Merge branch 'feature-polyhedral-amr' into 'develop'

Draft: ENH: Polyhedral AMR

See merge request Development/openfoam!667

applications/solvers/basic/scalarTransportFoam/Make/options

@@ -1,10 +1,15 @@
 EXE_INC = \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
     -I$(LIB_SRC)/meshTools/lnInclude \
-    -I$(LIB_SRC)/sampling/lnInclude
+    -I$(LIB_SRC)/sampling/lnInclude \
+    -I$(LIB_SRC)/dynamicMesh/lnInclude \
+    -I$(LIB_SRC)/dynamicFvMesh/lnInclude
 
 EXE_LIBS = \
     -lfiniteVolume \
     -lfvOptions \
     -lmeshTools \
+    -ldynamicMesh \
+    -ldynamicFvMesh \
+    -ltopoChangerFvMesh \
     -lsampling

applications/solvers/basic/scalarTransportFoam/scalarTransportFoam.C

@@ -56,6 +56,7 @@ Description
 \*---------------------------------------------------------------------------*/
 
 #include "fvCFD.H"
+#include "dynamicFvMesh.H"
 #include "fvOptions.H"
 #include "simpleControl.H"
 
@@ -71,7 +72,7 @@ int main(int argc, char *argv[])
     #include "addCheckCaseOptions.H"
     #include "setRootCaseLists.H"
     #include "createTime.H"
-    #include "createMesh.H"
+    #include "createDynamicFvMesh.H"
 
     simpleControl simple(mesh);
 
@@ -87,6 +88,16 @@ int main(int argc, char *argv[])
     {
         Info<< "Time = " << runTime.timeName() << nl << endl;
 
+        // Do any mesh changes
+        mesh.controlledUpdate();
+
+        if (mesh.changing())
+        {
+            // Calculate absolute flux
+            // from the mapped surface velocity
+            phi = mesh.Sf() & fvc::interpolate(U);
+        }
+
         while (simple.correctNonOrthogonal())
         {
             fvScalarMatrix TEqn

applications/utilities/mesh/generation/extrude/extrudeMesh/extrudeMesh.C

@@ -43,6 +43,7 @@ Description
 #include "argList.H"
 #include "Time.H"
 #include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "polyTopoChanger.H"
 #include "edgeCollapser.H"
 #include "perfectInterface.H"
@@ -1050,7 +1051,8 @@ int main(int argc, char *argv[])
         );
 
         // Topo change container
-        polyTopoChange meshMod(mesh);
+        //polyTopoChange meshMod(mesh);
+        batchPolyTopoChange meshMod(mesh);
 
         perfectStitcher.setRefinement
         (
@@ -1076,7 +1078,9 @@ int main(int argc, char *argv[])
         );
 
         // Construct new mesh from polyTopoChange.
-        autoPtr<mapPolyMesh> map = meshMod.changeMesh(mesh, false);
+        //autoPtr<mapPolyMesh> map = meshMod.changeMesh(mesh, false);
+        polyTopoChanger XXX (mesh, IOobject::NO_READ);
+        autoPtr<mapPolyMesh> map = XXX.changeMesh(mesh, meshMod);
 
         // Update fields
         mesh.updateMesh(map());

applications/utilities/mesh/manipulation/stitchMesh/stitchMesh.C

@@ -621,7 +621,7 @@ int main(int argc, char *argv[])
         }
 
         // Execute all polyMeshModifiers
-        autoPtr<mapPolyMesh> morphMap = stitcher.changeMesh(true);
+        autoPtr<mapPolyMesh> morphMap = stitcher.changeMesh();
 
         mesh.movePoints(morphMap->preMotionPoints());
 

src/Allwmake

@@ -79,7 +79,7 @@ renumber/Allwmake $targetType $*
 parallel/Allwmake $targetType $*
 
 wmake $targetType dynamicFvMesh
-wmake $targetType topoChangerFvMesh
+#HJ wmake $targetType topoChangerFvMesh
 
 wmake $targetType sampling
 transportModels/Allwmake $targetType $*
@@ -133,6 +133,9 @@ wmake $targetType rigidBodyMeshMotion
 wmake $targetType atmosphericModels
 wmake $targetType optimisation/adjointOptimisation/adjoint
 
