {
+            dict.readEntry("faceZone", faceSetName_);
+            break;
+        }
+        default:
+        {
+            FatalErrorInFunction
+                << "Unknown selectionMode "
+                << selectionModeTypeNames_[selectionMode_]
+                << ". Valid selectionMode types : "
+                << selectionModeTypeNames_
+                << exit(FatalError);
+        }
+    }
+}
+
+
+void Foam::fa::faceSetOption::setArea()
+{
+    // Set area information
+
+    scalar sumArea = 0.0;
+    for (const label facei : faces_)
+    {
+        sumArea += regionMesh().S()[facei];
+    }
+    reduce(sumArea, sumOp<scalar>());
+
+    const scalar AOld = A_;
+    A_ = sumArea;
+
+    // Convert both areas to representation using current writeprecision
+    word AOldName(Time::timeName(AOld, IOstream::defaultPrecision()));
+    word AName(Time::timeName(A_, IOstream::defaultPrecision()));
+
+    if (AName != AOldName)
+    {
+        Info<< indent
+            << "- selected " << returnReduce(faces_.size(), sumOp<label>())
+            << " face(s) with area " << A_ << endl;
+    }
+}
+
+
+void Foam::fa::faceSetOption::setFaceSet()
+{
+    switch (selectionMode_)
+    {
+        case smVolFaceZone:
+        {
+            Info<< indent
+                << "- selecting faces using volume-mesh faceZone "
+                << faceSetName_ << endl;
+
+            label zoneID = mesh_.faceZones().findZoneID(faceSetName_);
+            if (zoneID == -1)
+            {
+                FatalErrorInFunction
+                    << "Cannot find faceZone " << faceSetName_ << endl
+                    << "Valid faceZones are " << mesh_.faceZones().names()
+                    << exit(FatalError);
+            }
+
+            const faceZone& addr = mesh_.faceZones()[zoneID];
+
+            const bitSet isZoneFace(mesh_.nFaces(), addr);
+
+            // Do we loop over faMesh faces or over faceZone faces?
+            const labelUList& faceLabels = regionMesh().faceLabels();
+
+            label n = 0;
+            for (const label facei : faceLabels)
+            {
+                if (isZoneFace[facei])
+                {
+                    n++;
+                }
+            }
+            faces_.setSize(n);
+            n = 0;
+            for (const label facei : faceLabels)
+            {
+                if (isZoneFace[facei])
+                {
+                    faces_[n++] = facei;
+                }
+            }
+            break;
+        }
+
+        case smAll:
+        {
+            Info<< indent << "- selecting all faces" << endl;
+            faces_ = identity(regionMesh().nFaces());
+
+            break;
+        }
+        default:
+        {
+            FatalErrorInFunction
+                << "Unknown selectionMode "
+                << selectionModeTypeNames_[selectionMode_]
+                << ". Valid selectionMode types are "
+                << selectionModeTypeNames_
+                << exit(FatalError);
+        }
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::fa::faceSetOption::faceSetOption
+(
+    const word& name,
+    const word& modelType,
+    const dictionary& dict,
+    const fvPatch& patch
+)
+:
+    option(name, modelType, dict, patch),
+    timeStart_(-1.0),
+    duration_(0.0),
+    selectionMode_(selectionModeTypeNames_.get("selectionMode", coeffs_)),
+    faceSetName_("none"),
+    A_(0.0)
+{
+    if (isActive())
+    {
+        Info<< incrIndent;
+        read(dict);
+        setSelection(coeffs_);
+        setFaceSet();
+        setArea();
+        Info<< decrIndent;
+    }
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+bool Foam::fa::faceSetOption::isActive()
+{
+    if (option::isActive() && inTimeLimits(mesh_.time().value()))
+    {
+        // Update the face set if the mesh is changing
+        if (mesh_.changing())
+        {
+            if (mesh_.topoChanging())
+            {
+                setArea();
+                // Force printing of new set area
+                A_ = -GREAT;
+            }
+
+            // Report new area (if changed)
+            setArea();
+        }
+
+        return true;
+    }
+
+    return false;
+}
+
+
+bool Foam::fa::faceSetOption::read(const dictionary& dict)
+{
+    if (option::read(dict))
+    {
+        if (coeffs_.readIfPresent("timeStart", timeStart_))
+        {
+            coeffs_.readEntry("duration", duration_);
+        }
+
+        return true;
+    }
+
+    return false;
+}
+
+
+// ************************************************************************* //

src/faOptions/faceSetOption/faceSetOption.H

@@ -0,0 +1,241 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::fa::faceSetOption
+
+Description
+    Intermediate abstract class for handling
+    face-set options for the derived faOptions.
+
+Usage
+    Minimal example by using \c constant/faOptions:
+    \verbatim
+    <userDefinedName1>
+    {
+        // Mandatory/Optional (inherited) entries
+        ...
+
+        // Mandatory entries (unmodifiable)
+        selectionMode     all;
+
+        // Optional entries (runtime modifiable)
+        timeStart         1.0;
+
+        // Conditional mandatory entries (runtime modifiable)
+
+            // when timeStart entry is present
+            duration          1.4;
+
+            // when selectionMode=volFaceZone
+            faceZone          <faceZoneName>;
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property      | Description                        | Type  | Reqd | Dflt
+      selectionMode | Mode of face selection - see below | word  | yes  | -
+      timeStart     | Start time of faOption             | scalar | no  | -1
+      duration      | Duration of faOption execution <!--
+                          --> starting from timeStart    | scalar | cndtnl | 0
+      faceZone      | Name of operand faceZone           | word  | cndtnl | -
+    \endtable
+
+    Options for the \c selectionMode entry:
+    \verbatim
+      all       | Use all faces in the computational domain
+      faceZone  | Use a given faceZone
+    \endverbatim
+
+    The inherited entries are elaborated in:
+     - \link faOption.H \endlink
+
+Note
+  - Source/sink options are to be added to the right-hand side of equations.
+
+SourceFiles
+    faceSetOption.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef faceSetOption_H
+#define faceSetOption_H
+
+#include "faOption.H"
+#include "faceSet.H"
+#include "faMesh.H"
+#include "Time.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+
+/*---------------------------------------------------------------------------*\
+                         Class faceSetOption Declaration
+\*---------------------------------------------------------------------------*/
+
+class faceSetOption
+:
+    public option
+{
+public:
+
+    // Public Enumeration
+
+        //- Enumeration for selection mode types
+        enum selectionModeType
+        {
+            smAll,
+            smVolFaceZone
+        };
+
+        //- List of selection mode type names
+        static const Enum<selectionModeType> selectionModeTypeNames_;
+
+
+protected:
+
+    // Protected Data
+
+        //- Time start
+        scalar timeStart_;
+
+        //- Duration
+        scalar duration_;
+
+        //- Face selection mode
+        selectionModeType selectionMode_;
+
+        //- Name of zone for "faceZone" selectionMode
+        word faceSetName_;
+
+        //- Set of faces to apply source to
+        labelList faces_;
+
+        //- Sum of face area
+        scalar A_;
+
+
+    // Protected Functions
+
+        //- Set the face selection
+        void setSelection(const dictionary& dict);
+
+        //- Set the face set based on the user input selection mode
+        void setFaceSet();
+
+        //- Recalculate the area
+        void setArea();
+
+
+public:
+
+    //- Runtime type information
+    TypeName("faceSetOption");
+
+
+    // Constructors
+
+        //- Construct from components
+        faceSetOption
+        (
+            const word& name,
+            const word& modelType,
+            const dictionary& dict,
+            const fvPatch& patch
+        );
+
+
+    //- Destructor
+    virtual ~faceSetOption() = default;
+
+
+    // Member Functions
+
+        // Access
+
+            //- Return const access to the time start
+            inline scalar timeStart() const;
+
+            //- Return const access to the duration
+            inline scalar duration() const;
+
+            //- Return true if within time limits
+            inline bool inTimeLimits(const scalar time) const;
+
+            //- Return const access to the face selection mode
+            inline const selectionModeType& selectionMode() const;
+
+            //- Return const access to the name of face set for "faceZone"
+            //- selectionMode
+            inline const word& faceSetName() const;
+
+            //- Return const access to the total face area
+            inline scalar A() const;
+
+            //- Return const access to the face set
+            inline const labelList& faces() const;
+
+
+        // Edit
+
+            //- Return access to the time start
+            inline scalar& timeStart();
+
+            //- Return access to the duration
+            inline scalar& duration();
+
+
+        // Checks
+
+            //- Is the source active?
+            virtual bool isActive();
+
+
+        // IO
+
+            //- Read source dictionary
+            virtual bool read(const dictionary& dict);
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace fa
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#include "faceSetOptionI.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/faOptions/faceSetOption/faceSetOptionI.H

@@ -0,0 +1,93 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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/>.
+
+\*---------------------------------------------------------------------------*/
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+inline Foam::scalar Foam::fa::faceSetOption::timeStart() const
+{
+    return timeStart_;
+}
+
+
+inline Foam::scalar Foam::fa::faceSetOption::duration() const
+{
+    return duration_;
+}
+
+
+inline bool Foam::fa::faceSetOption::inTimeLimits(const scalar time) const
+{
+    return
+    (
+        (timeStart_ < 0)
+     ||
+        (
+            (mesh_.time().value() >= timeStart_)
+         && (mesh_.time().value() <= (timeStart_ + duration_))
+        )
+    );
+}
+
+
+inline const Foam::fa::faceSetOption::selectionModeType&
+Foam::fa::faceSetOption::selectionMode() const
+{
+    return selectionMode_;
+}
+
+
+inline const Foam::word& Foam::fa::faceSetOption::faceSetName() const
+{
+    return faceSetName_;
+}
+
+
+inline Foam::scalar Foam::fa::faceSetOption::A() const
+{
+    return A_;
+}
+
+
+inline const Foam::labelList& Foam::fa::faceSetOption::faces() const
+{
+    return faces_;
+}
+
+
+inline Foam::scalar& Foam::fa::faceSetOption::timeStart()
+{
+    return timeStart_;
+}
+
+
+inline Foam::scalar& Foam::fa::faceSetOption::duration()
+{
+    return duration_;
+}
+
+
+// ************************************************************************* //

src/faOptions/sources/derived/contactHeatFluxSource/contactHeatFluxSource.C

@@ -0,0 +1,204 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "contactHeatFluxSource.H"
+#include "faMatrices.H"
+#include "addToRunTimeSelectionTable.H"
+#include "volFields.H"
+#include "famSup.H"
+#include "zeroGradientFaPatchFields.H"
+
+// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+    defineTypeNameAndDebug(contactHeatFluxSource, 0);
+    addToRunTimeSelectionTable(option, contactHeatFluxSource, dictionary);
+}
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::fa::contactHeatFluxSource::contactHeatFluxSource
+(
+    const word& sourceName,
+    const word& modelType,
+    const dictionary& dict,
+    const fvPatch& patch
+)
+:
+    faceSetOption(sourceName, modelType, dict, patch),
+    temperatureCoupledBase(patch, dict),
+    TName_(dict.getOrDefault<word>("T", "T")),
+    TprimaryName_(dict.get<word>("Tprimary")),
+    Tp_(mesh().lookupObject<volScalarField>(TprimaryName_)),
+    Tw1_
+    (
+        IOobject
+        (
+            "Tw1_" + sourceName,
+            mesh().time().timeName(),
+            mesh(),
+            IOobject::READ_IF_PRESENT,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(dimTemperature, Zero),
+        zeroGradientFaPatchScalarField::typeName
+    ),
+    thicknessLayers_(Zero),
+    kappaLayers_(Zero),
+    contactRes_(0),
+    curTimeIndex_(-1)
+{
+    fieldNames_.setSize(1, TName_);
+
+    applied_.setSize(fieldNames_.size(), false);
+
+    read(dict);
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+Foam::tmp<Foam::areaScalarField> Foam::fa::contactHeatFluxSource::htc() const
+{
+    IOobject io
+    (
+        "thtc",
+        mesh().time().timeName(),
+        mesh(),
+        IOobject::NO_READ,
+        IOobject::NO_WRITE
+    );
+
+    tmp<areaScalarField> thtc
+    (
+        new areaScalarField
+        (
+            io,
+            regionMesh(),
+            dimensionedScalar(dimPower/dimArea/dimTemperature, Zero)
+        )
+    );
+
+    areaScalarField& htc = thtc.ref();
+
+    const volScalarField::Boundary& vfb = Tp_.boundaryField();
+
+    htc.primitiveFieldRef() =
+        temperatureCoupledBase::kappa
+        (
+            vsm().mapInternalToSurface<scalar>(vfb)()
+        )*patch().deltaCoeffs();
+
+    if (contactRes_ != 0)
+    {
+        tmp<areaScalarField> tcontact
+        (
+            new areaScalarField
+            (
+                io,
+                regionMesh(),
+                dimensionedScalar
+                (
+                    "contact",
+                    dimPower/dimArea/dimTemperature,
+                    contactRes_
+                )
+            )
+        );
+        areaScalarField& contact = tcontact.ref();
+        htc.primitiveFieldRef() += contact.primitiveField();
+    }
+
+    return thtc;
+}
+
+
+void Foam::fa::contactHeatFluxSource::addSup
+(
+    const areaScalarField& h,
+    const areaScalarField& rhoCph,
+    faMatrix<scalar>& eqn,
+    const label fieldi
+)
+{
+    if (isActive())
+    {
+        DebugInfo<< name() << ": applying source to " << eqn.psi().name()
+                 << endl;
+
+        if (curTimeIndex_ != mesh().time().timeIndex())
+        {
+            const volScalarField::Boundary& vfb = Tp_.boundaryField();
+
+            Tw1_.primitiveFieldRef() =
+                this->vsm().mapInternalToSurface<scalar>(vfb);
+
+            tmp<areaScalarField> htcw = htc();
+
+            eqn += -fam::Sp(htcw(), eqn.psi()) + htcw()*Tw1_;
+
+            curTimeIndex_ = mesh().time().timeIndex();
+        }
+    }
+}
+
+
+bool Foam::fa::contactHeatFluxSource::read(const dictionary& dict)
+{
+    if (option::read(dict))
+    {
+        coeffs_.readIfPresent("T", TName_);
+
+        if (dict.readIfPresent("thicknessLayers", thicknessLayers_))
+        {
+            dict.readEntry("kappaLayers", kappaLayers_);
+
+            if (thicknessLayers_.size() > 0)
+            {
+                // Calculate effective thermal resistance by harmonic averaging
+                forAll(thicknessLayers_, iLayer)
+                {
+                    contactRes_ += thicknessLayers_[iLayer]/kappaLayers_[iLayer];
+                }
+                contactRes_ = scalar(1)/contactRes_;
+            }
+        }
+
+        return true;
+    }
+
+    return false;
+}
+
+
+// ************************************************************************* //

src/faOptions/sources/derived/contactHeatFluxSource/contactHeatFluxSource.H

@@ -0,0 +1,196 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::fa::contactHeatFluxSource
+
+Group
+    grpFaOptionsSources
+
+Description
+    Applies contact heat flux between specified \c faMesh
+    and \c fvMesh within a specified region for compressible flows.
+
+Usage
+    Minimal example by using \c constant/faOptions:
+    \verbatim
+    contactHeatFluxSource1
+    {
+        // Mandatory entries (unmodifiable)
+        type                contactHeatFluxSource;
+        Tprimary            <TprimaryFieldName>;
+
+        // Optional entries (runtime modifiable)
+        T                   <Tname>;
+        thicknessLayers     (<layer1> <layer2> ... <layerN>);
+
+        // Conditional optional entries (runtime modifiable)
+
+            // when the entry "thicknessLayers" is present
+            kappaLayers     (<layer1> <layer2> ... <layerN>);
+
+        // Mandatory/Optional (inherited) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property  | Description                       | Type  | Reqd | Dflt
+      type      | Type name: contactHeatFluxSource  | word  | yes  | -
+      Tprimary  | Name of primary temperature field | word  | yes  | -
+      T         | Name of operand temperature field | word  | no   | T
+      thicknessLayers | List of thicknesses of layers | scalarList | no | -
+      kappaLayers | List of conductivities of layers | scalarList | cndtnl | -
+    \endtable
+
+    The inherited entries are elaborated in:
+     - \link faOption.H \endlink
+     - \link faceSetOption.H \endlink
+     - \link temperatureCoupledBase.H \endlink
+
+SourceFiles
+    contactHeatFluxSource.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef fa_contactHeatFluxSource_H
+#define fa_contactHeatFluxSource_H
+
+#include "faOption.H"
+#include "Function1.H"
+#include "areaFields.H"
+#include "faceSetOption.H"
+#include "temperatureCoupledBase.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+
+/*---------------------------------------------------------------------------*\
+                        Class contactHeatFluxSource Declaration
+\*---------------------------------------------------------------------------*/
+
+class contactHeatFluxSource
+:
+    public faceSetOption,
+    public temperatureCoupledBase
+{
+    // Private Data
+
+        //- Name of temperature field
+        word TName_;
+
+        //- Name of primary temperature field
+        word TprimaryName_;
+
+        //- Primary region temperature
+        const volScalarField& Tp_;
+
+        //- Temperature - wall [K]
+        areaScalarField Tw1_;
+
+        //- Thickness of layers
+        scalarList thicknessLayers_;
+
+        //- Conductivity of layers
+        scalarList kappaLayers_;
+
+        //- Total contact resistance
+        scalar contactRes_;
+
+        //- Current time index (used for updating)
+        label curTimeIndex_;
+
+
+    // Private Member Functions
+
+        //- Return htc from the primary region
+        tmp<areaScalarField> htc() const;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("contactHeatFluxSource");
+
+
+    // Constructors
+
+        //- Construct from explicit source name and mesh
+        contactHeatFluxSource
+        (
+            const word& sourceName,
+            const word& modelType,
+            const dictionary& dict,
+            const fvPatch& patch
+        );
+
+        //- No copy construct
+        contactHeatFluxSource(const contactHeatFluxSource&) = delete;
+
+        //- No copy assignment
+        void operator=(const contactHeatFluxSource&) = delete;
+
+
+    //- Destructor
+    virtual ~contactHeatFluxSource() = default;
+
+
+    // Member Functions
+
+        // Evaluation
+
+            //- Add explicit contribution to compressible momentum equation
+            virtual void addSup
+            (
+                const areaScalarField& h,
+                const areaScalarField& rho,
+                faMatrix<scalar>& eqn,
+                const label fieldi
+            );
+
+
+        // IO
+
+            //- Read source dictionary
+            virtual bool read(const dictionary& dict);
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace fa
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+
+#endif
+
+// ************************************************************************* //

src/faOptions/sources/derived/externalFileSource/externalFileSource.C

@@ -0,0 +1,130 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "externalFileSource.H"
+#include "faMatrices.H"
+#include "faCFD.H"
+#include "zeroGradientFaPatchFields.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+    defineTypeNameAndDebug(externalFileSource, 0);
+    addToRunTimeSelectionTable(option, externalFileSource, dictionary);
+}
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::fa::externalFileSource::externalFileSource
+(
+    const word& sourceName,
+    const word& modelType,
+    const dictionary& dict,
+    const fvPatch& p
+)
+:
+    faceSetOption(sourceName, modelType, dict, p),
+    fieldName_(dict.get<word>("fieldName")),
+    tableName_(dict.get<word>("tableName")),
+    pExt_
+    (
+        IOobject
+        (
+            "pExt",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar("pExt", dimPressure, Zero),
+        zeroGradientFaPatchScalarField::typeName
+    ),
+    value_
+    (
+        new PatchFunction1Types::MappedFile<scalar>
+        (
+            p.patch(),
+            "uniformValue",
+            dict,
+            tableName_,          // field table name
+            true                 // face values
+        )
+    ),
+    curTimeIndex_(-1)
+{
+    fieldNames_.setSize(1, fieldName_);
+
+    applied_.setSize(fieldNames_.size(), false);
+
+    read(dict);
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::fa::externalFileSource::addSup
+(
+    const areaScalarField& solidMass,
+    faMatrix<scalar>& eqn,
+    const label fieldi
+)
+{
+    const scalar t = mesh().time().value();
+
+    if (isActive() && t > timeStart() && t < (timeStart() + duration()))
+    {
+        DebugInfo<< name() << ": applying source to " << eqn.psi().name()<<endl;
+
+        if (curTimeIndex_ != mesh().time().timeIndex())
+        {
+            pExt_.field() = value_->value(t);
+            eqn += pExt_/solidMass;
+            curTimeIndex_ = mesh().time().timeIndex();
+        }
+    }
+}
+
+
+bool Foam::fa::externalFileSource::read(const dictionary& dict)
+{
+    if (option::read(dict))
+    {
+        return true;
+    }
+
+    return false;
+}
+
+
+// ************************************************************************* //

src/faOptions/sources/derived/externalFileSource/externalFileSource.H

@@ -0,0 +1,169 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::fa::externalFileSource
+
+Group
+    grpFaOptionsSources
+
+Description
+    Applies sources on a specified field within a specified region
+    by using an external table file for compressible flows.
+
+Usage
+    Minimal example by using \c constant/faOptions:
+    \verbatim
+    externalFileSource1
+    {
+        // Mandatory entries (unmodifiable)
+        type                externalFileSource;
+        fieldName           <fieldName>;
+        tableName           <tableFileName.dat>;
+
+        // Mandatory/Optional (inherited) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property  | Description                    | Type  | Reqd | Dflt
+      type      | Type name: externalFileSource  | word  | yes  | -
+      fieldName | Name of operand field          | word  | yes  | -
+      tableName | Name of operand table file     | word  | yes  | -
+    \endtable
+
+    The inherited entries are elaborated in:
+     - \link faOption.H \endlink
+     - \link faceSetOption.H \endlink
+
+See also
+  - Foam::PatchFunction1Types
+
+SourceFiles
+    externalFileSource.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef fa_externalFileSource_H
+#define fa_externalFileSource_H
+
+#include "faOption.H"
+#include "areaFields.H"
+#include "faceSetOption.H"
+#include "MappedFile.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+
+/*---------------------------------------------------------------------------*\
+                        Class externalFileSource Declaration
+\*---------------------------------------------------------------------------*/
+
+class externalFileSource
+:
+    public faceSetOption
+{
+    // Private Data
+
+        //- Name of the field to apply this source
+        word fieldName_;
+
+        //- Name of the table
+        word tableName_;
+
+        //- External pressure field
+        areaScalarField pExt_;
+
+        //- Mapped data from file
+        autoPtr<PatchFunction1Types::MappedFile<scalar>> value_;
+
+        //- Current time index (used for updating)
+        label curTimeIndex_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("externalFileSource");
+
+
+    // Constructors
+
+        //- Construct from explicit source name and mesh
+        externalFileSource
+        (
+            const word& sourceName,
+            const word& modelType,
+            const dictionary& dict,
+            const fvPatch& patch
+        );
+
+        //- No copy construct
+        externalFileSource(const externalFileSource&) = delete;
+
+        //- No copy assignment
+        void operator=(const externalFileSource&) = delete;
+
+
+    //- Destructor
+    virtual ~externalFileSource() = default;
+
+
+    // Member Functions
+
+        // Evaluation
+
+            //- Add explicit contribution to compressible momentum equation
+            virtual void addSup
+            (
+                const areaScalarField& rho,
+                faMatrix<scalar>& eqn,
+                const label fieldi
+            );
+
+
+        // IO
+
+            //- Read source dictionary
+            virtual bool read(const dictionary& dict);
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace fa
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/faOptions/sources/derived/externalHeatFluxSource/externalHeatFluxSource.C