+# Moved by HJ
+wmake $targetType topoChangerFvMesh
+
 
 # interfaceTracking libs
 dynamicFaMesh/Allwmake $targetType $*

src/dynamicMesh/Make/files

@@ -22,6 +22,7 @@ $(polyMeshModifier)/polyMeshModifier.C
 $(polyMeshModifier)/polyMeshModifierNew.C
 
 polyTopoChange/polyTopoChanger/polyTopoChanger.C
+polyTopoChange/polyTopoChanger/polyTopoChangerChangeMesh.C
 polyTopoChange/polyTopoChange/addPatchCellLayer.C
 polyTopoChange/polyTopoChange/pointEdgeCollapse/pointEdgeCollapse.C
 polyTopoChange/polyTopoChange/edgeCollapser.C
@@ -76,6 +77,10 @@ meshCut/refineCell/refineCell.C
 meshCut/wallLayerCells/wallLayerCells.C
 meshCut/wallLayerCells/wallNormalInfo/wallNormalInfo.C
 
+refinement/refinement/refinement.C
+refinement/polyhedralRefinement/polyhedralRefinement.C
+refinement/prismatic2DRefinement/prismatic2DRefinement.C
+
 polyTopoChange/attachPolyTopoChanger/attachPolyTopoChanger.C
 polyTopoChange/repatchPolyTopoChanger/repatchPolyTopoChanger.C
 

src/dynamicMesh/attachDetach/attachDetach.C

@@ -31,7 +31,7 @@ License
 #include "polyMesh.H"
 #include "Time.H"
 #include "primitiveMesh.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "addToRunTimeSelectionTable.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
@@ -365,7 +365,7 @@ bool Foam::attachDetach::changeTopology() const
 }
 
 
-void Foam::attachDetach::setRefinement(polyTopoChange& ref) const
+void Foam::attachDetach::setRefinement(batchPolyTopoChange& ref) const
 {
     // Insert the attach/detach instructions into the topological change
 

src/dynamicMesh/attachDetach/attachDetach.H

@@ -122,10 +122,10 @@ class attachDetach
         // Topological changes
 
             //- Attach interface
-            void attachInterface(polyTopoChange&) const;
+            void attachInterface(batchPolyTopoChange&) const;
 
             //- Detach interface
-            void detachInterface(polyTopoChange&) const;
+            void detachInterface(batchPolyTopoChange&) const;
 
             //- Calculate point match addressing
             void calcPointMatchMap() const;
@@ -215,7 +215,7 @@ public:
 
         //- Insert the layer addition/removal instructions
         //  into the topological change
-        virtual void setRefinement(polyTopoChange&) const;
+        virtual void setRefinement(batchPolyTopoChange&) const;
 
         //- Modify motion points to comply with the topological change
         virtual void modifyMotionPoints(pointField& motionPoints) const;

src/dynamicMesh/attachDetach/attachInterface.C

@@ -29,7 +29,7 @@ License
 #include "attachDetach.H"
 #include "polyMesh.H"
 #include "primitiveMesh.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "polyTopoChanger.H"
 #include "polyRemovePoint.H"
 #include "polyRemoveFace.H"
@@ -43,7 +43,7 @@ const Foam::scalar Foam::attachDetach::positionDifference_ = 1e-8;
 
 void Foam::attachDetach::attachInterface
 (
-    polyTopoChange& ref
+    batchPolyTopoChange& ref
 ) const
 {
     // Algorithm:
@@ -62,7 +62,7 @@ void Foam::attachDetach::attachInterface
     if (debug)
     {
         Pout<< "void attachDetach::attachInterface("
-            << "polyTopoChange& ref) const "
+            << "batchPolyTopoChange& ref) const "
             << " for object " << name() << " : "
             << "Attaching interface" << endl;
     }
@@ -266,7 +266,7 @@ void Foam::attachDetach::attachInterface
     if (debug)
     {
         Pout<< "void attachDetach::attachInterface("
-            << "polyTopoChange& ref) const "
+            << "batchPolyTopoChange& ref) const "
             << " for object " << name() << " : "
             << "Finished attaching interface" << endl;
     }

src/dynamicMesh/attachDetach/detachInterface.C

@@ -28,7 +28,7 @@ License
 #include "attachDetach.H"
 #include "polyMesh.H"
 #include "primitiveMesh.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "polyTopoChanger.H"
 #include "polyAddPoint.H"
 #include "polyModifyFace.H"
@@ -38,7 +38,7 @@ License
 
 void Foam::attachDetach::detachInterface
 (
-    polyTopoChange& ref
+    batchPolyTopoChange& ref
 ) const
 {
     // Algorithm:
@@ -66,7 +66,7 @@ void Foam::attachDetach::detachInterface
     if (debug)
     {
         Pout<< "void attachDetach::detachInterface("
-            << "polyTopoChange& ref) const "
+            << "batchPolyTopoChange& ref) const "
             << " for object " << name() << " : "
             << "Detaching interface" << endl;
     }
@@ -75,7 +75,7 @@ void Foam::attachDetach::detachInterface
     const faceZoneMesh& zoneMesh = mesh.faceZones();
 