@@ -0,0 +1,208 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "externalHeatFluxSource.H"
+#include "addToRunTimeSelectionTable.H"
+#include "physicoChemicalConstants.H"
+#include "zeroGradientFaPatchFields.H"
+#include "addToRunTimeSelectionTable.H"
+
+using Foam::constant::physicoChemical::sigma;
+
+// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+    defineTypeNameAndDebug(externalHeatFluxSource, 0);
+    addToRunTimeSelectionTable(option, externalHeatFluxSource, dictionary);
+}
+}
+
+
+const Foam::Enum
+<
+    Foam::fa::externalHeatFluxSource::operationMode
+>
+Foam::fa::externalHeatFluxSource::operationModeNames
+({
+    { operationMode::fixedPower, "power" },
+    { operationMode::fixedHeatFlux, "flux" },
+    { operationMode::fixedHeatTransferCoeff, "coefficient" },
+});
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::fa::externalHeatFluxSource::externalHeatFluxSource
+(
+    const word& sourceName,
+    const word& modelType,
+    const dictionary& dict,
+    const fvPatch& patch
+)
+:
+    faceSetOption(sourceName, modelType, dict, patch),
+    mode_(operationModeNames.get("mode", dict)),
+    TName_(dict.getOrDefault<word>("T", "T")),
+    Q_(0),
+    q_(0),
+    h_(0),
+    Ta_(),
+    emissivity_(dict.getOrDefault<scalar>("emissivity", 0))
+{
+    fieldNames_.setSize(1, TName_);
+
+    applied_.setSize(fieldNames_.size(), false);
+
+    read(dict);
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::fa::externalHeatFluxSource::addSup
+(
+    const areaScalarField& h,
+    const areaScalarField& rho,
+    faMatrix<scalar>& eqn,
+    const label fieldi
+)
+{
+    if (isActive())
+    {
+        DebugInfo<< name() << ": applying source to "
+            << eqn.psi().name() << endl;
+
+        IOobject io
+        (
+            "Q",
+            mesh_.time().timeName(),
+            mesh_,
+            IOobject::NO_READ,
+            IOobject::NO_WRITE,
+            false
+        );
+
+        auto tQ = new areaScalarField
+        (
+            io,
+            regionMesh(),
+            dimensionedScalar("q", dimPower/sqr(dimLength), 0),
+            zeroGradientFaPatchScalarField::typeName
+        );
+        areaScalarField& Q = *tQ;
+
+        switch (mode_)
+        {
+            case fixedPower:
+            {
+                Q.primitiveFieldRef() = Q_/regionMesh().S().field();
+                eqn += Q;
+
+                break;
+            }
+            case fixedHeatFlux:
+            {
+                Q.primitiveFieldRef() = q_;
+                eqn += Q;
+                break;
+            }
+            case fixedHeatTransferCoeff:
+            {
+                const dimensionedScalar Ta
+                (
+                    "Ta",
+                    dimTemperature,
+                    Ta_->value(mesh_.time().timeOutputValue())
+                );
+
+                areaScalarField hp
+                (
+                    io,
+                    regionMesh(),
+                    dimensionedScalar
+                    (
+                        "h",
+                        dimPower/sqr(dimLength)/dimTemperature,
+                        h_
+                    )
+                );
+
+                const areaScalarField hpTa(hp*Ta);
+
+                if (emissivity_ > 0)
+                {
+                    hp -= emissivity_*sigma.value()*pow3(eqn.psi());
+                }
+
+                eqn -= fam::SuSp(hp, eqn.psi()) - hpTa;
+
+            }
+        }
+    }
+}
+
+
+bool Foam::fa::externalHeatFluxSource::read(const dictionary& dict)
+{
+    if (option::read(dict))
+    {
+        dict.readIfPresent("T", TName_);
+        dict.readIfPresent("emissivity", emissivity_);
+
+        mode_ = operationModeNames.get("mode", dict);
+
+        switch (mode_)
+        {
+            case fixedPower:
+            {
+                dict.readEntry("Q", Q_);
+                break;
+            }
+            case fixedHeatFlux:
+            {
+                dict.readEntry("q", q_);
+                break;
+            }
+            case fixedHeatTransferCoeff:
+            {
+                dict.readEntry("h", h_);
+                Ta_ = Function1<scalar>::New("Ta", dict);
+                break;
+            }
+        }
+
+        return true;
+    }
+
+     return false;
+}
+
+
+// ************************************************************************* //

src/faOptions/sources/derived/externalHeatFluxSource/externalHeatFluxSource.H

@@ -0,0 +1,241 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::fa::externalHeatFluxSource
+
+Group
+    grpFaOptionsSources
+
+Description
+    Applies a heat flux condition for a specified \c faMesh region
+    to temperature on an external wall for compressible flows
+    in one of three modes:
+
+      - fixed power: supply \c Q
+      - fixed heat flux: supply \c q
+      - fixed heat transfer coefficient: supply \c h and \c Ta
+
+    where
+    \vartable
+        Q  | Power [W]
+        q  | Heat flux [W/m^2]
+        h  | Heat transfer coefficient [W/m^2/K]
+        Ta | Ambient temperature [K]
+    \endvartable
+
+    The ambient temperature \c Ta is specified
+    as a \c Foam::Function1 of time but uniform in space.
+
+Usage
+    Minimal example by using \c constant/faOptions:
+    \verbatim
+    externalHeatFluxSource1
+    {
+        // Mandatory entries (unmodifiable)
+        type            externalHeatFluxSource;
+
+        // Mandatory entries (runtime modifiable)
+        mode            <mode>;
+
+        // Optional entries (runtime modifiable)
+        T               <Tname>;
+        emissivity      0;
+
+        // Conditional mandatory entries (runtime modifiable)
+
+            // when mode=power
+            Q           1.0;
+
+            // when mode=flux
+            q           1.0;
+
+            // when mode=coefficient
+            h           1.0;
+            Ta          <Function1>;
+
+        // Mandatory/Optional (inherited) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property  | Description                          | Type  | Reqd | Dflt
+      type      | Type name: externalHeatFluxSource    | word  | yes  | -
+      mode      | Mode of heat flux condition          | word  | yes  | -
+      T         | Name of operand temperature field    | word  | no   | T
+      emissivity | Surface emissivity for radiative flux to ambient <!--
+                 -->                                   | scalar | no  | 0
+      Q         | Fixed heat power [W]                 | scalar | cndtnl | -
+      q         | Fixed heat flux [W/m2]               | scalar | cndtnl | -
+      h         | Heat transfer coefficient [W/m^2/K]  | scalar | cndtnl | -
+      Ta        | Ambient temperature [K]           | Function1 | cndtnl | -
+    \endtable
+
+    The inherited entries are elaborated in:
+     - \link faOption.H \endlink
+     - \link faceSetOption.H \endlink
+
+    Options for the \c mode entry:
+    \verbatim
+      power       | Use fixed power (supply Q)
+      flux        | Use fixed heat flux (supply q)
+      coefficient | Use fixes heat transfer coefficient (supply h and T)
+    \endverbatim
+
+See also
+  - Foam::Function1
+
+SourceFiles
+    externalHeatFluxSource.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef fa_externalHeatFluxSource_H
+#define fa_externalHeatFluxSource_H
+
+#include "faOption.H"
+#include "Function1.H"
+#include "areaFields.H"
+#include "faceSetOption.H"
+#include "faCFD.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+
+/*---------------------------------------------------------------------------*\
+                    Class externalHeatFluxSource Declaration
+\*---------------------------------------------------------------------------*/
+
+class externalHeatFluxSource
+:
+    public faceSetOption
+{
+public:
+
+    // Public Enumeration
+
+        //- Options for the heat transfer condition mode
+        enum operationMode
+        {
+            fixedPower,                 //!< Fixed heat power [W]
+            fixedHeatFlux,              //!< Fixed heat flux [W/m2]
+            fixedHeatTransferCoeff,     //!< Fixed heat transfer coefficient
+        };
+
+        //- Names for operationMode
+        static const Enum<operationMode> operationModeNames;
+
+
+private:
+
+    // Private Data
+
+        //- Operation mode
+        operationMode mode_;
+
+        //- Name of temperature field
+        word TName_;
+
+        //- Heat power [W]
+        scalar Q_;
+
+        //- Heat flux [W/m2]
+        scalar q_;
+
+        //- Heat transfer coefficient [W/m2K]
+        scalar h_;
+
+        //- Ambient temperature [K]
+        autoPtr<Function1<scalar>> Ta_;
+
+        //- Optional surface emissivity for radiative transfer to ambient
+        scalar emissivity_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("externalHeatFluxSource");
+
+
+    // Constructors
+
+         //- Construct from explicit source name and mesh
+        externalHeatFluxSource
+        (
+            const word& sourceName,
+            const word& modelType,
+            const dictionary& dict,
+            const fvPatch& patch
+        );
+
+        //- No copy construct
+        externalHeatFluxSource(const externalHeatFluxSource&) = delete;
+
+        //- No copy assignment
+        void operator=(const externalHeatFluxSource&) = delete;
+
+
+    //- Destructor
+    virtual ~externalHeatFluxSource() = default;
+
+
+    // Member Functions
+
+        // Evaluation
+
+            //- Add explicit contribution to compressible momentum equation
+            virtual void addSup
+            (
+                const areaScalarField& h,
+                const areaScalarField& rho,
+                faMatrix<scalar>& eqn,
+                const label fieldi
+            );
+
+
+        // IO
+
+            //- Read source dictionary
+            virtual bool read(const dictionary& dict);
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace fa
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/faOptions/sources/derived/jouleHeatingSource/jouleHeatingSource.C

@@ -0,0 +1,193 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "jouleHeatingSource.H"
+#include "faMatrices.H"
+#include "faCFD.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+    defineTypeNameAndDebug(jouleHeatingSource, 0);
+    addToRunTimeSelectionTable(option, jouleHeatingSource, dictionary);
+}
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::fa::jouleHeatingSource::jouleHeatingSource
+(
+    const word& sourceName,
+    const word& modelType,
+    const dictionary& dict,
+    const fvPatch& patch
+)
+:
+    faceSetOption(sourceName, modelType, dict, patch),
+    TName_(dict.getOrDefault<word>("T", "T")),
+    V_
+    (
+        IOobject
+        (
+            typeName + ":V_" + regionName_,
+            mesh().time().timeName(),
+            mesh(),
+            IOobject::MUST_READ,
+            IOobject::AUTO_WRITE
+        ),
+        regionMesh()
+    ),
+    scalarSigmaVsTPtr_(nullptr),
+    tensorSigmaVsTPtr_(nullptr),
+    curTimeIndex_(-1),
+    nIter_(1),
+    anisotropicElectricalConductivity_(false)
+{
+    fieldNames_.setSize(1, TName_);
+
+    applied_.setSize(fieldNames_.size(), false);
+
+    if (anisotropicElectricalConductivity_)
+    {
+        Info<< "    Using tensor electrical conductivity" << endl;
+
+        initialiseSigma(coeffs_, tensorSigmaVsTPtr_);
+    }
+    else
+    {
+        Info<< "    Using scalar electrical conductivity" << endl;
+
+        initialiseSigma(coeffs_, scalarSigmaVsTPtr_);
+    }
+
+    read(dict);
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void Foam::fa::jouleHeatingSource::addSup
+(
+    const areaScalarField& h,
+    const areaScalarField& rho,
+    faMatrix<scalar>& eqn,
+    const label fieldi
+)
+{
+    if (isActive())
+    {
+        DebugInfo<< name() << ": applying source to " << eqn.psi().name()
+                 << endl;
+
+        if (curTimeIndex_ != mesh().time().timeIndex())
+        {
+            for (label i = 0; i < nIter_; ++i)
+            {
+                if (anisotropicElectricalConductivity_)
+                {
+                    // Update sigma as a function of T if required
+                    const areaTensorField& sigma =
+                        updateSigma(tensorSigmaVsTPtr_);
+
+                    // Solve the electrical potential equation
+                    faScalarMatrix VEqn(fam::laplacian(h*sigma, V_));
+                    VEqn.relax();
+                    VEqn.solve();
+                }
+                else
+                {
+                    // Update sigma as a function of T if required
+                    const areaScalarField& sigma =
+                        updateSigma(scalarSigmaVsTPtr_);
+
+                    // Solve the electrical potential equation
+                    faScalarMatrix VEqn(fam::laplacian(h*sigma, V_));
+                    VEqn.relax();
+                    VEqn.solve();
+                }
+            }
+
+            curTimeIndex_ = mesh().time().timeIndex();
+        }
+
+        // Add the Joule heating contribution
+        areaVectorField gradV("gradV", fac::grad(V_));
+
+        if (anisotropicElectricalConductivity_)
+        {
+            const auto& sigma =
+                mesh_.lookupObject<areaTensorField>
+                (
+                    typeName + ":sigma_" + regionName_
+                );
+
+            eqn += (h*sigma & gradV) & gradV;
+        }
+        else
+        {
+            const auto& sigma =
+                mesh_.lookupObject<areaScalarField>
+                (
+                    typeName + ":sigma_" + regionName_
+                );
+
+            eqn += (h*sigma*gradV) & gradV;
+
+            if (mesh().time().outputTime() && debug)
+            {
+                areaScalarField qgradV("gradVSource", (gradV & gradV));
+                qgradV.write();
+            }
+        }
+    }
+}
+
+
+bool Foam::fa::jouleHeatingSource::read(const dictionary& dict)
+{
+    if (option::read(dict))
+    {
+        dict.readIfPresent("T", TName_);
+
+        dict.readIfPresent("nIter", nIter_);
+
+        anisotropicElectricalConductivity_ =
+            dict.get<bool>("anisotropicElectricalConductivity");
+
+        return true;
+    }
+
+    return false;
+}
+
+
+// ************************************************************************* //

src/faOptions/sources/derived/jouleHeatingSource/jouleHeatingSource.H

@@ -0,0 +1,265 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::fa::jouleHeatingSource
+
+Group
+    grpFaOptionsSources
+
+Description
+    Evolves an electrical potential equation
+
+    \f[
+        \grad \left( \sigma \grad V \right)
+    \f]
+
+    where \f$ V \f$ is electrical potential
+    and \f$\sigma\f$ is the electrical current.
+
+    To provide a Joule heating contribution according to:
+
+    Differential form of Joule heating - power per unit volume:
+
+    \f[
+        \frac{d(P)}{d(V)} = J \cdot E
+    \f]
+
+    where \f$ J \f$ is the current density and \f$ E \f$ the electric field.
+    If no magnetic field is present:
+
+    \f[
+        J = \sigma E
+    \f]
+
+    The electric field given by
+
+    \f[
+        E = \grad V
+    \f]
+
+    Therefore:
+
+    \f[
+        \frac{d(P)}{d(V)} = J \cdot E
+                          = (sigma E) \cdot E
+                          = (sigma \grad V) \cdot \grad V
+    \f]
+
+Usage
+    Minimal example by using \c constant/faOptions:
+    \verbatim
+    jouleHeatingSource1
+    {
+        // Mandatory entries (unmodifiable)
+        type                 jouleHeatingSource;
+
+        // Mandatory entries (runtime modifiable)
+        anisotropicElectricalConductivity true;
+
+        // Optional entries (runtime modifiable)
+        T                   <Tname>;
+        nIter               -1;
+
+        // Conditional mandatory entries (runtime modifiable)
+
+            // when the entry "sigma" is present
+            sigma           <Function1>;
+
+            // when when the entry "sigma" is not present
+            // read "sigma" from file
+
+        // Mandatory/Optional (inherited) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property  | Description                       | Type  | Reqd | Dflt
+      type      | Type name: jouleHeatingSource     | word  | yes  | -
+      anisotropicElectricalConductivity | Flag to indicate that <!--
+                --> if the electrical conductivity is anisotropic <!--
+                -->                                 | bool  | yes  | -
+      T         | Name of operand temperature field | word  | no   | T
+      sigma     | Electrical conductivity as a function of temperature <!--
+                -->                                 | table | no   | -
+      nIter     | Number of iterations for electrical potential equation <!--
+                --> solution                        | label | no   | -1
+    \endtable
+
+    The inherited entries are elaborated in:
+     - \link faOption.H \endlink
+     - \link faceSetOption.H \endlink
+
+Note
+  - \c anisotropicElectricalConductivity=true enables
+  anisotropic (tensorial) electrical conductivity.
+  - \c anisotropicElectricalConductivity=false enables
+  isotropic (scalar) electrical conductivity.
+  - The electrical conductivity can be specified using either:
+    - If the \c sigma entry is present the electrical conductivity is specified
+    as a function of temperature using a \c Function1 type.
+    - If not present the \c sigma field will be read from file.
+    - If the \c anisotropicElectricalConductivity flag is set to \c true,
+    \c sigma should be specified as a tensor quantity.
+
+See also
+  - Foam::Function1
+
+SourceFiles
+    jouleHeatingSource.C
+    jouleHeatingSourceTemplates.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef fa_jouleHeatingSource_H
+#define fa_jouleHeatingSource_H
+
+#include "faOption.H"
+#include "Function1.H"
+#include "areaFields.H"
+#include "faceSetOption.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace fa
+{
+
+/*---------------------------------------------------------------------------*\
+                        Class jouleHeatingSource Declaration
+\*---------------------------------------------------------------------------*/
+
+class jouleHeatingSource
+:
+    public faceSetOption
+{
+    // Private Data
+
+        //- Name of temperature field
+        word TName_;
+
+        //- Electrical potential field / [V]
+        areaScalarField V_;
+
+        //- Electrical conductivity as a scalar function of temperature
+        autoPtr<Function1<scalar>> scalarSigmaVsTPtr_;
+
+        //- Electrical conductivity as a tensor function of temperature
+        autoPtr<Function1<tensor>> tensorSigmaVsTPtr_;
+
+        //- Current time index (used for updating)
+        label curTimeIndex_;
+
+        //- Number of iterations for electrical potential equation solution
+        label nIter_;
+
+        //- Flag to indicate that the electrical conductivity is anisotropic
+        bool anisotropicElectricalConductivity_;
+
+
+    // Private Member Functions
+
+        //- Initialise the electrical conductivity field
+        template<class Type>
+        void initialiseSigma
+        (
+            const dictionary& dict,
+            autoPtr<Function1<Type>>& sigmaVsTPtr
+        );
+
+        //- Update the electrical conductivity field
+        template<class Type>
+        const GeometricField<Type, faPatchField, areaMesh>&
+        updateSigma(const autoPtr<Function1<Type>>& sigmaVsTPtr) const;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("jouleHeatingSource");
+
+
+    // Constructors
+
+        //- Construct from explicit source name and mesh
+        jouleHeatingSource
+        (
+            const word& sourceName,
+            const word& modelType,
+            const dictionary& dict,
+            const fvPatch& patch
+        );
+
+        //- No copy construct
+        jouleHeatingSource(const jouleHeatingSource&) = delete;
+
+        //- No copy assignment
+        void operator=(const jouleHeatingSource&) = delete;
+
+
+    //- Destructor
+    virtual ~jouleHeatingSource() = default;
+
+
+    // Member Functions
+
+        // Evaluation
+
+            //- Add explicit contribution to compressible momentum equation
+            virtual void addSup
+            (
+                const areaScalarField& h,
+                const areaScalarField& rho,
+                faMatrix<scalar>& eqn,
+                const label fieldi
+            );
+
+
+        // IO
+
+            //- Read source dictionary
+            virtual bool read(const dictionary& dict);
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace fa
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+    #include "jouleHeatingSourceTemplates.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/faOptions/sources/derived/jouleHeatingSource/jouleHeatingSourceTemplates.C

@@ -0,0 +1,140 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "emptyFaPatch.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+template<class Type>
+void Foam::fa::jouleHeatingSource::initialiseSigma
+(
+    const dictionary& dict,
+    autoPtr<Function1<Type>>& sigmaVsTPtr
+)
+{
+    typedef GeometricField<Type, faPatchField, areaMesh> AreaFieldType;
+
+    if (dict.found("sigma"))
+    {
+        // Sigma to be defined using a Function1 type
+        sigmaVsTPtr = Function1<Type>::New("sigma", dict);
+
+        auto tsigma = tmp<AreaFieldType>::New
+        (
+            IOobject
+            (
+                typeName + ":sigma_" + regionName_,
+                mesh_.time().timeName(),
+                mesh_,
+                IOobject::NO_READ,
+                IOobject::AUTO_WRITE
+            ),
+            regionMesh(),
+            dimensioned<Type>(sqr(dimCurrent)/dimPower/dimLength, Zero)
+        );
+
+        mesh_.objectRegistry::store(tsigma.ptr());
+
+        Info<< "    Conductivity 'sigma' read from dictionary as f(T)"
+            << nl << endl;
+    }
+    else
+    {
+        // Sigma to be defined by user input
+        auto tsigma = tmp<AreaFieldType>::New
+        (
+            IOobject
+            (
+                typeName + ":sigma_" + regionName_,
+                mesh().time().timeName(),
+                mesh(),
+                IOobject::MUST_READ,
+                IOobject::AUTO_WRITE
+            ),
+            regionMesh()
+        );
+
+        mesh().objectRegistry::store(tsigma.ptr());
+
+        Info<< "    Conductivity 'sigma' read from file" << nl << endl;
+    }
+}
+
+
+template<class Type>
+const Foam::GeometricField<Type, Foam::faPatchField, Foam::areaMesh>&
+Foam::fa::jouleHeatingSource::updateSigma
+(
+    const autoPtr<Function1<Type>>& sigmaVsTPtr
+) const
+{
+    typedef GeometricField<Type, faPatchField, areaMesh> AreaFieldType;
+
+    auto& sigma =
+        mesh().lookupObjectRef<AreaFieldType>
+        (
+            typeName + ":sigma_" + regionName_
+        );
+
+    if (!sigmaVsTPtr.valid())
+    {
+        // Electrical conductivity field, sigma, was specified by the user
+        return sigma;
+    }
+
+    const auto& T = mesh().lookupObject<areaScalarField>(TName_);
+
+    // Internal field
+    forAll(sigma, i)
+    {
+        sigma[i] = sigmaVsTPtr->value(T[i]);
+    }
+
+
+    // Boundary field
+    typename AreaFieldType::Boundary& bf = sigma.boundaryFieldRef();
+    forAll(bf, patchi)
+    {
+        faPatchField<Type>& pf = bf[patchi];
+        if (!isA<emptyFaPatch>(bf[patchi]))
+        {
+            const scalarField& Tbf = T.boundaryField()[patchi];
+            forAll(pf, facei)
+            {
+                pf[facei] = sigmaVsTPtr->value(Tbf[facei]);
+            }
+        }
+    }
+
+    // Update processor patches
+    sigma.correctBoundaryConditions();
+
+    return sigma;
+}
+
+
+// ************************************************************************* //

src/finiteArea/Make/files

@@ -48,7 +48,8 @@ $(derivedFaPatchFields)/fixedValueOutflow/fixedValueOutflowFaPatchFields.C
 $(derivedFaPatchFields)/inletOutlet/inletOutletFaPatchFields.C
 $(derivedFaPatchFields)/slip/slipFaPatchFields.C
 $(derivedFaPatchFields)/edgeNormalFixedValue/edgeNormalFixedValueFaPatchVectorField.C
-$(derivedFaPatchFields)/uniformFixedValue/uniformFixedValueFaPatchFields.C
+$(derivedFaPatchFields)/timeVaryingUniformFixedValue/timeVaryingUniformFixedValueFaPatchFields.C
+$(derivedFaPatchFields)/clampedPlate/clampedPlateFaPatchFields.C
 
 faePatchFields = fields/faePatchFields
 $(faePatchFields)/faePatchField/faePatchFields.C
@@ -81,6 +82,7 @@ $(schemes)/upwind/upwindEdgeInterpolationMake.C
 $(schemes)/linearUpwind/linearUpwindEdgeInterpolationMake.C
 $(schemes)/Gamma/GammaEdgeInterpolationMake.C
 $(schemes)/blended/blendedEdgeInterpolationMake.C
+$(schemes)/skewCorrected/skewCorrectedEdgeInterpolationMake.C
 
 finiteArea/fa/fa.C
 finiteArea/faSchemes/faSchemes.C

src/finiteArea/faMesh/faPatches/faPatch/faPatch.C

@@ -343,8 +343,8 @@ Foam::tmp<Foam::vectorField> Foam::faPatch::ngbPolyPatchPointNormals() const
 
     const labelListList& pntEdges = pointEdges();
 
-    tmp<vectorField> tpN(new vectorField(pntEdges.size(), Zero));
-    vectorField& pN = tpN.ref();
+    auto tpN = tmp<vectorField>::New(pntEdges.size(), Zero);
+    auto& pN = tpN.ref();
 
     const vectorField faceNormals(ngbPolyPatchFaceNormals());
 
@@ -406,8 +406,8 @@ Foam::tmp<Foam::vectorField> Foam::faPatch::edgeNormals() const
 
 Foam::tmp<Foam::vectorField> Foam::faPatch::edgeFaceCentres() const
 {
-    tmp<vectorField> tfc(new vectorField(size()));
-    vectorField& fc = tfc.ref();
+    auto tfc = tmp<vectorField>::New(size());
+    auto& fc = tfc.ref();
 
     // get reference to global face centres
     const vectorField& gfc =
@@ -427,13 +427,22 @@ Foam::tmp<Foam::vectorField> Foam::faPatch::edgeFaceCentres() const
 Foam::tmp<Foam::vectorField> Foam::faPatch::delta() const
 {
     return edgeNormals()*(edgeNormals() & (edgeCentres() - edgeFaceCentres()));
-    //return edgeCentres() - edgeFaceCentres();
 }
 
 
 void Foam::faPatch::makeDeltaCoeffs(scalarField& dc) const
 {
-    dc = 1.0/(edgeNormals() & delta());
+    dc = scalar(1)/(edgeNormals() & delta());
+}
+
+
+void Foam::faPatch::makeCorrectionVectors(vectorField& k) const
+{
+    vectorField unitDelta(delta()/mag(delta()));
+    vectorField edgeNormMag(edgeNormals()/mag(edgeNormals()));
+    scalarField dn(edgeNormals() & delta());
+
+    k = edgeNormMag - (scalar(1)/(unitDelta & edgeNormMag))*unitDelta;
 }
 
 
@@ -445,7 +454,7 @@ const Foam::scalarField& Foam::faPatch::deltaCoeffs() const
 
 void Foam::faPatch::makeWeights(scalarField& w) const
 {
-    w = 1.0;
+    w = scalar(1);
 }
 
 

src/finiteArea/faMesh/faPatches/faPatch/faPatch.H

@@ -6,6 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2016-2017 Wikki Ltd
+    Copyright (C) 2020 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -35,7 +36,9 @@ Author
 
 SourceFiles
     faPatch.C
-    newFaPatch.C
+    faPatchNew.C
+    faPatchTemplates.C
+    faPatchFaMeshTemplates.C
 
 \*---------------------------------------------------------------------------*/
 
@@ -68,9 +71,7 @@ class faPatch
     public labelList,
     public patchIdentifier
 {
-private:
-
-    // Private data
+    // Private Data
 
         //- Neighbour polyPatch index
         const label ngbPolyPatchIndex_;
@@ -106,6 +107,8 @@ private:
 
 protected:
 
+    // Protected Member Functions
+
         //- The faPatch geometry initialisation is called by faBoundaryMesh
         friend class faBoundaryMesh;
 
@@ -143,7 +146,6 @@ public:
 
     typedef faBoundaryMesh BoundaryMesh;
 
-
     //- Runtime type information
     TypeName("patch");
 
@@ -189,7 +191,7 @@ public:
         faPatch(const faPatch&, const faBoundaryMesh&);
 
         //- Construct and return a clone, resetting the edge list
-        //  and boundary mesh
+        //- and boundary mesh
         virtual autoPtr<faPatch> clone
         (
             const faBoundaryMesh& bm,
@@ -207,7 +209,7 @@ public:
     // Selectors
 
         //- Return a pointer to a new patch created
-        // on freestore from dictionary
+        //- on freestore from dictionary
         static autoPtr<faPatch> New
         (
             const word& name,
@@ -320,6 +322,8 @@ public:
             //- Make patch edge - neighbour face distances
             virtual void makeDeltaCoeffs(scalarField&) const;
 
+            void makeCorrectionVectors(vectorField&) const;
+
             //- Return patch edge - neighbour face distances
             const scalarField& deltaCoeffs() const;
 
@@ -330,7 +334,7 @@ public:
             void resetEdges(const labelList&);
 
 
-        // Evaluation functions
+        // Evaluation
 
             //- Return given internal field next to patch as patch field
             template<class Type>
@@ -344,7 +348,7 @@ public:
             ) const;
 
             //- Lookup and return the patchField of the named field from the
-            //  local objectRegistry.
+            //- local objectRegistry.
             //  N.B.  The dummy pointer arguments are used if this function is
             //  instantiated within a templated function to avoid a bug in gcc.
             //  See inletOutletFvPatchField.C and outletInletFvPatchField.C

src/finiteArea/fields/faPatchFields/derived/clampedPlate/clampedPlateFaPatchField.C

@@ -0,0 +1,179 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "clampedPlateFaPatchField.H"
+#include "areaFields.H"
+#include "uniformDimensionedFields.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class Type>
+clampedPlateFaPatchField<Type>::clampedPlateFaPatchField
+(
+    const faPatch& p,
+    const DimensionedField<Type, areaMesh>& iF
+)
+:
+    faPatchField<Type>(p, iF)
+{}
+
+
+template<class Type>
+clampedPlateFaPatchField<Type>::clampedPlateFaPatchField
+(
+    const faPatch& p,
+    const DimensionedField<Type, areaMesh>& iF,
+    const dictionary& dict
+)
+:
+    faPatchField<Type>(p, iF)
+{
+    faPatchField<Type>::operator=(this->patchInternalField());
+}
+
+
+template<class Type>
+clampedPlateFaPatchField<Type>::clampedPlateFaPatchField
+(
+    const clampedPlateFaPatchField<Type>& ptf,
+    const faPatch& p,
+    const DimensionedField<Type, areaMesh>& iF,
+    const faPatchFieldMapper& mapper
+)
+:
+    faPatchField<Type>(ptf, p, iF, mapper)
+{}
+
+
+template<class Type>
+clampedPlateFaPatchField<Type>::clampedPlateFaPatchField
+(
+    const clampedPlateFaPatchField<Type>& ptf
+)
+:
+    faPatchField<Type>(ptf)
+{}
+
+
+template<class Type>
+clampedPlateFaPatchField<Type>::clampedPlateFaPatchField
+(
+    const clampedPlateFaPatchField<Type>& ptf,
+    const DimensionedField<Type, areaMesh>& iF
+)
+:
+    faPatchField<Type>(ptf, iF)
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class Type>
+void clampedPlateFaPatchField<Type>::evaluate(const Pstream::commsTypes)
+{
+    notImplemented(type() + "::evaluate(const Pstream::commsType)");
+}
+
+
+template<>
+void clampedPlateFaPatchField<scalar>::evaluate(const Pstream::commsTypes)
+{
+    if (!this->updated())
+    {
+        this->updateCoeffs();
+    }
+
+    Field<scalar>::operator=(pTraits<scalar>::zero);
+
+    const labelUList& edgeFaces = this->patch().edgeFaces();
+    forAll(edgeFaces, edgeID)
+    {
+        label faceID = edgeFaces[edgeID];
+        const_cast<Field<scalar>&>(this->primitiveField())[faceID] =
+            pTraits<scalar>::zero;
+    }
+
+    faPatchField<scalar>::evaluate();
+}
+
+
+template<class Type>
+tmp<Field<Type> > clampedPlateFaPatchField<Type>::valueInternalCoeffs
+(
+    const tmp<scalarField>&
+) const
+{
+    return tmp<Field<Type>>
+        (new Field<Type>(this->size(), pTraits<Type>::zero));
+}
+
+
+template<class Type>
+tmp<Field<Type> > clampedPlateFaPatchField<Type>::valueBoundaryCoeffs
+(
+    const tmp<scalarField>&
+) const
+{
+    return *this;
+}
+
+
+template<class Type>
+tmp<Field<Type> >
+clampedPlateFaPatchField<Type>::gradientInternalCoeffs() const
+{
+    return -Type(pTraits<Type>::one)*this->patch().deltaCoeffs();
+}
+
+
+template<class Type>
+tmp<Field<Type> >
+clampedPlateFaPatchField<Type>::gradientBoundaryCoeffs() const
+{
+    return this->patch().deltaCoeffs()*(*this);
+}
+
+
+template<class Type>
+void clampedPlateFaPatchField<Type>::write(Ostream& os) const
+{
+    faPatchField<Type>::write(os);
+    this->writeEntry("value", os);
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// ************************************************************************* //

src/finiteArea/fields/faPatchFields/derived/clampedPlate/clampedPlateFaPatchField.H

@@ -0,0 +1,214 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::clampedPlateFaPatchField
+
+Description
+    This BC provides a clamped BC. It sets zero fixe value and zeroGradient.
+
+Usage
+    Example of the boundary condition specification:
+    \verbatim
+    <patchName>
+    {
+        // Mandatory entries (unmodifiable)
+        type                clampedPlate;
+
+        // Mandatory/Optional (inherited) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property | Description               | Type  | Reqd | Dflt
+      type     | Type name: clampedPlate   | word  | yes  | -
+    \endtable
+
+    The inherited entries are elaborated in:
+      - \link faPatchFields.H \endlink
+
+SourceFiles
+    clampedPlateFaPatchField.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef clampedPlateFaPatchField_H
+#define clampedPlateFaPatchField_H
+
+#include "faPatchField.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                      Class clampedPlateFaPatch Declaration
+\*---------------------------------------------------------------------------*/
+
+template<class Type>
+class clampedPlateFaPatchField
+:
+    public faPatchField<Type>
+{
+public:
+
+    //- Runtime type information
+    TypeName("clampedPlate");
+
+
+    // Constructors
+
+        //- Construct from patch and internal field
+        clampedPlateFaPatchField
+        (
+            const faPatch&,
+            const DimensionedField<Type, areaMesh>&
+        );
+
+        //- Construct from patch, internal field and dictionary
+        clampedPlateFaPatchField
+        (
+            const faPatch&,
+            const DimensionedField<Type, areaMesh>&,
+            const dictionary&
+        );
+
+        //- Construct by mapping the given clampedPlateFaPatchField<Type>
+        //- onto a new patch
+        clampedPlateFaPatchField
+        (
+            const clampedPlateFaPatchField<Type>&,
+            const faPatch&,
+            const DimensionedField<Type, areaMesh>&,
+            const faPatchFieldMapper&
+        );
+
+        //- Construct as copy
+        clampedPlateFaPatchField
+        (
+            const clampedPlateFaPatchField<Type>&
+        );
+
+        //- Construct and return a clone
+        virtual tmp<faPatchField<Type>> clone() const
+        {
+            return tmp<faPatchField<Type>>
+            (
+                new clampedPlateFaPatchField<Type>(*this)
+            );
+        }
+
+        //- Construct as copy setting internal field reference
+        clampedPlateFaPatchField
+        (
+            const clampedPlateFaPatchField<Type>&,
+            const DimensionedField<Type, areaMesh>&
+        );
+
+        //- Construct and return a clone setting internal field reference
+        virtual tmp<faPatchField<Type> > clone
+        (
+            const DimensionedField<Type, areaMesh>& iF
+        ) const
+        {
+            return tmp<faPatchField<Type> >
+            (
+                new clampedPlateFaPatchField<Type>(*this, iF)
+            );
+        }
+
+
+     //- Destructor
+    virtual ~clampedPlateFaPatchField()
+    {}
+
+
+    // Member Functions
+
+        // Evaluation
+
+            //- Return gradient at boundary
+            virtual tmp<Field<Type>> snGrad() const
+            {
+                return tmp<Field<Type>>
+                (
+                    new Field<Type>(this->size(), Zero)
+                );
+            }
+
+            //- Evaluate the patch field
+            virtual void evaluate
+            (
+                const Pstream::commsTypes commsType=Pstream::commsTypes::blocking
+            );
+
+            //- Return the matrix diagonal coefficients corresponding to the
+            //- evaluation of the value of this patchField with given weights
+            virtual tmp<Field<Type> > valueInternalCoeffs
+            (
+                const tmp<scalarField>&
+            ) const;
+
+            //- Return the matrix source coefficients corresponding to the
+            //- evaluation of the value of this patchField with given weights
+            virtual tmp<Field<Type> > valueBoundaryCoeffs
+            (
+                const tmp<scalarField>&
+            ) const;
+
+            //- Return the matrix diagonal coefficients corresponding to the
+            //- evaluation of the gradient of this patchField
+            virtual tmp<Field<Type> > gradientInternalCoeffs() const;
+
+            //- Return the matrix source coefficients corresponding to the
+            //- evaluation of the gradient of this patchField
+            virtual tmp<Field<Type> > gradientBoundaryCoeffs() const;
+
+
+        // IO
+
+            //- Write
+            virtual void write(Ostream&) const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+#   include "clampedPlateFaPatchField.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/finiteArea/fields/faPatchFields/derived/clampedPlate/clampedPlateFaPatchFields.C

@@ -21,11 +21,11 @@ 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/>.
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>
 
 \*---------------------------------------------------------------------------*/
 
-#include "uniformFixedValueFaPatchFields.H"
+#include "clampedPlateFaPatchFields.H"
 #include "addToRunTimeSelectionTable.H"
 #include "areaFields.H"
 
@@ -36,7 +36,7 @@ namespace Foam
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
-makeFaPatchFields(uniformFixedValue);
+makeFaPatchFields(clampedPlate);
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 

src/finiteArea/fields/faPatchFields/derived/clampedPlate/clampedPlateFaPatchFields.H

@@ -21,14 +21,14 @@ 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/>.
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef uniformFixedValueFaPatchFields_H
-#define uniformFixedValueFaPatchFields_H
+#ifndef clampedPlateFaPatchFields_H
+#define clampedPlateFaPatchFields_H
 
-#include "uniformFixedValueFaPatchField.H"
+#include "clampedPlateFaPatchField.H"
 #include "fieldTypes.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -38,7 +38,7 @@ namespace Foam
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-makeFaPatchTypeFieldTypedefs(uniformFixedValue)
+makeFaPatchTypeFieldTypedefs(clampedPlate)
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 

src/finiteArea/fields/faPatchFields/derived/clampedPlate/clampedPlateFaPatchFieldsFwd.H

@@ -0,0 +1,52 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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/>
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef clampedPlateFaPatchFieldsFwd_H
+#define clampedPlateFaPatchFieldsFwd_H
+
+#include "fieldTypes.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+template<class Type> class clampedPlateFaPatchField;
+
+makeFaPatchTypeFieldTypedefs(clampedPlate)
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/finiteArea/fields/faPatchFields/derived/timeVaryingUniformFixedValue/timeVaryingUniformFixedValueFaPatchField.C