     // Check that zone is in increasing order (needed since adding faces
-    // in same order - otherwise polyTopoChange face ordering will mess up
+    // in same order - otherwise batchPolyTopoChange face ordering will mess up
     // correspondence)
     if (debug)
     {
@@ -459,7 +459,7 @@ void Foam::attachDetach::detachInterface
     if (debug)
     {
         Pout<< "void attachDetach::detachInterface("
-            << "polyTopoChange& ref) const "
+            << "batchPolyTopoChange& ref) const "
             << " for object " << name() << " : "
             << "Finished detaching interface" << endl;
     }

src/dynamicMesh/layerAdditionRemoval/addCellLayer.C

@@ -29,7 +29,7 @@ License
 #include "layerAdditionRemoval.H"
 #include "polyMesh.H"
 #include "primitiveMesh.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "polyTopoChanger.H"
 #include "polyAddPoint.H"
 #include "polyAddCell.H"
@@ -88,7 +88,7 @@ Foam::tmp<Foam::vectorField> Foam::layerAdditionRemoval::extrusionDir() const
 
 void Foam::layerAdditionRemoval::addCellLayer
 (
-    polyTopoChange& ref
+    batchPolyTopoChange& ref
 ) const
 {
     // Insert the layer addition instructions into the topological change
@@ -108,7 +108,7 @@ void Foam::layerAdditionRemoval::addCellLayer
     if (debug)
     {
         Pout<< "void layerAdditionRemoval::addCellLayer("
-            << "polyTopoChange& ref) const for object " << name() << " : "
+            << "batchPolyTopoChange& ref) const for object " << name() << " : "
             << "Adding cell layer" << endl;
     }
 
@@ -674,7 +674,7 @@ void Foam::layerAdditionRemoval::addCellLayer
 
     if (debug)
     {
-        Pout<< "void layerAdditionRemoval::addCellLayer(polyTopoChange&) const "
+        Pout<< "void layerAdditionRemoval::addCellLayer(batchPolyTopoChange&) const "
             << " for object " << name() << ": "
             << "Finished adding cell layer" << endl;
     }

src/dynamicMesh/layerAdditionRemoval/layerAdditionRemoval.C

@@ -355,7 +355,7 @@ bool Foam::layerAdditionRemoval::changeTopology() const
 }
 
 
-void Foam::layerAdditionRemoval::setRefinement(polyTopoChange& ref) const
+void Foam::layerAdditionRemoval::setRefinement(batchPolyTopoChange& ref) const
 {
     // Insert the layer addition/removal instructions
     // into the topological change
@@ -367,7 +367,7 @@ void Foam::layerAdditionRemoval::setRefinement(polyTopoChange& ref) const
         // Clear addressing.  This also resets the addition/removal data
         if (debug)
         {
-            Pout<< "layerAdditionRemoval::setRefinement(polyTopoChange&) "
+            Pout<< "layerAdditionRemoval::setRefinement(batchPolyTopoChange&) "
                 << "for object " << name() << " : "
                 << "Clearing addressing after layer removal" << endl;
         }
@@ -383,7 +383,7 @@ void Foam::layerAdditionRemoval::setRefinement(polyTopoChange& ref) const
         // Clear addressing.  This also resets the addition/removal data
         if (debug)
         {
-            Pout<< "layerAdditionRemoval::setRefinement(polyTopoChange&) "
+            Pout<< "layerAdditionRemoval::setRefinement(batchPolyTopoChange&) "
                 << "for object " << name() << " : "
                 << "Clearing addressing after layer addition" << endl;
         }

src/dynamicMesh/layerAdditionRemoval/layerAdditionRemoval.H

@@ -119,10 +119,10 @@ class layerAdditionRemoval
             tmp<vectorField> extrusionDir() const;
 
             //- Add a layer of cells
-            void addCellLayer(polyTopoChange&) const;
+            void addCellLayer(batchPolyTopoChange&) const;
 
             //- Remove a layer of cells
-            void removeCellLayer(polyTopoChange&) const;
+            void removeCellLayer(batchPolyTopoChange&) const;
 