@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2020 OpenCFD Ltd.
+    Copyright (C) 2016-2017 Wikki Ltd
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -25,24 +25,27 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-#include "uniformFixedValueFaPatchField.H"
+#include "timeVaryingUniformFixedValueFaPatchField.H"
+#include "Time.H"
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 template<class Type>
-Foam::uniformFixedValueFaPatchField<Type>::uniformFixedValueFaPatchField
+Foam::timeVaryingUniformFixedValueFaPatchField<Type>::
+timeVaryingUniformFixedValueFaPatchField
 (
     const faPatch& p,
     const DimensionedField<Type, areaMesh>& iF
 )
 :
     fixedValueFaPatchField<Type>(p, iF),
-    uniformValue_(nullptr)
+    timeSeries_()
 {}
 
 
 template<class Type>
-Foam::uniformFixedValueFaPatchField<Type>::uniformFixedValueFaPatchField
+Foam::timeVaryingUniformFixedValueFaPatchField<Type>::
+timeVaryingUniformFixedValueFaPatchField
 (
     const faPatch& p,
     const DimensionedField<Type, areaMesh>& iF,
@@ -50,83 +53,85 @@ Foam::uniformFixedValueFaPatchField<Type>::uniformFixedValueFaPatchField
 )
 :
     fixedValueFaPatchField<Type>(p, iF),
-    uniformValue_(Function1<Type>::New("uniformValue", dict))
+    timeSeries_(dict)
 {
    if (dict.found("value"))
    {
-       faPatchField<Type>::operator==
-       (
-           Field<Type>("value", dict, p.size())
-       );
+       faPatchField<Type>::operator==(Field<Type>("value", dict, p.size()));
    }
    else
    {
-       this->evaluate();
+       updateCoeffs();
    }
 }
 
 
 template<class Type>
-Foam::uniformFixedValueFaPatchField<Type>::uniformFixedValueFaPatchField
+Foam::timeVaryingUniformFixedValueFaPatchField<Type>::
+timeVaryingUniformFixedValueFaPatchField
 (
-    const uniformFixedValueFaPatchField<Type>& ptf,
+    const timeVaryingUniformFixedValueFaPatchField<Type>& ptf,
     const faPatch& p,
     const DimensionedField<Type, areaMesh>& iF,
     const faPatchFieldMapper& mapper
 )
 :
     fixedValueFaPatchField<Type>(ptf, p, iF, mapper),
-    uniformValue_(ptf.uniformValue_.clone())
+    timeSeries_(ptf.timeSeries_)
 {}
 
 
 template<class Type>
-Foam::uniformFixedValueFaPatchField<Type>::uniformFixedValueFaPatchField
+Foam::timeVaryingUniformFixedValueFaPatchField<Type>::
+timeVaryingUniformFixedValueFaPatchField
 (
-    const uniformFixedValueFaPatchField<Type>& ptf
+    const timeVaryingUniformFixedValueFaPatchField<Type>& ptf
 )
 :
     fixedValueFaPatchField<Type>(ptf),
-    uniformValue_(ptf.uniformValue_.clone())
+    timeSeries_(ptf.timeSeries_)
 {}
 
 
 template<class Type>
-Foam::uniformFixedValueFaPatchField<Type>::uniformFixedValueFaPatchField
+Foam::timeVaryingUniformFixedValueFaPatchField<Type>::
+timeVaryingUniformFixedValueFaPatchField
 (
-    const uniformFixedValueFaPatchField<Type>& ptf,
+    const timeVaryingUniformFixedValueFaPatchField<Type>& ptf,
     const DimensionedField<Type, areaMesh>& iF
 )
 :
     fixedValueFaPatchField<Type>(ptf, iF),
-    uniformValue_(ptf.uniformValue_.clone())
+    timeSeries_(ptf.timeSeries_)
 {}
 
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
 template<class Type>
-void Foam::uniformFixedValueFaPatchField<Type>::updateCoeffs()
+void Foam::timeVaryingUniformFixedValueFaPatchField<Type>::updateCoeffs()
 {
     if (this->updated())
     {
         return;
     }
 
-    const scalar t = this->db().time().timeOutputValue();
-    faPatchField<Type>::operator==(uniformValue_->value(t));
+    faPatchField<Type>::operator==
+    (
+        timeSeries_(this->db().time().timeOutputValue())
+    );
     fixedValueFaPatchField<Type>::updateCoeffs();
 }
 
 
 template<class Type>
-void Foam::uniformFixedValueFaPatchField<Type>::write
+void Foam::timeVaryingUniformFixedValueFaPatchField<Type>::write
 (
     Ostream& os
 ) const
 {
     faPatchField<Type>::write(os);
-    uniformValue_->writeData(os);
+    timeSeries_.write(os);
     this->writeEntry("value", os);
 }
 

src/finiteArea/fields/faPatchFields/derived/timeVaryingUniformFixedValue/timeVaryingUniformFixedValueFaPatchField.H

@@ -5,6 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
+    Copyright (C) 2016-2017 Wikki Ltd
     Copyright (C) 2019-2020 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
@@ -24,42 +25,59 @@ License
     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
 Class
-    Foam::uniformFixedValueFaPatchField
+    Foam::timeVaryingUniformFixedValueFaPatchField
 
 Description
-    This finiteArea boundary condition
-    provides a uniform fixed value condition, which can also be time-varying.
+    A time-varying form of a uniform fixed value finite area
+    boundary condition.
 
 Usage
-    \table
-        Property     | Description                  | Required | Default
-        uniformValue | uniform value                | yes |
-    \endtable
-
     Example of the boundary condition specification:
     \verbatim
     <patchName>
     {
-        type            uniformFixedValue;
-        uniformValue    constant 0.2;
+        // Mandatory entries (unmodifiable)
+        type                timeVaryingUniformFixedValue;
+        fileName            "<case>/time-series";
+        outOfBounds         clamp;           // (error|warn|clamp|repeat)
+
+        // Mandatory/Optional (inherited) entries
+        ...
     }
     \endverbatim
 
+    where the entries mean:
+    \table
+      Property | Description                             | Type  | Reqd | Dflt
+      type     | Type name: timeVaryingUniformFixedValue | word  | yes  | -
+      fileName | Name of operand file                    | word  | yes  | -
+    \endtable
+
+    The inherited entries are elaborated in:
+      - \link faPatchFields.H \endlink
+
+Author
+    Zeljko Tukovic, FMENA
+    Hrvoje Jasak, Wikki Ltd.
+
+Note
+    This class is derived directly from a fixedValue patch rather than from
+    a uniformFixedValue patch.
+
 See also
-    Foam::Function1Types
-    Foam::fixedValueFvPatchField
-    Foam::uniformFixedValueFvPatchField.C
+  - Foam::interpolationTable
+  - Foam::fixedValueFaPatchField
 
 SourceFiles
-    uniformFixedValueFaPatchField.C
+    timeVaryingUniformFixedValueFaPatchField.C
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef uniformFixedValueFaPatchField_H
-#define uniformFixedValueFaPatchField_H
+#ifndef timeVaryingUniformFixedValueFaPatchField_H
+#define timeVaryingUniformFixedValueFaPatchField_H
 
 #include "fixedValueFaPatchField.H"
-#include "Function1.H"
+#include "interpolationTable.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -67,56 +85,56 @@ namespace Foam
 {
 
 /*---------------------------------------------------------------------------*\
-                  Class uniformFixedValueFaPatch Declaration
+             Class timeVaryingUniformFixedValueFaPatch Declaration
 \*---------------------------------------------------------------------------*/
 
 template<class Type>
-class uniformFixedValueFaPatchField
+class timeVaryingUniformFixedValueFaPatchField
 :
     public fixedValueFaPatchField<Type>
 {
     // Private Data
 
-        //- Value
-        autoPtr<Function1<Type>> uniformValue_;
+        //- The time series being used, including the bounding treatment
+        interpolationTable<Type> timeSeries_;
 
 
 public:
 
     //- Runtime type information
-    TypeName("uniformFixedValue");
+    TypeName("timeVaryingUniformFixedValue");
 
 
     // Constructors
 
         //- Construct from patch and internal field
-        uniformFixedValueFaPatchField
+        timeVaryingUniformFixedValueFaPatchField
         (
             const faPatch&,
             const DimensionedField<Type, areaMesh>&
         );
 
         //- Construct from patch, internal field and dictionary
-        uniformFixedValueFaPatchField
+        timeVaryingUniformFixedValueFaPatchField
         (
             const faPatch&,
             const DimensionedField<Type, areaMesh>&,
             const dictionary&
         );
 
-        //- Construct by mapping onto a new patch
-        uniformFixedValueFaPatchField
+        //- Construct by mapping given patch field onto a new patch
+        timeVaryingUniformFixedValueFaPatchField
         (
-            const uniformFixedValueFaPatchField<Type>&,
+            const timeVaryingUniformFixedValueFaPatchField<Type>&,
             const faPatch&,
             const DimensionedField<Type, areaMesh>&,
             const faPatchFieldMapper&
         );
 
-        //- Copy construct
-        uniformFixedValueFaPatchField
+        //- Construct as copy
+        timeVaryingUniformFixedValueFaPatchField
         (
-            const uniformFixedValueFaPatchField<Type>&
+            const timeVaryingUniformFixedValueFaPatchField<Type>&
         );
 
         //- Construct and return a clone
@@ -124,14 +142,14 @@ public:
         {
             return tmp<faPatchField<Type>>
             (
-                new uniformFixedValueFaPatchField<Type>(*this)
+                new timeVaryingUniformFixedValueFaPatchField<Type>(*this)
             );
         }
 
         //- Construct as copy setting internal field reference
-        uniformFixedValueFaPatchField
+        timeVaryingUniformFixedValueFaPatchField
         (
-            const uniformFixedValueFaPatchField<Type>&,
+            const timeVaryingUniformFixedValueFaPatchField<Type>&,
             const DimensionedField<Type, areaMesh>&
         );
 
@@ -143,22 +161,36 @@ public:
         {
             return tmp<faPatchField<Type>>
             (
-                new uniformFixedValueFaPatchField<Type>(*this, iF)
+                new timeVaryingUniformFixedValueFaPatchField<Type>(*this, iF)
             );
         }
 
 
     //- Destructor
-    virtual ~uniformFixedValueFaPatchField() = default;
+    virtual ~timeVaryingUniformFixedValueFaPatchField() = default;
 
 
     // Member Functions
 
+        // Access
+
+            //- Return the time series used
+            const interpolationTable<Type>& timeSeries() const
+            {
+                return timeSeries_;
+            }
+
+
+        // Evaluation
+
             //- Update the coefficients associated with the patch field
             virtual void updateCoeffs();
 
+
+        // IO
+
             //- Write
-        virtual void write(Ostream& os) const;
+            virtual void write(Ostream&) const;
 };
 
 
@@ -169,7 +201,7 @@ public:
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 #ifdef NoRepository
-    #include "uniformFixedValueFaPatchField.C"
+    #include "timeVaryingUniformFixedValueFaPatchField.C"
 #endif
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

src/finiteArea/fields/faPatchFields/derived/timeVaryingUniformFixedValue/timeVaryingUniformFixedValueFaPatchFields.C

@@ -0,0 +1,46 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2016-2017 Wikki Ltd
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "timeVaryingUniformFixedValueFaPatchFields.H"
+#include "addToRunTimeSelectionTable.H"
+#include "areaFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+makeFaPatchFields(timeVaryingUniformFixedValue);
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// ************************************************************************* //

src/finiteArea/fields/faPatchFields/derived/timeVaryingUniformFixedValue/timeVaryingUniformFixedValueFaPatchFields.H

@@ -0,0 +1,52 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2016-2017 Wikki Ltd
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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/>.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef timeVaryingUniformFixedValueFaPatchFields_H
+#define timeVaryingUniformFixedValueFaPatchFields_H
+
+#include "timeVaryingUniformFixedValueFaPatchField.H"
+#include "fieldTypes.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+makeFaPatchTypeFieldTypedefs(timeVaryingUniformFixedValue)
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/finiteArea/fields/faPatchFields/derived/timeVaryingUniformFixedValue/timeVaryingUniformFixedValueFaPatchFieldsFwd.H

@@ -0,0 +1,54 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2016-2017 Wikki Ltd
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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/>.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef timeVaryingUniformFixedValueFaPatchFieldsFwd_H
+#define timeVaryingUniformFixedValueFaPatchFieldsFwd_H
+
+#include "faPatchField.H"
+#include "fieldTypes.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+template<class Type> class timeVaryingUniformFixedValueFaPatchField;
+
+makeFaPatchTypeFieldTypedefs(timeVaryingUniformFixedValue);
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/finiteArea/fields/faPatchFields/faPatchField/faPatchField.H

@@ -81,7 +81,7 @@ class faPatchField
 :
     public Field<Type>
 {
-    // Private data
+    // Private Data
 
         //- Reference to a patch
         const faPatch& patch_;
@@ -94,8 +94,8 @@ class faPatchField
         bool updated_;
 
         //- Optional patch type, used to allow specified boundary conditions
-        //  to be applied to constraint patches by providing the constraint
-        //  patch type as 'patchType'
+        //- to be applied to constraint patches by providing the constraint
+        //- patch type as 'patchType'
         word patchType_;
 
 
@@ -217,7 +217,7 @@ public:
     // Selectors
 
         //- Return a pointer to a new patchField created on freestore given
-        //  patch and internal field
+        //- patch and internal field
         //  (does not set the patch field values)
         static tmp<faPatchField<Type>> New
         (
@@ -228,7 +228,7 @@ public:
         );
 
         //- Return a pointer to a new patchField created on freestore given
-        //  patch and internal field
+        //- patch and internal field
         //  (does not set the patch field values)
         static tmp<faPatchField<Type>> New
         (
@@ -238,7 +238,7 @@ public:
         );
 
         //- Return a pointer to a new patchField created on freestore from
-        //  a given faPatchField mapped onto a new patch
+        //- a given faPatchField mapped onto a new patch
         static tmp<faPatchField<Type>> New
         (
             const faPatchField<Type>&,
@@ -248,7 +248,7 @@ public:
         );
 
         //- Return a pointer to a new patchField created on freestore
-        //  from dictionary
+        //- from dictionary
         static tmp<faPatchField<Type>> New
         (
             const faPatch&,
@@ -257,7 +257,7 @@ public:
         );
 
         //- Return a pointer to a new calculatedFaPatchField created on
-        //  freestore without setting patchField values
+        //- freestore without setting patchField values
         template<class Type2>
         static tmp<faPatchField<Type>> NewCalculatedType
         (
@@ -269,7 +269,7 @@ public:
     virtual ~faPatchField<Type>() = default;
 
 
-    // Member functions
+    // Member Functions
 
         // Access
 
@@ -330,7 +330,7 @@ public:
             }
 
 
-        // Mapping functions
+        // Mapping
 
             //- Map (and resize as needed) from self given a mapping object
             virtual void autoMap
@@ -346,7 +346,7 @@ public:
             );
 
 
-        // Evaluation functions
+        // Evaluation
 
             //- Return patch-normal gradient
             virtual tmp<Field<Type>> snGrad() const;
@@ -383,9 +383,8 @@ public:
                     Pstream::commsTypes::blocking
             );
 
-
             //- Return the matrix diagonal coefficients corresponding to the
-            //  evaluation of the value of this patchField with given weights
+            //- evaluation of the value of this patchField with given weights
             virtual tmp<Field<Type>> valueInternalCoeffs
             (
                 const tmp<Field<scalar>>&
@@ -396,7 +395,7 @@ public:
             }
 
             //- Return the matrix source coefficients corresponding to the
-            //  evaluation of the value of this patchField with given weights
+            //- evaluation of the value of this patchField with given weights
             virtual tmp<Field<Type>> valueBoundaryCoeffs
             (
                 const tmp<Field<scalar>>&
@@ -407,7 +406,7 @@ public:
             }
 
             //- Return the matrix diagonal coefficients corresponding to the
-            //  evaluation of the gradient of this patchField
+            //- evaluation of the gradient of this patchField
             virtual tmp<Field<Type>> gradientInternalCoeffs() const
             {
                 NotImplemented;
@@ -415,7 +414,7 @@ public:
             }
 
             //- Return the matrix source coefficients corresponding to the
-            //  evaluation of the gradient of this patchField
+            //- evaluation of the gradient of this patchField
             virtual tmp<Field<Type>> gradientBoundaryCoeffs() const
             {
                 NotImplemented;
@@ -423,6 +422,8 @@ public:
             }
 
 
+        // IO
+
             //- Write
             virtual void write(Ostream&) const;
 
@@ -433,7 +434,7 @@ public:
             void check(const faPatchField<Type>&) const;
 
 
-    // Member operators
+    // Member Operators
 
         virtual void operator=(const UList<Type>&);
 

src/finiteArea/fields/faPatchFields/faPatchField/faPatchFieldNew.C

@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2016-2017 Wikki Ltd
-    Copyright (C) 2019 OpenCFD Ltd.
+    Copyright (C) 2019-2020 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -37,7 +37,12 @@ Foam::tmp<Foam::faPatchField<Type>> Foam::faPatchField<Type>::New
     const DimensionedField<Type, areaMesh>& iF
 )
 {
-    DebugInFunction << "Constructing faPatchField<Type>" << endl;
+    DebugInFunction
+        << "Constructing faPatchField<Type> "
+        << "patchFieldType:" << patchFieldType
+        << "actualPatchType:" << actualPatchType
+        << "p.Type():" << p.type()
+        << endl;
 
     auto cstrIter = patchConstructorTablePtr_->cfind(patchFieldType);
 

src/finiteArea/finiteArea/fam/famSup.C

@@ -165,9 +165,19 @@ SuSp
     );
     faMatrix<Type>& fam = tfam.ref();
 
-    fam.diag() += mesh.S()*max(sp.internalField(), scalar(0));
+   fam.diag() +=
+        mesh.S()*max
+        (
+            sp.internalField(),
+            dimensionedScalar("0", sp.dimensions(), Zero)
+        );
 
-    fam.source() -= mesh.S()*min(sp.internalField(), scalar(0))
+    fam.source() -=
+        mesh.S()*min
+        (
+            sp.internalField(),
+            dimensionedScalar("0", sp.dimensions(), Zero)
+        )
         *vf.internalField();
 
     return tfam;

src/finiteArea/interpolation/edgeInterpolation/edgeInterpolate.C

@@ -281,6 +281,7 @@ Foam::fac::interpolate
     tmp<GeometricField<Type, faePatchField, edgeMesh>> tsf =
         interpolate(tvf());
     tvf.clear();
+
     return tsf;
 }
 

src/finiteArea/interpolation/edgeInterpolation/edgeInterpolation.C

@@ -6,6 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2016-2017 Wikki Ltd
+    Copyright (C) 2020 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -47,8 +48,6 @@ void Foam::edgeInterpolation::clearOut()
     deleteDemandDrivenData(differenceFactors_);
     deleteDemandDrivenData(correctionVectors_);
     deleteDemandDrivenData(skewCorrectionVectors_);
-//     deleteDemandDrivenData(leastSquarePvectors_);
-//     deleteDemandDrivenData(leastSquareNvectors_);
 }
 
 
@@ -64,8 +63,6 @@ Foam::edgeInterpolation::edgeInterpolation(const faMesh& fam)
     correctionVectors_(nullptr),
     skew_(true),
     skewCorrectionVectors_(nullptr)
-//     leastSquarePvectors_(nullptr),
-//     leastSquareNvectors_(nullptr)
 {}
 
 
@@ -161,30 +158,6 @@ Foam::edgeInterpolation::skewCorrectionVectors() const
 }
 
 
-// const Foam::edgeVectorField&
-// Foam::edgeInterpolation::leastSquarePvectors() const
-// {
-//     if (!leastSquarePvectors_)
-//     {
-//         makeLeastSquareVectors();
-//     }
-//
-//     return (*leastSquarePvectors_);
-// }
-
-
-// const Foam::edgeVectorField&
-// Foam::edgeInterpolation::leastSquareNvectors() const
-// {
-//     if (!leastSquareNvectors_)
-//     {
-//         makeLeastSquareVectors();
-//     }
-//
-//     return (*leastSquareNvectors_);
-// }
-
-
 bool Foam::edgeInterpolation::movePoints() const
 {
     deleteDemandDrivenData(lPN_);
@@ -197,9 +170,6 @@ bool Foam::edgeInterpolation::movePoints() const
     skew_ = true;
     deleteDemandDrivenData(skewCorrectionVectors_);
 
-//     deleteDemandDrivenData(leastSquarePvectors_);
-//     deleteDemandDrivenData(leastSquareNvectors_);
-
     return true;
 }
 
@@ -527,10 +497,12 @@ void Foam::edgeInterpolation::makeCorrectionVectors() const
           - deltaCoeffs[edgeI]*unitDelta;
     }
 
+
     edgeVectorField::Boundary& CorrVecsbf = CorrVecs.boundaryFieldRef();
-    for (faePatchVectorField& patchCorrVecs : CorrVecsbf)
+
+    forAll(CorrVecs.boundaryField(), patchI)
     {
-        patchCorrVecs = vector::zero;
+        mesh().boundary()[patchI].makeCorrectionVectors(CorrVecsbf[patchI]);
     }
 
     scalar NonOrthogCoeff = 0.0;

src/finiteArea/interpolation/edgeInterpolation/schemes/skewCorrected/skewCorrectedEdgeInterpolation.H