             //- Clear addressing
             void clearAddressing() const;
@@ -179,7 +179,7 @@ public:
 
         //- Insert the layer addition/removal instructions
         //  into the topological change
-        virtual void setRefinement(polyTopoChange&) const;
+        virtual void setRefinement(batchPolyTopoChange&) const;
 
         //- Modify motion points to comply with the topological change
         virtual void modifyMotionPoints(pointField& motionPoints) const;

src/dynamicMesh/layerAdditionRemoval/removeCellLayer.C

@@ -29,7 +29,7 @@ License
 #include "layerAdditionRemoval.H"
 #include "polyMesh.H"
 #include "primitiveMesh.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "oppositeFace.H"
 #include "polyTopoChanger.H"
 #include "polyRemoveCell.H"
@@ -83,7 +83,7 @@ bool Foam::layerAdditionRemoval::validCollapse() const
 
 void Foam::layerAdditionRemoval::removeCellLayer
 (
-    polyTopoChange& ref
+    batchPolyTopoChange& ref
 ) const
 {
     // Algorithm for layer removal.  Second phase: topological change

src/dynamicMesh/perfectInterface/perfectInterface.C

@@ -33,7 +33,7 @@ Description
 #include "perfectInterface.H"
 #include "polyTopoChanger.H"
 #include "polyMesh.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "addToRunTimeSelectionTable.H"
 #include "mapPolyMesh.H"
 #include "matchPoints.H"
@@ -154,7 +154,7 @@ void Foam::perfectInterface::setRefinement
 (
     const indirectPrimitivePatch& pp0,
     const indirectPrimitivePatch& pp1,
-    polyTopoChange& ref
+    batchPolyTopoChange& ref
 ) const
 {
     const polyMesh& mesh = topoChanger().mesh();
@@ -423,11 +423,11 @@ void Foam::perfectInterface::setRefinement
 }
 
 
-void Foam::perfectInterface::setRefinement(polyTopoChange& ref) const
+void Foam::perfectInterface::setRefinement(batchPolyTopoChange& ref) const
 {
     if (debug)
     {
-        Pout<< "bool perfectInterface::setRefinement(polyTopoChange&) const : "
+        Pout<< "bool perfectInterface::setRefinement(batchPolyTopoChange&) const : "
             << "for object " << name() << " : "
             << "masterPatchID_:" << masterPatchID_
             << " slavePatchID_:" << slavePatchID_

src/dynamicMesh/perfectInterface/perfectInterface.H

@@ -129,7 +129,7 @@ public:
 
         //- Insert the layer addition/removal instructions
         //  into the topological change
-        virtual void setRefinement(polyTopoChange&) const;
+        virtual void setRefinement(batchPolyTopoChange&) const;
 
         //- Insert the layer addition/removal instructions
         //  into the topological change. Uses only mesh, not any of the
@@ -139,7 +139,7 @@ public:
         (
             const indirectPrimitivePatch& pp0,
             const indirectPrimitivePatch& pp1,
-            polyTopoChange&
+            batchPolyTopoChange&
         ) const;
 
         //- Modify motion points to comply with the topological change

src/dynamicMesh/polyTopoChange/attachPolyTopoChanger/attachPolyTopoChanger.C

@@ -65,7 +65,10 @@ void Foam::attachPolyTopoChanger::attach(const bool removeEmptyPatches)
     const fileName oldInst = mesh_.facesInstance();
 
     // Execute all polyMeshModifiers
-    changeMesh(false);  // no inflation
+    // DISABLED - this functionality is lost
+    // Bad rewrite by Mattijs Janssens - completely misunderstood the interface
+    // Needs to use polyTopoChange, and not changer.
+    // changeMesh(false);  // no inflation
 
     const pointField p = mesh_.oldPoints();
 

src/dynamicMesh/polyTopoChange/polyMeshModifier/polyMeshModifier.H

@@ -55,7 +55,7 @@ namespace Foam
 
 // Forward Declarations
 class polyTopoChanger;
-class polyTopoChange;
+class batchPolyTopoChange;
 class mapPolyMesh;
 class polyMeshModifier;
 
@@ -166,7 +166,7 @@ public:
         virtual bool changeTopology() const = 0;
 
         //- Insert the topological change instructions
-        virtual void setRefinement(polyTopoChange&) const = 0;
+        virtual void setRefinement(batchPolyTopoChange&) const = 0;
 
         //- Modify motion points to comply with the topological change
         virtual void modifyMotionPoints(pointField& motionPoints) const = 0;

src/dynamicMesh/polyTopoChange/polyTopoChange/removeFaces.H

@@ -86,6 +86,19 @@ class removeFaces
             labelList& cellRegion
         ) const;
 
+        //- Changes region of connected set of faces. Returns number of changed
+        //  faces. For use with batch topo change
+        label changeFaceRegion
+        (
+            const labelList& cellRegion,
+            const boolList& removedFace,
+            const labelList& nFacesPerEdge,
+            const label faceI,
+            const label newRegion,
+
+            labelList& faceRegion
+        ) const;
+
         //- Changes region of connected set of faces
         label changeFaceRegion
         (
@@ -119,13 +132,15 @@ class removeFaces
             );
 
             //- Merge faceLabels into single face.
+            template<class TopoChangeEngine>
             void mergeFaces
             (
                 const labelList& cellRegion,
                 const labelList& cellRegionMaster,
                 const labelHashSet& pointsToRemove,
                 const labelList& faceLabels,
-                polyTopoChange& meshMod
+
+                TopoChangeEngine& meshMod
             ) const;
 
             //- Get patch, zone info for facei
@@ -141,6 +156,7 @@ class removeFaces
             face filterFace(const labelHashSet&, const label) const;
 
             //- Wrapper for meshMod.modifyFace. Reverses face if own>nei.
+            template<class TopoChangeEngine>
             void modFace
             (
                 const face& f,
@@ -153,11 +169,10 @@ class removeFaces
                 const label zoneID,
                 const bool zoneFlip,
 
-                polyTopoChange& meshMod
+                TopoChangeEngine& meshMod
             ) const;
 
 
-
         //- No copy construct
         removeFaces(const removeFaces&) = delete;
 
@@ -199,12 +214,15 @@ public:
 
 
         //- Play commands into polyTopoChange to remove faces.
+        template<class TopoChangeEngine>
         void setRefinement
         (
             const labelList& piercedFaces,
             const labelList& cellRegion,
-            const labelList& cellRegionMaster,
-            polyTopoChange&
+            // const labelList& pointRegionMaster,
+            labelList& cellRegionMaster,
+
+            TopoChangeEngine&
         ) const;
 
         //- Force recalculation of locally stored data on topological change
@@ -221,6 +239,10 @@ public:
 
 } // End namespace Foam
 
+#ifdef NoRepository
+#   include "removeFacesTemplates.C"
+#endif
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 #endif

src/dynamicMesh/polyTopoChange/polyTopoChanger/polyTopoChanger.C

@@ -28,7 +28,9 @@ License
 
 #include "polyTopoChanger.H"
 #include "polyMesh.H"
+#include "mapPolyMesh.H"
 #include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "Time.H"
 #include "PtrListOps.H"
 
@@ -192,14 +194,14 @@ bool Foam::polyTopoChanger::changeTopology() const
 }
 
 
-Foam::autoPtr<Foam::polyTopoChange>
+Foam::autoPtr<Foam::batchPolyTopoChange>
 Foam::polyTopoChanger::topoChangeRequest() const
 {
     // Collect changes from all modifiers
     const PtrList<polyMeshModifier>& topoChanges = *this;
 
-    auto ptr = autoPtr<polyTopoChange>::New(mesh());
-    polyTopoChange& ref = ptr.ref();
+    auto ptr = autoPtr<batchPolyTopoChange>::New(mesh());
+    batchPolyTopoChange& ref = ptr.ref();
 
     forAll(topoChanges, morphI)
     {
@@ -245,35 +247,35 @@ void Foam::polyTopoChanger::update(const mapPolyMesh& m)
 }
 
 
-Foam::autoPtr<Foam::mapPolyMesh> Foam::polyTopoChanger::changeMesh
-(
-    const bool inflate,
-    const bool syncParallel,
-    const bool orderCells,
-    const bool orderPoints
-)
-{
-    if (changeTopology())
-    {
-        autoPtr<polyTopoChange> ref = topoChangeRequest();
+// Foam::autoPtr<Foam::mapPolyMesh> Foam::polyTopoChanger::changeMesh
+// (
+//     const bool inflate,
+//     const bool syncParallel,
+//     const bool orderCells,
+//     const bool orderPoints
+// )
+// {
+//     if (changeTopology())
+//     {
+//         autoPtr<polyTopoChange> ref = topoChangeRequest();
 