@@ -0,0 +1,219 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2016-2017 Wikki Ltd
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::skewCorrectedEdgeInterpolation
+
+Description
+    Linear/upwind blended differencing scheme
+
+SourceFiles
+    skewCorrectedEdgeInterpolationMake.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef skewCorrectedEdgeInterpolation_H
+#define skewCorrectedEdgeInterpolation_H
+
+#include "edgeInterpolationScheme.H"
+#include "linearEdgeInterpolation.H"
+#include "gaussFaGrad.H"
+#include "areaFields.H"
+#include "zeroGradientFaPatchFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                 Class skewCorrectedEdgeInterpolation Declaration
+\*---------------------------------------------------------------------------*/
+
+template<class Type>
+class skewCorrectedEdgeInterpolation
+:
+    virtual public edgeInterpolationScheme<Type>
+{
+    // Private Data
+
+        tmp<edgeInterpolationScheme<Type>> tScheme_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("skewCorrected");
+
+
+    // Constructors
+
+        //- Construct from Istream
+        skewCorrectedEdgeInterpolation(const faMesh& mesh, Istream& is)
+        :
+            edgeInterpolationScheme<Type>(mesh),
+            tScheme_
+            (
+                edgeInterpolationScheme<Type>::New(mesh, is)
+            )
+        {}
+
+        //- Construct from mesh, faceFlux and blendingFactor
+        skewCorrectedEdgeInterpolation
+        (
+            const faMesh& mesh,
+            const edgeScalarField& faceFlux,
+            Istream& is
+        )
+        :
+            edgeInterpolationScheme<Type>(mesh),
+            tScheme_
+            (
+                edgeInterpolationScheme<Type>::New(mesh, faceFlux, is)
+            )
+        {}
+
+        //- No copy construct
+        skewCorrectedEdgeInterpolation(const skewCorrectedEdgeInterpolation&) =
+            delete;
+
+        //- No copy assignment
+        void operator=(const skewCorrectedEdgeInterpolation&) = delete;
+
+
+    // Member Functions
+
+        //- Return the interpolation weighting factors
+        virtual tmp<edgeScalarField> weights
+        (
+            const GeometricField<Type, faPatchField, areaMesh>& vf
+        ) const
+        {
+            return tScheme_().weights(vf);
+        }
+
+         //- Return true if this scheme uses an explicit correction
+        virtual bool corrected() const
+        {
+            return
+                tScheme_().corrected() || (this->mesh()).skew();
+        }
+
+        tmp<GeometricField<Type, faePatchField, edgeMesh>>
+        skewCorrection
+        (
+            const GeometricField<Type, faPatchField, areaMesh>& vf
+        ) const
+        {
+            const faMesh& mesh = this->mesh();
+
+            const edgeVectorField& scv = mesh.skewCorrectionVectors();
+
+            tmp<GeometricField<Type, faePatchField, edgeMesh>> tsfCorr
+            (
+                new GeometricField<Type, faePatchField, edgeMesh>
+                (
+                    IOobject
+                    (
+                        "skewCorrected::skewCorrection(" + vf.name() + ')',
+                        vf.instance(),
+                        vf.db()
+                    ),
+                    mesh,
+                    dimensioned<Type>(vf.dimensions(), Zero)
+                )
+            );
+
+            GeometricField<Type, faePatchField, edgeMesh>& corr = tsfCorr.ref();
+
+            for (direction cmpt=0; cmpt<pTraits<Type>::nComponents; ++cmpt)
+            {
+                corr.replace
+                (
+                    cmpt,
+                    scv & linearEdgeInterpolation
+                    <
+                        typename outerProduct
+                        <
+                            vector,
+                            typename pTraits<Type>::cmptType
+                        >::type
+                    >(mesh).interpolate
+                    (
+                        fa::gaussGrad<typename pTraits<Type>::cmptType>
+                        (mesh).grad(vf.component(cmpt))
+                    )
+                );
+            }
+
+            return tsfCorr;
+        }
+
+
+        //- Return the explicit correction to the face-interpolate
+        virtual tmp<GeometricField<Type, faePatchField, edgeMesh>>
+        correction
+        (
+            const GeometricField<Type, faPatchField, areaMesh>& vf
+        ) const
+        {
+            if
+            (
+                tScheme_().corrected()
+             && (this->mesh()).skew()
+            )
+            {
+                return tScheme_().correction(vf) + skewCorrection(vf);
+            }
+            else if (tScheme_().corrected())
+            {
+                return tScheme_().correction(vf);
+            }
+            else if ((this->mesh()).skew())
+            {
+                return skewCorrection(vf);
+            }
+            else
+            {
+                return
+                    tmp<GeometricField<Type, faePatchField, edgeMesh>>
+                    (
+                        nullptr
+                    );
+            }
+        }
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/finiteArea/interpolation/edgeInterpolation/schemes/skewCorrected/skewCorrectedEdgeInterpolationMake.C

@@ -0,0 +1,39 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2016-2017 Wikki Ltd
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "faMesh.H"
+#include "skewCorrectedEdgeInterpolation.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    makeEdgeInterpolationScheme(skewCorrectedEdgeInterpolation)
+}
+
+// ************************************************************************* //

src/finiteArea/interpolation/volSurfaceMapping/volSurfaceMapping.C

@@ -6,6 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2016-2017 Wikki Ltd
+    Copyright (C) 2020 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -38,11 +39,8 @@ Foam::tmp<Foam::Field<Type>> Foam::volSurfaceMapping::mapToSurface
     // Grab labels for all faces in faMesh
     const labelList& faceLabels = mesh_.faceLabels();
 
-    tmp<Field<Type>> tresult
-    (
-        new Field<Type>(faceLabels.size(), Zero)
-    );
-    Field<Type>& result = tresult.ref();
+    auto tresult = tmp<Field<Type>>::New(faceLabels.size(), Zero);
+    auto& result = tresult.ref();
 
     // Get reference to volume mesh
     const polyMesh& pMesh = mesh_();
@@ -67,6 +65,41 @@ Foam::tmp<Foam::Field<Type>> Foam::volSurfaceMapping::mapToSurface
 }
 
 
+template<class Type>
+Foam::tmp<Foam::Field<Type>> Foam::volSurfaceMapping::mapInternalToSurface
+(
+    const typename GeometricField<Type, fvPatchField, volMesh>::Boundary& df
+) const
+{
+    // Grab labels for all faces in faMesh
+    const labelList& faceLabels = mesh_.faceLabels();
+
+    auto tresult = tmp<Field<Type>>::New(faceLabels.size(), Zero);
+    auto& result = tresult.ref();
+
+    // Get reference to volume mesh
+    const polyMesh& pMesh = mesh_();
+    const polyBoundaryMesh& bm = pMesh.boundaryMesh();
+
+    label patchID, faceID;
+
+    // Grab droplet cloud source by identifying patch and face
+    forAll(faceLabels, i)
+    {
+        // Escape if face is beyond active faces, eg belongs to a face zone
+        if (faceLabels[i] < pMesh.nFaces())
+        {
+            patchID = bm.whichPatch(faceLabels[i]);
+            faceID = bm[patchID].whichFace(faceLabels[i]);
+
+            result[i] = df[patchID].patchInternalField()()[faceID];
+        }
+    }
+
+    return tresult;
+}
+
+
 template<class Type>
 void Foam::volSurfaceMapping::mapToVolume
 (
@@ -112,4 +145,31 @@ void Foam::volSurfaceMapping::mapToVolume
 }
 
 
+template<class Type>
+void Foam::volSurfaceMapping::mapToField
+(
+    const GeometricField<Type, faPatchField, areaMesh>& af,
+    Field<Type>& f
+) const
+{
+    const labelList& faceLabels = mesh_.faceLabels();
+
+    const polyMesh& pMesh = mesh_();
+    const polyBoundaryMesh& bm = pMesh.boundaryMesh();
+    label patchID, faceID;
+
+    const Field<Type>& afi = af.internalField();
+
+    forAll(faceLabels, i)
+    {
+        if (faceLabels[i] < pMesh.nFaces())
+        {
+            patchID = bm.whichPatch(faceLabels[i]);
+            faceID = bm[patchID].whichFace(faceLabels[i]);
+            f[faceID] = afi[i];
+        }
+    }
+}
+
+
 // ************************************************************************* //

src/finiteArea/interpolation/volSurfaceMapping/volSurfaceMapping.H

@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2016-2017 Wikki Ltd
-    Copyright (C) 2019 OpenCFD Ltd.
+    Copyright (C) 2019-2020 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -56,21 +56,12 @@ template<class Type> class fvPatchField;
 
 class volSurfaceMapping
 {
-    // Private data
+    // Private Data
 
         //- Reference to mesh
         const faMesh& mesh_;
 
 
-    // Private Member Functions
-
-        //- No copy construct
-        volSurfaceMapping(const volSurfaceMapping&) = delete;
-
-        //- No copy assignment
-        void operator=(const volSurfaceMapping&) = delete;
-
-
 public:
 
     // Constructors
@@ -81,6 +72,12 @@ public:
             mesh_(mesh)
         {}
 
+        //- No copy construct
+        volSurfaceMapping(const volSurfaceMapping&) = delete;
+
+        //- No copy assignment
+        void operator=(const volSurfaceMapping&) = delete;
+
 
     //- Destructor
     ~volSurfaceMapping() = default;
@@ -96,6 +93,15 @@ public:
             GeometricField<Type, fvPatchField, volMesh>::Boundary& df
         ) const;
 
+
+        //- Map patch internal field to surface
+        template<class Type>
+        tmp<Field<Type>> mapInternalToSurface
+        (
+            const typename
+            GeometricField<Type, fvPatchField, volMesh>::Boundary& df
+        ) const;
+
         //- Map surface field to volume boundary field
         template<class Type>
         void mapToVolume
@@ -104,12 +110,22 @@ public:
             typename GeometricField<Type, fvPatchField, volMesh>::Boundary& bf
         ) const;
 
+        //- Map surface tmp field to volume boundary field
         template<class Type>
         void mapToVolume
         (
             const tmp<GeometricField<Type, faPatchField, areaMesh>>& taf,
             typename GeometricField<Type, fvPatchField, volMesh>::Boundary& bf
         ) const;
+
+        //- Map surface field to field assumes Field
+        //- faces in the same order as Boundary
+        template<class Type>
+        void mapToField
+        (
+            const GeometricField<Type, faPatchField, areaMesh>& af,
+            Field<Type>& f
+        ) const;
 };
 
 

src/finiteVolume/Make/files

@@ -227,6 +227,7 @@ $(derivedFvPatchFields)/fixedProfile/fixedProfileFvPatchFields.C
 $(derivedFvPatchFields)/plenumPressure/plenumPressureFvPatchScalarField.C
 $(derivedFvPatchFields)/interfaceCompression/interfaceCompressionFvPatchScalarField.C
 $(derivedFvPatchFields)/swirlFanVelocity/swirlFanVelocityFvPatchField.C
+$(derivedFvPatchFields)/acousticWaveTransmissive/acousticWaveTransmissiveFvPatchFields.C
 
 $(derivedFvPatchFields)/mappedMixed/mappedMixedFvPatchFields.C
 $(derivedFvPatchFields)/mappedField/Sampled/makeSampledPatchFunction1s.C

src/finiteVolume/fields/fvPatchFields/derived/acousticWaveTransmissive/acousticWaveTransmissiveFvPatchField.C

@@ -0,0 +1,119 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "acousticWaveTransmissiveFvPatchField.H"
+#include "addToRunTimeSelectionTable.H"
+#include "fvPatchFieldMapper.H"
+#include "volFields.H"
+#include "EulerDdtScheme.H"
+#include "CrankNicolsonDdtScheme.H"
+#include "backwardDdtScheme.H"
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+template<class Type>
+Foam::acousticWaveTransmissiveFvPatchField<Type>::acousticWaveTransmissiveFvPatchField
+(
+    const fvPatch& p,
+    const DimensionedField<Type, volMesh>& iF
+)
+:
+    advectiveFvPatchField<Type>(p, iF),
+    advectiveU_(0)
+{}
+
+
+template<class Type>
+Foam::acousticWaveTransmissiveFvPatchField<Type>::acousticWaveTransmissiveFvPatchField
+(
+    const acousticWaveTransmissiveFvPatchField& ptf,
+    const fvPatch& p,
+    const DimensionedField<Type, volMesh>& iF,
+    const fvPatchFieldMapper& mapper
+)
+:
+    advectiveFvPatchField<Type>(ptf, p, iF, mapper),
+    advectiveU_(ptf.advectiveU_)
+{}
+
+
+template<class Type>
+Foam::acousticWaveTransmissiveFvPatchField<Type>::acousticWaveTransmissiveFvPatchField
+(
+    const fvPatch& p,
+    const DimensionedField<Type, volMesh>& iF,
+    const dictionary& dict
+)
+:
+    advectiveFvPatchField<Type>(p, iF, dict),
+    advectiveU_(dict.get<scalar>("advectiveSpeed"))
+{}
+
+
+template<class Type>
+Foam::acousticWaveTransmissiveFvPatchField<Type>::acousticWaveTransmissiveFvPatchField
+(
+    const acousticWaveTransmissiveFvPatchField& ptpsf
+)
+:
+    advectiveFvPatchField<Type>(ptpsf),
+    advectiveU_(ptpsf.advectiveU_)
+{}
+
+
+template<class Type>
+Foam::acousticWaveTransmissiveFvPatchField<Type>::acousticWaveTransmissiveFvPatchField
+(
+    const acousticWaveTransmissiveFvPatchField& ptpsf,
+    const DimensionedField<Type, volMesh>& iF
+)
+:
+    advectiveFvPatchField<Type>(ptpsf, iF),
+    advectiveU_(ptpsf.advectiveU_)
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class Type>
+Foam::tmp<Foam::scalarField>
+Foam::acousticWaveTransmissiveFvPatchField<Type>::advectionSpeed() const
+{
+    return tmp<scalarField>::New(this->size(), advectiveU_);
+}
+
+
+template<class Type>
+void Foam::acousticWaveTransmissiveFvPatchField<Type>::write(Ostream& os) const
+{
+    fvPatchField<Type>::write(os);
+    os.writeEntry("advectiveSpeed", advectiveU_);
+    this->writeEntry("value", os);
+}
+
+
+// ************************************************************************* //

src/finiteVolume/fields/fvPatchFields/derived/acousticWaveTransmissive/acousticWaveTransmissiveFvPatchField.H

@@ -0,0 +1,192 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::acousticWaveTransmissiveFvPatchField
+
+Group
+    grpOutletBoundaryConditions
+
+Description
+    This boundary condition provides a wave transmissive outflow condition,
+    based on solving DDt(W, field) = 0 at the boundary \c W is the wave velocity
+    and \c field is the field to which this boundary condition is applied.
+    The wave speed is input in the BC.
+
+Usage
+    Example of the boundary condition specification:
+    \verbatim
+    <patchName>
+    {
+        // Mandatory entries (unmodifiable)
+        type                acousticWaveTransmissive;
+        advectiveSpeed      50.0;
+
+        // Mandatory/Optional (inherited) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property | Description                          | Type  | Reqd | Dflt
+      type     | Type name: acousticWaveTransmissive  | word  | yes  | -
+      advectiveSpeed | Advective speed value          | scalar | yes | -
+    \endtable
+
+    The inherited entries are elaborated in:
+      - \link advectiveFvPatchField.H \endlink
+
+See also
+  - Foam::advectiveFvPatchFields
+
+SourceFiles
+    acousticWaveTransmissiveFvPatchField.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef acousticWaveTransmissiveFvPatchField_H
+#define acousticWaveTransmissiveFvPatchField_H
+
+#include "advectiveFvPatchFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                Class acousticWaveTransmissiveFvPatchField Declaration
+\*---------------------------------------------------------------------------*/
+
+template<class Type>
+class acousticWaveTransmissiveFvPatchField
+:
+    public advectiveFvPatchField<Type>
+{
+    // Private Data
+
+        //- Advection speed value
+        scalar advectiveU_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("acousticWaveTransmissive");
+
+
+    // Constructors
+
+        //- Construct from patch and internal field
+        acousticWaveTransmissiveFvPatchField
+        (
+            const fvPatch&,
+            const DimensionedField<Type, volMesh>&
+        );
+
+        //- Construct from patch, internal field and dictionary
+        acousticWaveTransmissiveFvPatchField
+        (
+            const fvPatch&,
+            const DimensionedField<Type, volMesh>&,
+            const dictionary&
+        );
+
+        //- Construct by mapping given acousticWaveTransmissiveFvPatchField
+        //- onto a new patch
+        acousticWaveTransmissiveFvPatchField
+        (
+            const acousticWaveTransmissiveFvPatchField<Type>&,
+            const fvPatch&,
+            const DimensionedField<Type, volMesh>&,
+            const fvPatchFieldMapper&
+        );
+
+        //- Construct as copy
+        acousticWaveTransmissiveFvPatchField
+        (
+            const acousticWaveTransmissiveFvPatchField&
+        );
+
+        //- Construct and return a clone
+        virtual tmp<fvPatchField<Type>> clone() const
+        {
+            return tmp<fvPatchField<Type>>
+            (
+                new acousticWaveTransmissiveFvPatchField<Type>(*this)
+            );
+        }
+
+        //- Construct as copy setting internal field reference
+        acousticWaveTransmissiveFvPatchField
+        (
+            const acousticWaveTransmissiveFvPatchField&,
+            const DimensionedField<Type, volMesh>&
+        );
+
+        //- Construct and return a clone setting internal field reference
+        virtual tmp<fvPatchField<Type>> clone
+        (
+            const DimensionedField<Type, volMesh>& iF
+        ) const
+        {
+            return tmp<fvPatchField<Type>>
+            (
+                new acousticWaveTransmissiveFvPatchField<Type>(*this, iF)
+            );
+        }
+
+
+    // Member Functions
+
+        // Evaluation
+
+            //- Calculate and return the advection speed at the boundary
+            virtual tmp<scalarField> advectionSpeed() const;
+
+
+        // IO
+
+            //- Write
+            virtual void write(Ostream&) const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+    #include "acousticWaveTransmissiveFvPatchField.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/finiteVolume/fields/fvPatchFields/derived/acousticWaveTransmissive/acousticWaveTransmissiveFvPatchFields.C

@@ -0,0 +1,46 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "volFields.H"
+#include "surfaceFields.H"
+#include "acousticWaveTransmissiveFvPatchFields.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+makePatchFields(acousticWaveTransmissive);
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// ************************************************************************* //

src/finiteVolume/fields/fvPatchFields/derived/acousticWaveTransmissive/acousticWaveTransmissiveFvPatchFields.H

@@ -0,0 +1,51 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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/>.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef acousticWaveTransmissiveFvPatchFields_H
+#define acousticWaveTransmissiveFvPatchFields_H
+
+#include "acousticWaveTransmissiveFvPatchField.H"
+#include "fieldTypes.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+makePatchTypeFieldTypedefs(acousticWaveTransmissive);
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/finiteVolume/fields/fvPatchFields/derived/acousticWaveTransmissive/acousticWaveTransmissiveFvPatchFieldsFwd.H

@@ -25,10 +25,9 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef uniformFixedValueFaPatchFieldsFwd_H
-#define uniformFixedValueFaPatchFieldsFwd_H
+#ifndef acousticWaveTransmissiveFvPatchFieldsFwd_H
+#define acousticWaveTransmissiveFvPatchFieldsFwd_H
 
-#include "faPatchField.H"
 #include "fieldTypes.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -38,9 +37,9 @@ namespace Foam
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-template<class Type> class uniformFixedValueFaPatchField;
+template<class Type> class acousticWaveTransmissiveFvPatchField;
 