-        autoPtr<mapPolyMesh> topoChangeMap = ref().changeMesh
-        (
-            mesh_,
-            inflate,
-            syncParallel,
-            orderCells,
-            orderPoints
-        );
+//         autoPtr<mapPolyMesh> topoChangeMap = ref().changeMesh
+//         (
+//             mesh_,
+//             inflate,
+//             syncParallel,
+//             orderCells,
+//             orderPoints
+//         );
 
-        update(topoChangeMap());
-        mesh_.updateMesh(topoChangeMap());
-        return topoChangeMap;
-    }
+//         update(topoChangeMap());
+//         mesh_.updateMesh(topoChangeMap());
+//         return topoChangeMap;
+//     }
 
-    mesh_.topoChanging(false);
-    return nullptr;
-}
+//     mesh_.topoChanging(false);
+//     return nullptr;
+// }
 
 
 void Foam::polyTopoChanger::addTopologyModifiers
@@ -326,6 +328,13 @@ Foam::label Foam::polyTopoChanger::findModifierID
 }
 
 
+Foam::label Foam::polyTopoChanger::morphIndex() const
+{
+    return morphIndex_;
+}
+
+
+// writeData member function required by regIOobject
 bool Foam::polyTopoChanger::writeData(Ostream& os) const
 {
     os << *this;

src/dynamicMesh/polyTopoChange/polyTopoChanger/polyTopoChanger.H

@@ -51,6 +51,7 @@ namespace Foam
 class polyMesh;
 class mapPolyMesh;
 class polyBoundaryMesh;
+class polyTopoChange;
 class polyTopoChanger;
 
 Ostream& operator<<(Ostream&, const polyTopoChanger&);
@@ -65,6 +66,12 @@ class polyTopoChanger
     public PtrList<polyMeshModifier>,
     public regIOobject
 {
+    // Private data
+
+        //- Current time index for mesh morph
+        label morphIndex_;
+
+
     // Private Member Functions
 
         //- Read if IOobject flags set, set modifiers. Return true if read.
@@ -84,6 +91,33 @@ protected:
         //- Reference to mesh
         polyMesh& mesh_;
 
+
+    // Protected Member Functions
+
+        // Topology changes
+
+            //- Rotate a face nShift positions in anticlockwise direction
+            static face rotateFace(const face& f, const label nShift);
+
+            //- Determine ordering of faces in coupled patches.
+            //  Calculate mapping to shuffle faces inside coupled patches and
+            //  rotation to make 0th vertex in faces align.
+            static bool reorderCoupledPatches
+            (
+                const polyBoundaryMesh& boundary,
+                const labelList& patchStarts,
+                const labelList& patchSizes,
+                const faceList& faces,
+                const pointField& points,
+                labelList& faceMap,
+                labelList& rotation
+            );
+
+            //- Sync communications required for couple patch reordering when
+            //  there is no local topological change
+            void syncCoupledPatches();
+
+
 public:
 
     //- Runtime type information
@@ -125,19 +159,27 @@ public:
         bool changeTopology() const;
 
         //- Return topology change request
-        autoPtr<polyTopoChange> topoChangeRequest() const;
+        autoPtr<batchPolyTopoChange> topoChangeRequest() const;
 
         //- Modify point motion
         void modifyMotionPoints(pointField&) const;
 
-        autoPtr<mapPolyMesh> changeMesh
+        // autoPtr<mapPolyMesh> changeMesh
+        // (
+        //     const bool inflate,
+        //     const bool syncParallel = true,
+        //     const bool orderCells = false,
+        //     const bool orderPoints = false
+        // );
+
+        static autoPtr<mapPolyMesh> changeMesh
         (
-            const bool inflate,
-            const bool syncParallel = true,
-            const bool orderCells = false,
-            const bool orderPoints = false
+            polyMesh&,
+            const batchPolyTopoChange&
         );
 
+        autoPtr<mapPolyMesh> changeMesh();
+
         //- Force recalculation of locally stored data on topological change
         void update(const mapPolyMesh& m);
 
@@ -147,6 +189,9 @@ public:
         //- Find modifier given a name
         label findModifierID(const word& modName) const;
 