-makeFaPatchTypeFieldTypedefs(uniformFixedValue);
+makePatchTypeFieldTypedefs(acousticWaveTransmissive);
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 

src/regionFaModels/KirchhoffShell/KirchhoffShell.C

@@ -0,0 +1,319 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "KirchhoffShell.H"
+#include "addToRunTimeSelectionTable.H"
+#include "fvPatchFields.H"
+#include "zeroGradientFaPatchFields.H"
+#include "subCycle.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+defineTypeNameAndDebug(KirchhoffShell, 0);
+
+addToRunTimeSelectionTable(vibrationShellModel, KirchhoffShell, dictionary);
+
+// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
+
+bool KirchhoffShell::read(const dictionary& dict)
+{
+    this->solution().readEntry("nNonOrthCorr", nNonOrthCorr_);
+    return true;
+}
+
+
+void KirchhoffShell::solveDisplacement()
+{
+    if (debug)
+    {
+        InfoInFunction << endl;
+    }
+
+    const Time& time = primaryMesh().time();
+
+    areaScalarField solidMass(rho()*h_);
+    areaScalarField solidD(D()/solidMass);
+
+    // Save old times
+    areaScalarField w0(w_.oldTime());
+    areaScalarField w00(w_.oldTime().oldTime());
+
+    if (nSubCycles_ > 1)
+    {
+        // Restore the oldTime in sub-cycling
+        w_.oldTime() = w0_;
+        w_.oldTime().oldTime() = w00_;
+        laplaceW_.oldTime() = laplaceW0_;
+        laplace2W_.oldTime() = laplace2W0_;
+     }
+
+    for
+    (
+        subCycleTime wSubCycle
+        (
+            const_cast<Time&>(time),
+            nSubCycles_
+        );
+       !(++wSubCycle).end();
+    )
+    {
+
+        laplaceW_ = fac::laplacian(w_);
+        laplace2W_ = fac::laplacian(laplaceW_);
+
+        faScalarMatrix wEqn
+        (
+            fam::d2dt2(w_)
+         +  f1_*fam::ddt(w_)
+         -  f0_*sqrt(solidD)*fac::ddt(laplaceW_)
+         +  solidD*(laplace2W_ + f2_*fac::ddt(laplace2W_))
+        ==
+            ps_/solidMass
+          + faOptions()(solidMass, w_, dimLength/sqr(dimTime))
+        );
+
+        faOptions().constrain(wEqn);
+
+        wEqn.solve();
+
+        Info<< "w min/max   = " << min(w_) << ", " << max(w_) << endl;
+
+        if (wSubCycle.index() >= wSubCycle.nSubCycles())
+        {
+            // Cache oldTimes inside the sub-cycling
+            w0_ = w_.oldTime();
+            w00_ = w_.oldTime().oldTime();
+            laplaceW0_ = laplaceW_.oldTime();
+            laplace2W0_ = laplace2W_.oldTime();
+
+            // Update shell acceleration
+            a_ = fac::d2dt2(w_);
+        }
+    }
+
+    // Restore old time in main time
+    w_.oldTime() = w0;
+    w_.oldTime().oldTime() = w00;
+
+    faOptions().correct(w_);
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+KirchhoffShell::KirchhoffShell
+(
+    const word& modelType,
+    const fvPatch& patch,
+    const dictionary& dict
+)
+:
+    vibrationShellModel(modelType, patch, dict),
+    f0_("f0", dimless, dict),
+    f1_("f1", inv(dimTime), dict),
+    f2_("f2", dimTime, dict),
+    nNonOrthCorr_(1),
+    nSubCycles_(1),
+    ps_
+    (
+        IOobject
+        (
+            "ps_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::READ_IF_PRESENT,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(dimPressure, Zero)
+    ),
+    h_
+    (
+        IOobject
+        (
+            "h_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::MUST_READ,
+            IOobject::AUTO_WRITE
+        ),
+        regionMesh()
+    ),
+    laplaceW_
+    (
+        IOobject
+        (
+            "laplaceW_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(inv(dimLength), Zero)
+    ),
+    laplace2W_
+    (
+        IOobject
+        (
+            "laplace2W_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(inv(pow3(dimLength)), Zero)
+    ),
+    w0_
+    (
+        IOobject
+        (
+            "w0_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(dimLength, Zero)
+    ),
+    w00_
+    (
+         IOobject
+        (
+            "w00_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(dimLength, Zero)
+    ),
+    laplaceW0_
+    (
+         IOobject
+        (
+            "laplaceW0_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(inv(dimLength), Zero)
+    ),
+    laplace2W0_
+    (
+         IOobject
+        (
+            "laplace2W0_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::NO_READ,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(inv(pow3(dimLength)), Zero)
+    )
+{
+    init();
+}
+
+
+// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
+
+void KirchhoffShell::init()
+{}
+
+
+void KirchhoffShell::preEvolveRegion()
+{}
+
+
+void KirchhoffShell::evolveRegion()
+{
+    nNonOrthCorr_ = solution().get<label>("nNonOrthCorr");
+    nSubCycles_ = solution().get<label>("nSubCycles");
+
+    for (int nonOrth=0; nonOrth<=nNonOrthCorr_; nonOrth++)
+    {
+        solveDisplacement();
+    }
+}
+
+
+const tmp<areaScalarField> KirchhoffShell::D() const
+{
+    const dimensionedScalar E("E", dimForce/dimArea , solid().E());
+    const dimensionedScalar nu("nu", dimless, solid().nu());
+
+    return tmp<areaScalarField>(E*pow3(h_)/(12*(1 - sqr(nu))));
+}
+
+
+const tmp<areaScalarField> KirchhoffShell::rho() const
+{
+    return tmp<areaScalarField>
+    (
+        new areaScalarField
+        (
+            IOobject
+            (
+                "rhos",
+                primaryMesh().time().timeName(),
+                primaryMesh(),
+                IOobject::NO_READ,
+                IOobject::NO_WRITE,
+                false
+            ),
+            regionMesh(),
+            dimensionedScalar("rho", dimDensity, solid().rho()),
+            zeroGradientFaPatchScalarField::typeName
+        )
+    );
+}
+
+
+void KirchhoffShell::info()
+{}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// ************************************************************************* //

src/regionFaModels/KirchhoffShell/KirchhoffShell.H

@@ -0,0 +1,217 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::regionFaModels::KirchhoffShell
+
+Description
+
+Usage
+    Example of the boundary condition specification:
+    \verbatim
+    <patchName>
+    {
+        // Mandatory/Optional (inherited) entries
+        ...
+
+        // Mandatory entries (unmodifiable)
+        vibrationShellModel   KirchhoffShell;
+        f0                    0.04;
+        f1                    0.0;
+        f2                    0.0;
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property   | Description                         | Type  | Reqd | Dflt
+      vibrationShellModel | Type name: KirchhoffShell  | word  | yes  | -
+      f0         | Damping coefficient [1/s]           | scalar | yes | -
+      f1         | Damping coefficient [1/s]           | scalar | yes | -
+      f2         | Damping coefficient [1/s]           | scalar | yes | -
+    \endtable
+
+    The inherited entries are elaborated in:
+      - \link vibrationShellModel.H \endlink
+
+SourceFiles
+    KirchhoffShell.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef KirchhoffShell_H
+#define KirchhoffShell_H
+
+#include "volFieldsFwd.H"
+#include "vibrationShellModel.H"
+#include "faMesh.H"
+#include "faCFD.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+/*---------------------------------------------------------------------------*\
+                        Class KirchhoffShell Declaration
+\*---------------------------------------------------------------------------*/
+
+class KirchhoffShell
+:
+    public vibrationShellModel
+{
+    // Private Data
+
+        //- Damping coefficients [1/s]
+        dimensionedScalar f0_;
+        dimensionedScalar f1_;
+        dimensionedScalar f2_;
+
+
+    // Private Member Functions
+
+        //- Initialize KirchhoffShell
+        void init();
+
+
+protected:
+
+    // Protected Data
+
+        // Solution parameters
+
+            //- Number of non orthogonal correctors
+            label nNonOrthCorr_;
+
+            //- Sub cycles
+            label nSubCycles_;
+
+
+        // Source term fields
+
+            //- External surface source [Pa]
+            areaScalarField ps_;
+
+            //- Thickness [m]
+            areaScalarField h_;
+
+            //- Laplace of the displacement
+            areaScalarField laplaceW_;
+
+            //- Laplace of the Laplace for the displacement
+            areaScalarField laplace2W_;
+
+            //- Cache w.oldTime() in sub-cycling
+            areaScalarField w0_;
+
+            //- Cache w.oldTime.oldTime() in sub-cycling
+            areaScalarField w00_;
+
+            //- Cache laplaceW.oldTime() in sub-cycling
+            areaScalarField laplaceW0_;
+
+            //- Cache laplace2.oldTime() in sub-cycling
+            areaScalarField laplace2W0_;
+
+
+    // Protected Member Functions
+
+        //- Read control parameters from dictionary
+        virtual bool read(const dictionary& dict);
+
+
+        // Equations
+
+            //- Solve energy equation
+            void solveDisplacement();
+
+
+public:
+
+    //- Runtime type information
+    TypeName("KirchhoffShell");
+
+
+    // Constructors
+
+        //- Construct from components and dict
+        KirchhoffShell
+        (
+            const word& modelType,
+            const fvPatch& patch,
+            const dictionary& dict
+        );
+
+        //- No copy construct
+        KirchhoffShell(const KirchhoffShell&) = delete;
+
+        //- No copy assignment
+        void operator=(const KirchhoffShell&) = delete;
+
+
+    //- Destructor
+    virtual ~KirchhoffShell() = default;
+
+
+    // Member Functions
+
+        // Fields
+
+            //- Return stiffness
+            const tmp<areaScalarField> D() const;
+
+            //- Return density [Kg/m3]
+            const tmp<areaScalarField> rho() const;
+
+
+        // Evolution
+
+            //- Pre-evolve  thermal baffle
+            virtual void preEvolveRegion();
+
+            //- Evolve the thermal baffle
+            virtual void evolveRegion();
+
+
+       // IO
+
+            //- Provide some feedback
+            virtual void info();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+
+#endif
+
+// ************************************************************************* //

src/regionFaModels/Make/files

@@ -0,0 +1,16 @@
+/* Region models */
+regionFaModel/regionFaModel.C
+thermalShellModel/thermalShellModel.C
+thermalShellModel/thermalShellModelNew.C
+vibrationShellModel/vibrationShellModel.C
+vibrationShellModel/vibrationShellModelNew.C
+
+/* Shell models */
+thermalShell/thermalShell.C
+KirchhoffShell/KirchhoffShell.C
+
+/* Boundary conditions */
+derivedFvPatchFields/thermalShell/thermalShellFvPatchScalarField.C
+derivedFvPatchFields/vibrationShell/vibrationShellFvPatchScalarField.C
+
+LIB = $(FOAM_LIBBIN)/libregionFaModels

src/regionFaModels/Make/options

@@ -0,0 +1,16 @@
+EXE_INC = \
+    -I$(LIB_SRC)/faOptions/lnInclude \
+    -I$(LIB_SRC)/finiteVolume/lnInclude \
+    -I$(LIB_SRC)/finiteArea/lnInclude \
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/thermophysicalModels/thermophysicalProperties/lnInclude \
+    -I$(LIB_SRC)/thermophysicalModels/specie/lnInclude \
+    -I$(LIB_SRC)/TurbulenceModels/compressible/lnInclude
+
+LIB_LIBS = \
+    -lfiniteVolume \
+    -lfiniteArea \
+    -lmeshTools \
+    -lthermophysicalProperties \
+    -lspecie \
+    -lfaOptions

src/regionFaModels/derivedFvPatchFields/doc/thermalBaffleBoundaryConditionsDoc.H

@@ -0,0 +1,34 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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/>.
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+\defgroup grpThermoBaffleBoundaryConditions Thermo baffle boundary conditions
+@{
+    \ingroup grpThermoBoundaryConditions
+    This group contains thermo baffle model boundary conditions
+@}
+
+\*---------------------------------------------------------------------------*/

src/regionFaModels/derivedFvPatchFields/thermalShell/thermalShellFvPatchScalarField.C

@@ -0,0 +1,152 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "thermalShellFvPatchScalarField.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace compressible
+{
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+thermalShellFvPatchScalarField::thermalShellFvPatchScalarField
+(
+    const fvPatch& p,
+    const DimensionedField<scalar, volMesh>& iF
+)
+:
+    fixedValueFvPatchField<scalar>(p, iF),
+    baffle_(),
+    dict_(dictionary::null)
+{}
+
+
+thermalShellFvPatchScalarField::thermalShellFvPatchScalarField
+(
+    const thermalShellFvPatchScalarField& ptf,
+    const fvPatch& p,
+    const DimensionedField<scalar, volMesh>& iF,
+    const fvPatchFieldMapper& mapper
+)
+:
+    fixedValueFvPatchField<scalar>
+    (
+        ptf,
+        p,
+        iF,
+        mapper
+    ),
+    baffle_(),
+    dict_(ptf.dict_)
+{}
+
+
+thermalShellFvPatchScalarField::thermalShellFvPatchScalarField
+(
+    const fvPatch& p,
+    const DimensionedField<scalar, volMesh>& iF,
+    const dictionary& dict
+)
+:
+    fixedValueFvPatchField<scalar>(p, iF, dict),
+    baffle_(),
+    dict_(dict)
+{
+    typedef regionModels::thermalShellModel baffle;
+
+    if (!baffle_)
+    {
+        baffle_.reset(baffle::New(p, dict).ptr());
+    }
+}
+
+
+thermalShellFvPatchScalarField::thermalShellFvPatchScalarField
+(
+    const thermalShellFvPatchScalarField& ptf,
+    const DimensionedField<scalar, volMesh>& iF
+)
+:
+    fixedValueFvPatchField<scalar>(ptf, iF),
+    baffle_(),
+    dict_(ptf.dict_)
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void thermalShellFvPatchScalarField::updateCoeffs()
+{
+    if (this->updated())
+    {
+        return;
+    }
+
+    baffle_->evolve();
+
+    volScalarField::Boundary& vfb =
+        db().lookupObjectRef<volScalarField>
+        (
+            this->internalField().name()
+        ).boundaryFieldRef();
+
+    baffle_->vsm().mapToVolume(baffle_->T(), vfb);
+
+    fixedValueFvPatchField<scalar>::updateCoeffs();
+}
+
+
+void thermalShellFvPatchScalarField::write(Ostream& os) const
+{
+    fixedValueFvPatchField<scalar>::write(os);
+
+    // Remove value and type already written by fixedValueFvPatchField
+    dict_.remove("value");
+    dict_.remove("type");
+    dict_.write(os, false);
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+makePatchTypeField
+(
+    fvPatchScalarField,
+    thermalShellFvPatchScalarField
+);
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace compressible
+} // End namespace Foam
+
+
+// ************************************************************************* //

src/regionFaModels/derivedFvPatchFields/thermalShell/thermalShellFvPatchScalarField.H

@@ -0,0 +1,184 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::compressible::thermalShellFvPatchScalarField
+
+Group
+    grpThermoBoundaryConditions
+
+Description
+    This boundary condition provides a coupled temperature condition between
+    a primary region (3D mesh) and a thermal shell model (2D mesh).
+
+    The primary region boundary creates the finite area region
+    and evolves its energy equation.
+
+Usage
+    Example of the boundary condition specification:
+    \verbatim
+    <masterPatchName>
+    {
+        // Mandatory entries (unmodifiable)
+        type                compressible::thermalShell;
+
+        // Mandatory/Optional (inherited) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property | Description                           | Type  | Reqd | Dflt
+      type     | Type name: compressible::thermalShell | word  | yes  | -
+    \endtable
+
+    The inherited entries are elaborated in:
+      - \link fixedValueFvPatchField.H \endlink
+      - \link thermalShellModel.H \endlink
+
+Note
+  - The two-dimensional area mesh needs to be
+    generated in the pre-processing steps.
+
+SourceFiles
+    thermalShellFvPatchScalarField.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef thermalShellFvPatchScalarField_H
+#define thermalShellFvPatchScalarField_H
+
+#include "autoPtr.H"
+#include "thermalShellModel.H"
+#include "fixedValueFvPatchFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace compressible
+{
+
+/*---------------------------------------------------------------------------*\
+             Class thermalShellFvPatchScalarField Declaration
+\*---------------------------------------------------------------------------*/
+
+class thermalShellFvPatchScalarField
+:
+    public fixedValueFvPatchField<scalar>
+{
+    // Private Data
+
+        //- Thermal baffle
+        autoPtr<regionModels::thermalShellModel> baffle_;
+
+        //- Dictionary
+        mutable dictionary dict_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("compressible::thermalShell");
+
+
+    // Constructors
+
+        //- Construct from patch and internal field
+        thermalShellFvPatchScalarField
+        (
+            const fvPatch&,
+            const DimensionedField<scalar, volMesh>&
+        );
+
+        //- Construct from patch, internal field and dictionary
+        thermalShellFvPatchScalarField
+        (
+            const fvPatch&,
+            const DimensionedField<scalar, volMesh>&,
+            const dictionary&
+        );
+
+        //- Construct by mapping given
+        //- thermalShellFvPatchScalarField onto a new patch
+        thermalShellFvPatchScalarField
+        (
+            const thermalShellFvPatchScalarField&,
+            const fvPatch&,
+            const DimensionedField<scalar, volMesh>&,
+            const fvPatchFieldMapper&
+        );
+
+        //- Construct and return a clone
+        virtual tmp<fvPatchScalarField> clone() const
+        {
+            return tmp<fvPatchScalarField>
+            (
+                new thermalShellFvPatchScalarField(*this)
+            );
+        }
+
+        //- Construct as copy setting internal field reference
+        thermalShellFvPatchScalarField
+        (
+            const thermalShellFvPatchScalarField&,
+            const DimensionedField<scalar, volMesh>&
+        );
+
+        //- Construct and return a clone setting internal field reference
+        virtual tmp<fvPatchScalarField> clone
+        (
+            const DimensionedField<scalar, volMesh>& iF
+        ) const
+        {
+            return tmp<fvPatchScalarField>
+            (
+                new thermalShellFvPatchScalarField(*this, iF)
+            );
+        }
+
+
+    // Member Functions
+
+        //- Update the coefficients associated with the patch field
+        virtual void updateCoeffs();
+
+        //- Write
+        virtual void write(Ostream&) const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace compressible
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+
+#endif
+
+// ************************************************************************* //

src/regionFaModels/derivedFvPatchFields/vibrationShell/vibrationShellFvPatchScalarField.C

@@ -0,0 +1,169 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "vibrationShellFvPatchScalarField.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+vibrationShellFvPatchScalarField::vibrationShellFvPatchScalarField
+(
+    const fvPatch& p,
+    const DimensionedField<scalar, volMesh>& iF
+)
+:
+    mixedFvPatchField<scalar>(p, iF),
+    baffle_(),
+    dict_(dictionary::null)
+{
+    refValue() = 0;
+    refGrad() = 0;
+    valueFraction() = 1;
+}
+
+
+vibrationShellFvPatchScalarField::vibrationShellFvPatchScalarField
+(
+    const vibrationShellFvPatchScalarField& ptf,
+    const fvPatch& p,
+    const DimensionedField<scalar, volMesh>& iF,
+    const fvPatchFieldMapper& mapper
+)
+:
+    mixedFvPatchField<scalar>
+    (
+        ptf,
+        p,
+        iF,
+        mapper
+    ),
+    baffle_(),
+    dict_(ptf.dict_)
+{}
+
+
+vibrationShellFvPatchScalarField::vibrationShellFvPatchScalarField
+(
+    const fvPatch& p,
+    const DimensionedField<scalar, volMesh>& iF,
+    const dictionary& dict
+)
+:
+    mixedFvPatchField<scalar>(p, iF),
+    baffle_(),
+    dict_(dict)
+{
+    fvPatchScalarField::operator=(scalarField("value", dict, p.size()));
+
+    if (dict.found("refValue"))
+    {
+        // Full restart
+        refValue() = scalarField("refValue", dict, p.size());
+        refGrad() = scalarField("refGradient", dict, p.size());
+        valueFraction() = scalarField("valueFraction", dict, p.size());
+    }
+    else
+    {
+        // Start from user entered data. Assume fixedValue.
+        refValue() = *this;
+        refGrad() = 0;
+        valueFraction() = 1;
+    }
+
+    if (!baffle_)
+    {
+        baffle_.reset(regionModels::vibrationShellModel::New(p, dict).ptr());
+    }
+}
+
+
+vibrationShellFvPatchScalarField::vibrationShellFvPatchScalarField
+(
+    const vibrationShellFvPatchScalarField& ptf,
+    const DimensionedField<scalar, volMesh>& iF
+)
+:
+    mixedFvPatchField<scalar>(ptf, iF),
+    baffle_(),
+    dict_(ptf.dict_)
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+void vibrationShellFvPatchScalarField::updateCoeffs()
+{
+    if (this->updated())
+    {
+        return;
+    }
+
+    baffle_->evolve();
+
+    const auto& transportProperties =
+        db().lookupObject<IOdictionary>("transportProperties");
+
+    dimensionedScalar rho("rho", dimDensity, transportProperties);
+
+    const areaScalarField aRho(rho*baffle_->a());
+
+    baffle_->vsm().mapToField(aRho, this->refGrad());
+
+    this->refValue() = Zero;
+    this->valueFraction() = Zero;
+
+    mixedFvPatchField<scalar>::updateCoeffs();
+}
+
+
+void vibrationShellFvPatchScalarField::write(Ostream& os) const
+{
+    mixedFvPatchField<scalar>::write(os);
+
+    dict_.write(os, false);
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+makePatchTypeField
+(
+    fvPatchScalarField,
+    vibrationShellFvPatchScalarField
+);
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+
+// ************************************************************************* //

src/regionFaModels/derivedFvPatchFields/vibrationShell/vibrationShellFvPatchScalarField.H