+        //- Return morph index
+        label morphIndex() const;
+
 
         //- writeData member function required by regIOobject
         bool writeData(Ostream&) const;

src/dynamicMesh/refinement/polyhedralRefinement/polyhedralRefinement.H

@@ -0,0 +1,246 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::polyhedralRefinement
+
+Description
+    Isotropic refinement of polyhedral cells using the mesh modifier engine
+
+    Each polyhedral cell is split by the following procedure:
+    1. Adding points at the edge centre, face centre and cell centre,
+    2. Adding cells n cells where n is the number of points of the cell,
+    3. Splitting each face into multiple faces going from:
+       existing corner point -> new edge centre point -> new face centre
+       point -> other new edge centre point (sharing the same corner point)
+    4. Adding internal faces going from:
+       new edge centre point -> new face centre point -> new cell centre
+       point -> other new face centre point (sharing the same edge)
+
+SourceFiles
+    polyhedralRefinement.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+    Rewrite, porting and changes by Hrvoje Jasak, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef polyhedralRefinement_H
+#define polyhedralRefinement_H
+
+#include "refinement.H"
+#include "polyMesh.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                    Class polyhedralRefinement Declaration
+\*---------------------------------------------------------------------------*/
+
+class polyhedralRefinement
+:
+    public refinement
+{
+private:
+
+    // Private Member Functions
+
+        // Helper functions
+
+            //- Get least cell level such that the face has at least three
+            //  points smaller than the level
+            label getAnchorLevel(const label faceI) const;
+
+
+        // Local topology modification functions (operate on cells/faces)
+
+            //- Create all internal faces of split cellI into n cells
+            //   where n is the number of cell points
+            void createInternalFaces
+            (
+                const labelListList& cellAnchorPoints,
+                const labelListList& cellAddedCells,
+                const labelList& cellMidPoint,
+                const labelList& faceMidPoint,
+                const labelList& faceAnchorLevel,
+                const labelList& edgeMidPoint,
+                const label cellI,
+                batchPolyTopoChange& ref
+            ) const;
+
+
+        // Topological change helper functions
+
+            //- Get cell added to point of cellI (if any)
+            label getAnchorCell
+            (
+                const labelListList& cellAnchorPoints,
+                const labelListList& cellAddedCells,
+                const label cellI,
+                const label faceI,
+                const label pointI
+            ) const;
+
+            //- Set new owner and neighbour (in unspecified order) of pointI
+            //  on faceI
+            void setNewFaceNeighbours
+            (
+                const labelListList& cellAnchorPoints,
+                const labelListList& cellAddedCells,
+                const label faceI,
+                const label pointI,
+
+                label& own,
+                label& nei
+            ) const;
+
+            //- Find index of point with wantedLevel, starting from fp
+            label findLevel
+            (
+                const face& f,
+                const label startFp,
+                const bool searchForward,
+                const label wantedLevel
+            ) const;
+
+            //- Store in maps correspondence from midpoint to anchors and
+            //  faces. Used when creating internal faces
+            label storeMidPointInfo
+            (
+                const labelListList& cellAnchorPoints,
+                const labelListList& cellAddedCells,
+                const labelList& cellMidPoint,
+                const labelList& edgeMidPoint,
+                const label cellI,
+                const label faceI,
+                const bool faceOrder,
+                const label midPointI,
+                const label anchorPointI,
+                const label faceMidPointI,
+
+                Map<edge>& midPointToAnchors,
+                Map<edge>& midPointToFaceMids,
+                batchPolyTopoChange& ref
+            ) const;
+
+            //- If p0 and p1 are existing vertices check if edge is split
+            //  and insert splitPoint. Used with storing mid point
+            void insertEdgeSplit
+            (
+                const labelList& edgeMidPoint,
+                const label p0,
+                const label p1,
+                DynamicList<label>& verts
+            ) const;
+
+
+        // Copy control
+
+            //- Disallow default bitwise copy construct
+            polyhedralRefinement(const polyhedralRefinement&) = delete;
+
+            //- Disallow default bitwise assignment
+            void operator=(const polyhedralRefinement&) = delete;
+
+
+protected:
+
+    // Protected Pure Virtual Member Functions
+
+        // Global topology modification functions (operate on whole polyMesh)
+
+            //- Set refinement instruction
+            virtual void setRefinementInstruction
+            (
+                batchPolyTopoChange& ref
+            ) const;
+
+            //- Set unrefinement instruction
+            virtual void setUnrefinementInstruction
+            (
+                batchPolyTopoChange& ref
+            ) const;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("polyhedralRefinement");
+
+
+    // Constructors
+
+        //- Construct from dictionary
+        polyhedralRefinement
+        (
+            const word& name,
+            const dictionary& dict,
+            const label index,
+            const polyTopoChanger& mme
+        );
+
+
+    //- Destructor
+    virtual ~polyhedralRefinement() = default;
+
+
+    // Member Functions
+
+        // Edit
+
+            //- Set cells to refine given a list of refinement
+            //  candidates. Refinement candidates are extended within the
+            //  function due to possible 4:1 conflicts and specified number of
+            //  buffer layers.
+            //  Note: must be called BEFORE setSplitPointsToUnrefine
+            virtual void setCellsToRefine
+            (
+                const labelList& refinementCellCandidates
+            );
+
+            //- Set split points to unrefine given a list of all mesh points
+            //  that are candidates for unrefinement. Split points are
+            //  determined as a subset of unrefinement candidates, avoiding
+            //  splitting points of cells that are going to be refined at the
+            //  same time and ensuring consistent unrefinement.
+            //  Note: must be called AFTER setCellsToRefine
+            virtual void setSplitPointsToUnrefine
+            (
+                const labelList& unrefinementPointCandidates
+            );
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/dynamicMesh/refinement/prismatic2DRefinement/prismatic2DRefinement.H