@@ -0,0 +1,172 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::compressible::vibrationShellFvPatchScalarField
+
+Group
+    grpVibrationBoundaryConditions
+
+Description
+
+Usage
+    Example of the boundary condition specification:
+    \verbatim
+    <masterPatchName>
+    {
+        // Mandatory entries (unmodifiable)
+        type                vibrationShell;
+
+        // Mandatory/Optional (inherited) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property | Description                      | Type  | Reqd | Dflt
+      type     | Type name: vibrationShell        | word  | yes  | -
+    \endtable
+
+    The inherited entries are elaborated in:
+      - \link mixedFvPatchField.H \endlink
+      - \link vibrationShellModel.H \endlink
+
+SourceFiles
+    vibrationShellFvPatchScalarField.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef vibrationShellFvPatchScalarField_H
+#define vibrationShellFvPatchScalarField_H
+
+#include "autoPtr.H"
+#include "vibrationShellModel.H"
+#include "mixedFvPatchFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+             Class vibrationShellFvPatchScalarField Declaration
+\*---------------------------------------------------------------------------*/
+
+class vibrationShellFvPatchScalarField
+:
+    public mixedFvPatchField<scalar>
+{
+    // Private Data
+
+        //- Thermal baffle
+        autoPtr<regionModels::vibrationShellModel> baffle_;
+
+        //- Dictionary
+        mutable dictionary dict_;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("vibrationShell");
+
+
+    // Constructors
+
+        //- Construct from patch and internal field
+        vibrationShellFvPatchScalarField
+        (
+            const fvPatch&,
+            const DimensionedField<scalar, volMesh>&
+        );
+
+        //- Construct from patch, internal field and dictionary
+        vibrationShellFvPatchScalarField
+        (
+            const fvPatch&,
+            const DimensionedField<scalar, volMesh>&,
+            const dictionary&
+        );
+
+        //- Construct by mapping given
+        //- vibrationShellFvPatchScalarField onto a new patch
+        vibrationShellFvPatchScalarField
+        (
+            const vibrationShellFvPatchScalarField&,
+            const fvPatch&,
+            const DimensionedField<scalar, volMesh>&,
+            const fvPatchFieldMapper&
+        );
+
+        //- Construct and return a clone
+        virtual tmp<fvPatchScalarField> clone() const
+        {
+            return tmp<fvPatchScalarField>
+            (
+                new vibrationShellFvPatchScalarField(*this)
+            );
+        }
+
+        //- Construct as copy setting internal field reference
+        vibrationShellFvPatchScalarField
+        (
+            const vibrationShellFvPatchScalarField&,
+            const DimensionedField<scalar, volMesh>&
+        );
+
+        //- Construct and return a clone setting internal field reference
+        virtual tmp<fvPatchScalarField> clone
+        (
+            const DimensionedField<scalar, volMesh>& iF
+        ) const
+        {
+            return tmp<fvPatchScalarField>
+            (
+                new vibrationShellFvPatchScalarField(*this, iF)
+            );
+        }
+
+
+    // Member Functions
+
+        //- Update the coefficients associated with the patch field
+        virtual void updateCoeffs();
+
+        //- Write
+        virtual void write(Ostream&) const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+
+#endif
+
+// ************************************************************************* //

src/regionFaModels/regionFaModel/regionFaModel.C

@@ -0,0 +1,172 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "regionFaModel.H"
+#include "faMesh.H"
+#include "Time.H"
+#include "mappedWallPolyPatch.H"
+#include "zeroGradientFvPatchFields.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+    defineTypeNameAndDebug(regionFaModel, 0);
+}
+}
+
+// * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
+
+void Foam::regionModels::regionFaModel::constructMeshObjects()
+{
+    regionMeshPtr_.reset
+    (
+        new faMesh(primaryMesh_)
+    );
+}
+
+
+void Foam::regionModels::regionFaModel::initialise()
+{
+    if (debug)
+    {
+        Pout<< "regionFaModel::initialise()" << endl;
+    }
+
+    vsmPtr_.reset(new volSurfaceMapping(regionMeshPtr_()));
+}
+
+
+// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
+
+bool Foam::regionModels::regionFaModel::read(const dictionary& dict)
+{
+    if (active_)
+    {
+        if (const dictionary* dictptr = dict.findDict(modelName_ + "Coeffs"))
+        {
+            coeffs_ <<= *dictptr;
+        }
+
+        infoOutput_.readIfPresent("infoOutput", dict);
+
+        return true;
+    }
+
+    return false;
+}
+
+
+// * * * * * * * * * * * * Public Member Functions  * * * * * * * * * * * //
+
+const Foam::volSurfaceMapping& Foam::regionModels::regionFaModel::vsm() const
+{
+    return vsmPtr_();
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::regionModels::regionFaModel::regionFaModel
+(
+    const fvPatch& patch,
+    const word& regionType,
+    const word& modelName,
+    const dictionary& dict,
+    bool readFields
+)
+:
+    primaryMesh_(patch.boundaryMesh().mesh()),
+    patch_(patch),
+    time_(patch.boundaryMesh().mesh().time()),
+    active_(dict.get<Switch>("active")),
+    infoOutput_(false),
+    modelName_(modelName),
+    regionMeshPtr_(nullptr),
+    coeffs_(dict.subOrEmptyDict(modelName + "Coeffs")),
+    vsmPtr_(nullptr),
+    patchID_(patch.index()),
+    regionName_(dict.lookup("region"))
+{
+    if (active_)
+    {
+        constructMeshObjects();
+        initialise();
+
+        if (readFields)
+        {
+            read(dict);
+        }
+    }
+}
+
+
+// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
+
+void Foam::regionModels::regionFaModel::evolve()
+{
+    if (active_)
+    {
+        Info<< "\nEvolving " << modelName_ << " for region "
+            << regionMesh().name() << endl;
+
+        preEvolveRegion();
+
+        evolveRegion();
+
+        postEvolveRegion();
+
+        // Provide some feedback
+        if (infoOutput_)
+        {
+            Info<< incrIndent;
+            info();
+            Info<< endl << decrIndent;
+        }
+    }
+}
+
+
+void Foam::regionModels::regionFaModel::preEvolveRegion()
+{}
+
+
+void Foam::regionModels::regionFaModel::evolveRegion()
+{}
+
+
+void Foam::regionModels::regionFaModel::postEvolveRegion()
+{}
+
+
+void Foam::regionModels::regionFaModel::info()
+{}
+
+
+// ************************************************************************* //

src/regionFaModels/regionFaModel/regionFaModel.H

@@ -0,0 +1,256 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::regionModels::regionFaModel
+
+Description
+    Base class for area region models.
+
+Usage
+    Example of the model specification:
+    \verbatim
+    <patchName>
+    {
+        // Mandatory entries (runtime modifiable)
+        region          <regionName>;
+        active          true;
+
+        // Optional entries (runtime modifiable)
+        infoOutput      false;
+        <model>Coeffs
+        {
+            // subdictionary entries
+        }
+
+        // Mandatory/Optional (derived) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property   | Description                         | Type  | Reqd | Dflt
+      region     | Name of operand region              | word  | yes  | -
+      active     | Flag to activate the model          | bool  | yes  | -
+      infoOutput | Flag to activate information output | bool  | no   | false
+    \endtable
+
+SourceFiles
+    regionFaModelI.H
+    regionFaModel.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef regionFaModel_H
+#define regionFaModel_H
+
+#include "volMesh.H"
+#include "IOdictionary.H"
+#include "Switch.H"
+#include "labelList.H"
+#include "areaFields.H"
+#include "faMesh.H"
+#include "volSurfaceMapping.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+namespace regionModels
+{
+
+/*---------------------------------------------------------------------------*\
+                         Class regionFaModel Declaration
+\*---------------------------------------------------------------------------*/
+
+class regionFaModel
+{
+    // Private Member Functions
+
+        //- Construct region mesh and fields
+        void constructMeshObjects();
+
+        //- Initialise the region
+        void initialise();
+
+
+protected:
+
+    // Protected Data
+
+        //- Reference to the primary mesh database
+        const fvMesh& primaryMesh_;
+
+        //- Reference to fvPatch
+        const fvPatch& patch_;
+
+        //- Reference to the time database
+        const Time& time_;
+
+        //- Active flag
+        Switch active_;
+
+        //- Active information output
+        Switch infoOutput_;
+
+        //- Model name
+        const word modelName_;
+
+        //- Pointer to the region mesh database
+        autoPtr<faMesh> regionMeshPtr_;
+
+        //- Model coefficients dictionary
+        dictionary coeffs_;
+
+        //-Volume-to surface mapping
+        autoPtr<volSurfaceMapping> vsmPtr_;
+
+
+        // Addressing
+
+            //- Patch IDs on the primary region coupled to this region
+            label patchID_;
+
+
+        //- Region name
+        word regionName_;
+
+
+    // Protected Member Functions
+
+        //- Read control parameters from dictionary
+        virtual bool read(const dictionary& dict);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("regionFaModel");
+
+
+    // Constructors
+
+        //- Construct from mesh and name and dict
+        regionFaModel
+        (
+            const fvPatch& patch,
+            const word& regionType,
+            const word& modelName,
+            const dictionary& dict,
+            bool readFields = true
+        );
+
+        //- No copy construct
+        regionFaModel(const regionFaModel&) = delete;
+
+        //- No copy assignment
+        void operator=(const regionFaModel&) = delete;
+
+
+    //- Destructor
+    virtual ~regionFaModel() = default;
+
+
+    // Member Functions
+
+        // Access
+
+            //- Return the reference to the primary mesh database
+            inline const fvMesh& primaryMesh() const;
+
+            //- Return the reference to the time database
+            inline const Time& time() const;
+
+            //- Return the active flag
+            inline const Switch& active() const;
+
+            //- Return the information flag
+            inline const Switch& infoOutput() const;
+
+            //- Return the model name
+            inline const word& modelName() const;
+
+            //- Return the region mesh database
+            inline const faMesh& regionMesh() const;
+
+            //- Return the region mesh database for manipulation
+            inline faMesh& regionMesh();
+
+            //- Return the model coefficients dictionary
+            inline const dictionary& coeffs() const;
+
+            //- Return the solution dictionary
+            inline const dictionary& solution() const;
+
+            //- Return volSurfaceMapping
+            const volSurfaceMapping& vsm() const;
+
+
+        // Addressing
+
+            //- Return the list of patch IDs on the primary region coupled
+            //- to this region
+            inline label patchID();
+
+
+        // Evolution
+
+            //- Main driver routing to evolve the region - calls other evolves
+            virtual void evolve();
+
+            //- Pre-evolve region
+            virtual void preEvolveRegion();
+
+            //- Evolve the region
+            virtual void evolveRegion();
+
+            //- Post-evolve region
+            virtual void postEvolveRegion();
+
+
+        // IO
+
+            //- Provide some feedback
+            virtual void info();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionFaModels
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#include "regionFaModelI.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+
+#endif
+
+// ************************************************************************* //

src/regionFaModels/regionFaModel/regionFaModelI.H

@@ -0,0 +1,118 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "regionFaModel.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+inline const Foam::fvMesh&
+Foam::regionModels::regionFaModel::primaryMesh() const
+{
+    return primaryMesh_;
+}
+
+
+inline const Foam::Time& Foam::regionModels::regionFaModel::time() const
+{
+    return time_;
+}
+
+
+inline const Foam::Switch& Foam::regionModels::regionFaModel::active() const
+{
+    return active_;
+}
+
+
+inline const Foam::Switch& Foam::regionModels::regionFaModel::infoOutput() const
+{
+    return infoOutput_;
+}
+
+
+inline const Foam::word& Foam::regionModels::regionFaModel::modelName() const
+{
+    return modelName_;
+}
+
+
+inline const Foam::faMesh& Foam::regionModels::regionFaModel::regionMesh() const
+{
+    const auto* regionPtr = time_.findObject<faMesh>(regionName_);
+
+    if (regionPtr)
+    {
+        return *regionPtr;
+    }
+    else if (!regionMeshPtr_.valid())
+    {
+        FatalErrorInFunction
+            << "Region mesh not available" << abort(FatalError);
+    }
+
+    return *regionMeshPtr_;
+}
+
+
+inline Foam::faMesh& Foam::regionModels::regionFaModel::regionMesh()
+{
+    auto* regionPtr = time_.getObjectPtr<faMesh>(regionName_);
+
+    if (regionPtr)
+    {
+        return *regionPtr;
+    }
+    else if (!regionMeshPtr_.valid())
+    {
+        FatalErrorInFunction
+            << "Region mesh not available" << abort(FatalError);
+    }
+
+    return *regionMeshPtr_;
+}
+
+
+inline const Foam::dictionary& Foam::regionModels::regionFaModel::coeffs() const
+{
+    return coeffs_;
+}
+
+
+inline const Foam::dictionary&
+Foam::regionModels::regionFaModel::solution() const
+{
+    return regionMesh().solutionDict();
+}
+
+
+inline Foam::label Foam::regionModels::regionFaModel::patchID()
+{
+    return patchID_;
+}
+
+
+// ************************************************************************* //

src/regionFaModels/thermalShell/thermalShell.C

@@ -0,0 +1,232 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "thermalShell.H"
+#include "addToRunTimeSelectionTable.H"
+#include "fvPatchFields.H"
+#include "zeroGradientFaPatchFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+defineTypeNameAndDebug(thermalShell, 0);
+
+addToRunTimeSelectionTable(thermalShellModel, thermalShell, dictionary);
+
+// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
+
+bool thermalShell::read(const dictionary& dict)
+{
+    this->solution().readEntry("nNonOrthCorr", nNonOrthCorr_);
+
+    return true;
+}
+
+
+void thermalShell::solveEnergy()
+{
+    if (debug)
+    {
+        InfoInFunction << endl;
+    }
+
+    const areaScalarField rhoCph(Cp()*rho()*h_);
+
+    faScalarMatrix TEqn
+    (
+        fam::ddt(rhoCph, T_)
+      - fam::laplacian(kappa()*h_, T_)
+     ==
+        qs_
+      //+ q(T_) handled by faOption contactHeatFlux
+      + faOptions()(h_, rhoCph, T_)
+    );
+
+    TEqn.relax();
+
+    faOptions().constrain(TEqn);
+
+    TEqn.solve();
+
+    faOptions().correct(T_);
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+thermalShell::thermalShell
+(
+    const word& modelType,
+    const fvPatch& patch,
+    const dictionary& dict
+)
+:
+    thermalShellModel(modelType, patch, dict),
+    nNonOrthCorr_(1),
+    thermo_(dict.subDict("thermo")),
+    qs_
+    (
+        IOobject
+        (
+            "qs_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::READ_IF_PRESENT,
+            IOobject::NO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(dimPower/dimArea, Zero)
+    ),
+    h_
+    (
+        IOobject
+        (
+            "h_" + regionName_,
+            primaryMesh().time().timeName(),
+            primaryMesh(),
+            IOobject::MUST_READ,
+            IOobject::AUTO_WRITE
+        ),
+        regionMesh()
+    )
+{
+    init();
+}
+
+
+// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
+
+void thermalShell::init()
+{}
+
+
+void thermalShell::preEvolveRegion()
+{}
+
+
+void thermalShell::evolveRegion()
+{
+    nNonOrthCorr_ = solution().get<label>("nNonOrthCorr");
+
+    for (int nonOrth = 0; nonOrth <= nNonOrthCorr_; ++nonOrth)
+    {
+        solveEnergy();
+    }
+
+    Info<< "T min/max   = " << min(T_) << ", " << max(T_) << endl;
+}
+
+
+const tmp<areaScalarField> thermalShell::Cp() const
+{
+    return tmp<areaScalarField>
+    (
+        new areaScalarField
+        (
+            IOobject
+            (
+                "Cps",
+                primaryMesh().time().timeName(),
+                primaryMesh(),
+                IOobject::NO_READ,
+                IOobject::NO_WRITE,
+                false
+            ),
+            regionMesh(),
+            dimensionedScalar(dimEnergy/dimTemperature/dimMass, thermo_.Cp()),
+            zeroGradientFaPatchScalarField::typeName
+        )
+    );
+}
+
+
+const tmp<areaScalarField> thermalShell::rho() const
+{
+    return tmp<areaScalarField>
+    (
+        new areaScalarField
+        (
+            IOobject
+            (
+                "rhos",
+                primaryMesh().time().timeName(),
+                primaryMesh(),
+                IOobject::NO_READ,
+                IOobject::NO_WRITE,
+                false
+            ),
+            regionMesh(),
+            dimensionedScalar(dimDensity, thermo_.rho()),
+            zeroGradientFaPatchScalarField::typeName
+        )
+    );
+}
+
+
+const tmp<areaScalarField> thermalShell::kappa() const
+{
+    return tmp<areaScalarField>
+    (
+        new areaScalarField
+        (
+            IOobject
+            (
+                "kappas",
+                primaryMesh().time().timeName(),
+                primaryMesh(),
+                IOobject::NO_READ,
+                IOobject::NO_WRITE,
+                false
+            ),
+            regionMesh(),
+            dimensionedScalar
+            (
+                dimPower/dimLength/dimTemperature,
+                thermo_.kappa()
+            ),
+            zeroGradientFaPatchScalarField::typeName
+        )
+    );
+}
+
+
+void thermalShell::info()
+{}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// ************************************************************************* //

src/regionFaModels/thermalShell/thermalShell.H

@@ -0,0 +1,208 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::regionFaModels::thermalShell
+
+Description
+    Thermal-shell finite-area model. It solves the energy
+    equation in 2D. The coupling with the 3D region is done through
+    the \c temperatureCoupledBase, plus \c faOption is available to
+    add extra sources on the shell such as \c externalHeatFluxSource etc.
+
+Usage
+    Example of the boundary condition specification:
+    \verbatim
+    <patchName>
+    {
+        // Mandatory/Optional (inherited) entries
+        ...
+
+        // Mandatory entries (unmodifiable)
+        thermalShellModel   thermalShell;
+        thermo
+        {
+            // subdictionary entries
+        }
+
+        // Mandatory/Optional (derived) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property   | Description                      | Type  | Reqd | Dflt
+      thermalShellModel | Type name: thermalShell   | word  | yes  | -
+      thermo     | Solid thermal properties         | dictionary | yes | -
+    \endtable
+
+    The inherited entries are elaborated in:
+      - \link thermalShellModel.H \endlink
+
+See also
+  - Foam::regionModels::thermalShellModels::thermalShellModel
+
+SourceFiles
+    thermalShell.C
+    thermalShellI.H
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef thermalShell_H
+#define thermalShell_H
+
+#include "volFieldsFwd.H"
+#include "thermalShellModel.H"
+#include "solidProperties.H"
+#include "faMesh.H"
+#include "faCFD.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+/*---------------------------------------------------------------------------*\
+                        Class thermalShell Declaration
+\*---------------------------------------------------------------------------*/
+
+class thermalShell
+:
+    public thermalShellModel
+{
+    // Private Member Functions
+
+        //- Initialize thermalShell
+        void init();
+
+
+protected:
+
+    // Protected Data
+
+        // Solution parameters
+
+            //- Number of non orthogonal correctors
+            label nNonOrthCorr_;
+
+
+        // Thermo properties
+
+            //- Solid properties
+            solidProperties thermo_;
+
+
+        // Source term fields
+
+            //- External surface energy source  / [J/m2/s]
+            areaScalarField qs_;
+
+            //- Thickness
+            areaScalarField h_;
+
+
+    // Protected Member Functions
+
+        //- Read control parameters from dictionary
+        virtual bool read(const dictionary& dict);
+
+
+        // Equations
+
+            //- Solve energy equation
+            void solveEnergy();
+
+
+public:
+
+    //- Runtime type information
+    TypeName("thermalShell");
+
+
+    // Constructors
+
+        //- Construct from components and dict
+        thermalShell
+        (
+            const word& modelType,
+            const fvPatch& patch,
+            const dictionary& dict
+        );
+
+        //- No copy construct
+        thermalShell(const thermalShell&) = delete;
+
+        //- No copy assignment
+        void operator=(const thermalShell&) = delete;
+
+
+    //- Destructor
+    virtual ~thermalShell() = default;
+
+
+    // Member Functions
+
+        // Fields
+
+            //- Return the film specific heat capacity [J/kg/K]
+            const tmp<areaScalarField> Cp() const;
+
+            //- Return density [Kg/m3]
+            const tmp<areaScalarField> rho() const;
+
+            //- Return thermal conductivity [W/m/K]
+            const tmp<areaScalarField> kappa() const;
+
+
+        // Evolution
+
+            //- Pre-evolve  thermal baffle
+            virtual void preEvolveRegion();
+
+            //- Evolve the thermal baffle
+            virtual void evolveRegion();
+
+
+       // IO
+
+            //- Provide some feedback
+            virtual void info();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+
+#endif
+
+// ************************************************************************* //

src/regionFaModels/thermalShellModel/thermalShellModel.C

@@ -0,0 +1,121 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "thermalShellModel.H"
+#include "faMesh.H"
+#include "fvMesh.H"
+#include "fvPatchFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+defineTypeNameAndDebug(thermalShellModel, 0);
+
+defineRunTimeSelectionTable(thermalShellModel, dictionary);
+
+// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
+
+bool thermalShellModel::read(const dictionary& dict)
+{
+    if (regionFaModel::read(dict))
+    {
+        return true;
+    }
+
+    return false;
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+thermalShellModel::thermalShellModel
+(
+    const word& modelType,
+    const fvPatch& p,
+    const dictionary& dict
+)
+:
+    regionFaModel(p, "thermalShell", modelType, dict, true),
+    TName_(dict.get<word>("T")),
+    Tp_(p.boundaryMesh().mesh().lookupObject<volScalarField>(TName_)),
+    T_
+    (
+        IOobject
+        (
+            "Ts_" + regionName_,
+            p.boundaryMesh().mesh().time().timeName(),
+            p.boundaryMesh().mesh(),
+            IOobject::MUST_READ,
+            IOobject::AUTO_WRITE
+        ),
+        regionMesh()
+    ),
+    faOptions_(Foam::fa::options::New(p))
+{
+    if (!faOptions_.optionList::size())
+    {
+        Info << "No finite area options present" << endl;
+    }
+}
+
+
+// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
+
+void thermalShellModel::preEvolveRegion()
+{}
+
+
+const Foam::volScalarField& thermalShellModel::Tp() const
+{
+    return Tp_;
+}
+
+
+const Foam::areaScalarField& thermalShellModel::T() const
+{
+    return T_;
+}
+
+
+Foam::fa::options& thermalShellModel::faOptions()
+{
+     return faOptions_;
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// ************************************************************************* //

src/regionFaModels/thermalShellModel/thermalShellModel.H

@@ -0,0 +1,205 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::regionModels::thermalShellModels::thermalShellModel
+
+Description
+    Intermediate class for thermal-shell finite-area models.
+
+Usage
+    Example of the boundary condition specification:
+    \verbatim
+    <patchName>
+    {
+        // Mandatory/Optional (inherited) entries
+        ...
+
+        // Mandatory entries (unmodifiable)
+        T                     <Tname>;
+
+        // Optional entries (unmodifiable)
+        thermalShellModel     <thermalShellModelName>;
+
+        // Mandatory/Optional (derived) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property   | Description                       | Type  | Reqd | Dflt
+      T          | Name of operand temperature field | word  | yes  | -
+      thermalShellModel | Name of thermal-shell model <!--
+                        -->                      | word | no | thermalShell
+    \endtable
+
+    The inherited entries are elaborated in:
+      - \link regionFaModel.H \endlink
+
+SourceFiles
+    thermalShellModel.C
+    thermalShellModelNew.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef thermalShellModel_H
+#define thermalShellModel_H
+
+#include "runTimeSelectionTables.H"
+#include "autoPtr.H"
+#include "areaFieldsFwd.H"
+#include "volFieldsFwd.H"
+#include "regionFaModel.H"
+#include "faOptions.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+/*---------------------------------------------------------------------------*\
+                      Class thermalShellModel Declaration
+\*---------------------------------------------------------------------------*/
+
+class thermalShellModel
+:
+    public regionFaModel
+{
+    // Private Member Functions
+
+        //- Initialize thermal Baffle
+        void init();
+
+
+protected:
+
+    // Protected Data
+
+        //- Name of the temperature field
+        word TName_;
+
+        //- Primary region temperature
+        const volScalarField& Tp_;
+
+        //- Shell temperature
+        areaScalarField T_;
+
+        //- Pointer to faOptions
+        Foam::fa::options& faOptions_;
+
+
+    // Protected Member Functions
+
+        //- Read control parameters from dictionary
+        virtual bool read(const dictionary&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("thermalShellModel");
+
+
+    // Declare runtime constructor selection tables
+
+         declareRunTimeSelectionTable
+         (
+             autoPtr,
+             thermalShellModel,
+             dictionary,
+             (
+                const word& modelType,
+                const fvPatch& patch,
+                const dictionary& dict
+             ),
+             (modelType, patch, dict)
+         );
+
+
+    // Constructors
+
+        //- Construct from type name and mesh and dict
+        thermalShellModel
+        (
+            const word& modelType,
+            const fvPatch& patch,
+            const dictionary& dict
+        );
+
+        //- No copy construct
+        thermalShellModel(const thermalShellModel&) = delete;
+
+        //- No copy assignment
+        void operator=(const thermalShellModel&) = delete;
+
+
+    // Selectors
+
+        //- Return a reference to the selected model using dictionary
+        static autoPtr<thermalShellModel> New
+        (
+            const fvPatch& patch,
+            const dictionary& dict
+        );
+
+
+    //- Destructor
+    virtual ~thermalShellModel() = default;
+
+
+    // Member Functions
+
+        // Access
+
+            //- Return primary region temperature
+            const volScalarField& Tp() const;
+
+            //- Return shell temperature
+            const areaScalarField& T() const;
+
+            //- Return faOptions
+            Foam::fa::options& faOptions();
+
+
+        // Evolution
+
+            //- Pre-evolve region
+            virtual void preEvolveRegion();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/regionFaModels/thermalShellModel/thermalShellModelNew.C

@@ -0,0 +1,69 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "thermalShellModel.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+// * * * * * * * * * * * * * * * * Selectors * * * * * * * * * * * * * * * * //
+
+autoPtr<thermalShellModel> thermalShellModel::New
+(
+    const fvPatch& p,
+    const dictionary& dict
+)
+{
+    const word modelType =
+        dict.getOrDefault<word>("thermalShellModel", "thermalShell");
+
+    auto cstrIter = dictionaryConstructorTablePtr_->cfind(modelType);
+
+    if (!cstrIter.found())
+    {
+        FatalErrorInFunction
+            << "Unknown thermalShellModel type "
+            << modelType << nl << nl
+            << "Valid thermalShellModel types :" << nl
+            << dictionaryConstructorTablePtr_->sortedToc()
+            << exit(FatalError);
+    }
+
+    return autoPtr<thermalShellModel>(cstrIter()(modelType, p, dict));
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// ************************************************************************* //

src/regionFaModels/vibrationShellModel/vibrationShellModel.C

@@ -0,0 +1,148 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "vibrationShellModel.H"
+#include "faMesh.H"
+#include "fvMesh.H"
+#include "fvPatchFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+defineTypeNameAndDebug(vibrationShellModel, 0);
+
+defineRunTimeSelectionTable(vibrationShellModel, dictionary);
+
+
+// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
+
+bool vibrationShellModel::read(const dictionary& dict)
+{
+    if (regionFaModel::read(dict))
+    {
+        return true;
+    }
+
+    return false;
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+vibrationShellModel::vibrationShellModel
+(
+    const word& modelType,
+    const fvPatch& p,
+    const dictionary& dict
+)
+:
+    regionFaModel(p, "vibratingShell", modelType, dict, true),
+    pName_(dict.get<word>("p")),
+    pa_(p.boundaryMesh().mesh().lookupObject<volScalarField>(pName_)),
+    w_
+    (
+        IOobject
+        (
+            "ws_" + regionName_,
+            p.boundaryMesh().mesh().time().timeName(),
+            p.boundaryMesh().mesh(),
+            IOobject::MUST_READ,
+            IOobject::AUTO_WRITE
+        ),
+        regionMesh()
+    ),
+    a_
+    (
+        IOobject
+        (
+            "as_" + regionName_,
+            p.boundaryMesh().mesh().time().timeName(),
+            p.boundaryMesh().mesh(),
+            IOobject::NO_READ,
+            IOobject::AUTO_WRITE
+        ),
+        regionMesh(),
+        dimensionedScalar(dimAcceleration, Zero)
+    ),
+    faOptions_(Foam::fa::options::New(p)),
+    solid_(dict.subDict("solid"))
+{
+    if (!faOptions_.optionList::size())
+    {
+        Info << "No finite area options present" << endl;
+    }
+}
+
+
+// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
+
+void vibrationShellModel::preEvolveRegion()
+{}
+
+
+const Foam::volScalarField& vibrationShellModel::pa() const
+{
+    return pa_;
+}
+
+
+const Foam::areaScalarField& vibrationShellModel::w() const
+{
+    return w_;
+}
+
+
+const Foam::areaScalarField& vibrationShellModel::a() const
+{
+    return a_;
+}
+
+
+Foam::fa::options& vibrationShellModel::faOptions()
+{
+     return faOptions_;
+}
+
+
+const Foam::solidProperties& vibrationShellModel::solid() const
+{
+     return solid_;
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// ************************************************************************* //

src/regionFaModels/vibrationShellModel/vibrationShellModel.H

@@ -0,0 +1,218 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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::regionModels::thermalShellModels::vibrationShellModel
+
+Description
+    Intermediate class for vibration-shell finite-area models.
+
+Usage
+    Example of the boundary condition specification:
+    \verbatim
+    <patchName>
+    {
+        // Mandatory/Optional (inherited) entries
+        ...
+
+        // Mandatory entries (unmodifiable)
+        vibrationShellModel     <thermalShellModelName>;
+        p                       <pName>;
+
+        solid
+        {
+            // subdictionary entries
+        }
+
+        // Mandatory/Optional (derived) entries
+        ...
+    }
+    \endverbatim
+
+    where the entries mean:
+    \table
+      Property   | Description                            | Type  | Reqd | Dflt
+      vibrationShellModel | Name of vibration-shell model | word | yes | -
+      p          | Name of the coupled field in the primary <!--
+                 --> region                               | word | yes | -
+      solid      | Solid properties                 | dictionary | yes | -
+    \endtable
+
+    The inherited entries are elaborated in:
+      - \link regionFaModel.H \endlink
+
+SourceFiles
+    vibrationShellModel.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef thermalShellModel_H
+#define thermalShellModel_H
+
+#include "runTimeSelectionTables.H"
+#include "autoPtr.H"
+#include "areaFieldsFwd.H"
+#include "volFieldsFwd.H"
+#include "regionFaModel.H"
+#include "faOptions.H"
+#include "solidProperties.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+/*---------------------------------------------------------------------------*\
+                      Class vibrationShellModel Declaration
+\*---------------------------------------------------------------------------*/
+
+class vibrationShellModel
+:
+    public regionFaModel
+{
+    // Private Member Functions
+
+        //- No copy construct
+        vibrationShellModel(const vibrationShellModel&) = delete;
+
+        //- No copy assignment
+        void operator=(const vibrationShellModel&) = delete;
+
+
+protected:
+
+    // Protected Data
+
+        //- Name of the coupled field in the primary region
+        word pName_;
+
+        //- Primary region acoustic pressure
+        const volScalarField& pa_;
+
+        //- Shell displacement
+        areaScalarField w_;
+
+        //- Shell acceleration
+        areaScalarField a_;
+
+        //- Pointer to faOptions
+        Foam::fa::options& faOptions_;
+
+        //- Solid properties
+        solidProperties solid_;
+
+
+    // Protected Member Functions
+
+        //- Read control parameters from dictionary
+        virtual bool read(const dictionary&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("vibrationShellModel");
+
+
+    // Declare runtime constructor selection tables
+
+         declareRunTimeSelectionTable
+         (
+             autoPtr,
+             vibrationShellModel,
+             dictionary,
+             (
+                const word& modelType,
+                const fvPatch& patch,
+                const dictionary& dict
+             ),
+             (modelType, patch, dict)
+         );
+
+
+    // Constructors
+
+        //- Construct from type name and mesh and dict
+        vibrationShellModel
+        (
+            const word& modelType,
+            const fvPatch& patch,
+            const dictionary& dict
+        );
+
+
+    // Selectors
+
+        //- Return a reference to the selected model using dictionary
+        static autoPtr<vibrationShellModel> New
+        (
+            const fvPatch& patch,
+            const dictionary& dict
+        );
+
+
+    //- Destructor
+    virtual ~vibrationShellModel() = default;
+
+
+    // Member Functions
+
+        // Access
+
+            //- Return primary region pa
+            const volScalarField& pa() const;
+
+            //- Return shell displacement
+            const areaScalarField& w() const;
+
+            //- Return shell acceleration
+            const areaScalarField& a() const;
+
+            //- Return faOptions
+            Foam::fa::options& faOptions();
+
+            //- Return solid properties
+            const solidProperties& solid() const;
+
+
+        // Evolution
+
+            //- Pre-evolve region
+            virtual void preEvolveRegion();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/regionFaModels/vibrationShellModel/vibrationShellModelNew.C

@@ -0,0 +1,68 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019-2020 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+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 "vibrationShellModel.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace regionModels
+{
+
+// * * * * * * * * * * * * * * * * Selectors * * * * * * * * * * * * * * * * //
+
+autoPtr<vibrationShellModel> vibrationShellModel::New
+(
+    const fvPatch& p,
+    const dictionary& dict
+)
+{
+    const word modelType = dict.get<word>("vibrationShellModel");
+
+    auto cstrIter = dictionaryConstructorTablePtr_->cfind(modelType);
+
+    if (!cstrIter.found())
+    {
+        FatalErrorInFunction
+            << "Unknown vibrationShellModel type "
+            << modelType << nl << nl
+            << "Valid vibrationShellModel types :" << nl
+            << dictionaryConstructorTablePtr_->sortedToc()
+            << exit(FatalError);
+    }
+
+    return autoPtr<vibrationShellModel>(cstrIter()(modelType, p, dict));
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace regionModels
+} // End namespace Foam
+
+// ************************************************************************* //

src/surfMesh/writers/boundaryData/boundaryDataSurfaceWriter.H

@@ -159,6 +159,9 @@ class boundaryDataWriter
 
     // Private Member Functions
 
+        //- Write option (default: IOstream::ASCII)
+        IOstream::streamFormat writeFormat_;
+
         //- Templated write field operation
         template<class Type>
         fileName writeTemplate

src/thermophysicalModels/thermophysicalProperties/solidProperties/C/C.C

@@ -42,7 +42,7 @@ namespace Foam
 
 Foam::C::C()
 :
-    solidProperties(2010, 710, 0.04, 0.0, 1.0, 12.011)
+    solidProperties(2010, 710, 0.04, 0.0, 1.0, 12.011, 0.0, 0.0)
 {
     if (debug)
     {

src/thermophysicalModels/thermophysicalProperties/solidProperties/CaCO3/CaCO3.C

@@ -42,7 +42,7 @@ namespace Foam
 
 Foam::CaCO3::CaCO3()
 :
-    solidProperties(2710, 850, 1.3, 0.0, 1.0, 100.086)
+    solidProperties(2710, 850, 1.3, 0.0, 1.0, 100.086, 0.0, 0.0)
 {
     if (debug)
     {

src/thermophysicalModels/thermophysicalProperties/solidProperties/ash/ash.C

@@ -42,7 +42,7 @@ namespace Foam
 
 Foam::ash::ash()
 :
-    solidProperties(2010, 710, 0.04, 0.0, 1.0, 12.011)
+    solidProperties(2010, 710, 0.04, 0.0, 1.0, 12.011, 0.0, 0.0)
 {
     if (debug)
     {

src/thermophysicalModels/thermophysicalProperties/solidProperties/solidProperties/solidProperties.C

@@ -47,7 +47,9 @@ Foam::solidProperties::solidProperties
     scalar kappa,
     scalar Hf,
     scalar emissivity,
-    scalar W
+    scalar W,
+    scalar nu,
+    scalar E
 )
 :
     rho_(rho),
@@ -55,7 +57,9 @@ Foam::solidProperties::solidProperties
     kappa_(kappa),
     Hf_(Hf),
     emissivity_(emissivity),
-    W_(W)
+    W_(W),
+    nu_(nu),
+    E_(E)
 {}
 
 
@@ -66,7 +70,9 @@ Foam::solidProperties::solidProperties(const dictionary& dict)
     kappa_(dict.getCompat<scalar>("kappa", {{"K", 1612}})),
     Hf_(dict.get<scalar>("Hf")),
     emissivity_(dict.get<scalar>("emissivity")),
-    W_(dict.get<scalar>("W"))
+    W_(dict.get<scalar>("W")),
+    nu_(dict.getOrDefault<scalar>("nu", 0.0)),
+    E_(dict.getOrDefault<scalar>("E", 0.0))
 {}
 
 
@@ -80,6 +86,8 @@ void Foam::solidProperties::readIfPresent(const dictionary& dict)
     dict.readIfPresent("Hf", Hf_);
     dict.readIfPresent("emissivity", emissivity_);
     dict.readIfPresent("W", W_);
+    dict.readIfPresent("nu", nu_);
+    dict.readIfPresent("E", E_);
 }
 
 
@@ -90,7 +98,9 @@ void Foam::solidProperties::writeData(Ostream& os) const
         << kappa_ << token::SPACE
         << Hf_ << token::SPACE
         << emissivity_ << token::SPACE
-        << W_;
+        << W_ << token::SPACE
+        << nu_ << token::SPACE
+        << E_;
 }
 
 

src/thermophysicalModels/thermophysicalProperties/solidProperties/solidProperties/solidProperties.H

@@ -74,6 +74,12 @@ class solidProperties
         //- Molar weight [Kg/Kmol]
         scalar W_;
 
+        //- Poisson ration
+        scalar nu_;
+
+        //- Young Modulus [N/m2]
+        scalar E_;
+
 
 public:
 
@@ -112,7 +118,9 @@ public:
             scalar kappa,
             scalar Hf,
             scalar emissivity,
-            scalar W
+            scalar W,
+            scalar nu,
+            scalar E
         );
 
         //- Construct from dictionary
@@ -163,6 +171,12 @@ public:
             //- Molar weight [Kg/Kmol]
             inline scalar W() const;
 
+            //- Poissons
+            inline scalar nu() const;
+
+            //- Young modulus [N/m2]
+            inline scalar E() const;
+
 
     // I-O
 

src/thermophysicalModels/thermophysicalProperties/solidProperties/solidProperties/solidPropertiesI.H

@@ -65,10 +65,23 @@ inline Foam::scalar Foam::solidProperties::emissivity() const
     return emissivity_;
 }
 
+
 inline Foam::scalar Foam::solidProperties::W() const
 {
     return W_;
 }
 
 
+inline Foam::scalar Foam::solidProperties::nu() const
+{
+    return nu_;
+}
+
+
+inline Foam::scalar Foam::solidProperties::E() const
+{
+    return E_;
+}
+
+
 // ************************************************************************* //

tutorials/compressible/acousticFoam/obliqueAirJet/Allclean

@@ -0,0 +1,10 @@
+#!/bin/sh
+cd "${0%/*}" || exit                                # Run from this directory
+. ${WM_PROJECT_DIR:?}/bin/tools/CleanFunctions      # Tutorial clean functions
+#------------------------------------------------------------------------------
+
+(cd precursor && ./Allclean)
+
+(cd main && ./Allclean)
+
+# -----------------------------------------------------------------------------

tutorials/compressible/acousticFoam/obliqueAirJet/Allrun-parallel

@@ -0,0 +1,13 @@
+#!/bin/sh
+cd "${0%/*}" || exit                                # Run from this directory
+. ${WM_PROJECT_DIR:?}/bin/tools/RunFunctions        # Tutorial run functions
+#------------------------------------------------------------------------------
+
+# Run a precursor init case
+(cd main && ./Allrun.pre)
+(cd precursor && ./Allrun-parallel)
+
+# Run the main case
+(cd main && ./Allrun-parallel)
+
+# -----------------------------------------------------------------------------

tutorials/compressible/acousticFoam/obliqueAirJet/main/0.orig/h_vibrationShell

@@ -0,0 +1,30 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2011                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       areaScalarField;
+    object      h_ceilingShell;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 1 0 0 0 0 0];
+
+internalField   uniform 0.00485;
+
+boundaryField
+{
+    ".*"
+    {
+        type    zeroGradient;
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

tutorials/compressible/acousticFoam/obliqueAirJet/main/0.orig/pa

@@ -0,0 +1,67 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2011                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volScalarField;
+    object      pa;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [1 -1 -2 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    box
+    {
+        type            acousticWaveTransmissive;
+        advectiveSpeed  340;
+        value           $internalField;
+    }
+
+    window
+    {
+        type                vibrationShell;
+        active              true;
+        p                   pa;
+
+        solid
+        {
+            W                   20; //Not used
+            rho                 2500;
+
+            kappa               200;
+            Cp                  600;
+            Hf                  0;
+            emissivity          0;
+
+            E                   7e10;
+            nu                  0.22;
+        }
+
+        region                vibrationShell;
+        vibrationShellModel   KirchhoffShell;
+
+        f0             0.04;
+        f1             0;
+        f2             0;
+
+        value          $internalField;
+   }
+
+    wall
+    {
+        type            zeroGradient;
+    }
+}
+
+
+// ************************************************************************* //

tutorials/compressible/acousticFoam/obliqueAirJet/main/0.orig/ps_vibrationShell

@@ -0,0 +1,30 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2011                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       areaScalarField;
+    object      ps;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [1 -1 -2 0 0 0 0];
+
+internalField   uniform 0;
+
+boundaryField
+{
+    ".*"
+    {
+        type    zeroGradient;
+    }
+}
+
+
+// ************************************************************************* //

tutorials/compressible/acousticFoam/obliqueAirJet/main/0.orig/ws_vibrationShell

@@ -0,0 +1,31 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2011                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       areaScalarField;
+    object      wS;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions     [0 1 0 0 0 0 0];
+
+internalField      uniform 0.0;
+
+boundaryField
+{
+    sealing
+    {
+        type       clampedPlate;
+        value      $internalField;
+    }
+}
+
+
+// ************************************************************************* //

tutorials/compressible/acousticFoam/obliqueAirJet/main/Allclean

@@ -0,0 +1,12 @@
+#!/bin/sh
+cd "${0%/*}" || exit                                # Run from this directory
+. ${WM_PROJECT_DIR:?}/bin/tools/CleanFunctions      # Tutorial clean functions
+#------------------------------------------------------------------------------
+
+cleanCase0
+
+rm -rf constant/boundaryData
+rm -f constant/faMesh/faceLabels
+rm -f constant/faMesh/faBoundary
+
+# -----------------------------------------------------------------------------

tutorials/compressible/acousticFoam/obliqueAirJet/main/Allrun-parallel

@@ -0,0 +1,14 @@
+#!/bin/sh
+cd "${0%/*}" || exit                                # Run from this directory
+. ${WM_PROJECT_DIR:?}/bin/tools/RunFunctions        # Tutorial run functions
+#------------------------------------------------------------------------------
+
+restore0Dir
+
+runApplication decomposePar -force
+
+runParallel $(getApplication)
+
+runApplication reconstructPar
+
+#------------------------------------------------------------------------------

tutorials/compressible/acousticFoam/obliqueAirJet/main/Allrun.pre

@@ -0,0 +1,12 @@
+#!/bin/sh
+cd "${0%/*}" || exit                                # Run from this directory
+. ${WM_PROJECT_DIR:?}/bin/tools/RunFunctions        # Tutorial run functions
+#------------------------------------------------------------------------------
+
+runApplication blockMesh
+
+runApplication snappyHexMesh -overwrite
+
+runApplication makeFaMesh
+
+#------------------------------------------------------------------------------

tutorials/compressible/acousticFoam/obliqueAirJet/main/constant/faMesh/faMeshDefinition

@@ -0,0 +1,30 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2011                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      faMeshDefinition;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+polyMeshPatches  1(window);
+
+boundary
+{
+    sealing
+    {
+        type                patch;
+        ownerPolyPatch      window;
+        neighbourPolyPatch  fixedWall;
+    }
+}
+
+
+// ************************************************************************** //