@@ -0,0 +1,254 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::prismatic2DRefinement
+
+Description
+    Isotropic refinement of prismatic cells in 2D using the mesh modifier
+    engine. Used for 2D cases instead of polyhedralRefinement which carries
+    unnecessary overhead in terms of number of cells since it splits the cell in
+    all directions.
+
+    Each prismatic cell is split by the following procedure:
+    1. Adding points at the face centres and edge centres of all faces found on
+       an special patch: empty or wedge.
+    2. Adding n cells per existing cell where n is the number of corner points
+       at the face on special patch (empty or wedge).
+    3. Splitting each of the faces on special patch (empty or wedge) into
+       multiple faces going from: existing corner point -> new edge centre point
+       -> new face centre point -> other new edge centre point (sharing the same
+       corner point)
+    4. Spliiting each of the faces not on an special patch (empty or wedge) into
+       two faces going from: existing corner point -> existing corner point on
+       the other side -> new edge centre point on the other side -> new edge
+       centre point on my side
+    4. Adding internal faces going from:
+       new edge centre point -> new face centre point -> new other face
+       centre point on the other side -> new other edge mid point on the other
+       side
+
+    It is an error to try and run this on anything except a 2D mesh.
+
+SourceFiles
+    prismatic2DRefinement.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef prismatic2DRefinement_H
+#define prismatic2DRefinement_H
+
+#include "refinement.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                    Class prismatic2DRefinement Declaration
+\*---------------------------------------------------------------------------*/
+
+class prismatic2DRefinement
+:
+    public refinement
+{
+private:
+
+    // Private Member Functions
+
+        // Helper functions
+
+            //- Get least cell level such that the face has at least nPoints
+            //  points smaller than the level
+            label getAnchorLevel
+            (
+                const label faceI,
+                const label nPoints
+            ) const;
+
+            //- Append given face into a dynamic list containing split faces
+            //  that will be split into two faces (third parameter). Additionaly
+            //  append information on which of the two edges of the face are on
+            //  special patch into a dynamic list (fourth parameter)
+            void appendFaceSplitInfo
+            (
+                const label& faceI,
+                const boolList& edgeOnEmptyPatch,
+                const labelList& edgeMidPoint,
+                DynamicList<label>& splitFacesIntoTwo,
+                DynamicList<Pair<label> >& splitFacesEmptyEdges
+            ) const;
+
+
+        // Topological change helper functions
+
+            //- Set new owner and neighbour given anchor pointI, faceI and the
+            //  necessary mapping
+            void setNewFaceNeighbours
+            (
+                const HashTable
+                <
+                    label,
+                    Pair<label>,
+                    Hash<FixedList<label, 2> >
+                >& pointCellToAddedCellMap,
+                const labelListList& cellAddedCells,
+                const label& faceI,
+                const label& pointI,
+
+                label& own,
+                label& nei
+            ) const;
+
+            //- Get index of point with minimum point level of a face across two
+            //  connected edges starting from a local point index.
+            //  Example: starting from point with level 1 in the upper left
+            //  corner, finds point index of the point with level 0 which is on
+            //  the same face, connected with edge to original point
+            //  1------1
+            //  |
+            //  |
+            //  0
+            //  Note: passing face edges and mesh edges as parameters to avoid
+            //  fetching them from mesh due to lazy evaluation
+            label findMinEdgeConnectedLevel
+            (
+                const label& fpI,
+                const label& faceI,
+                const face& f,
+                const labelList& fEdges,
+                const edgeList& meshEdges
+            ) const;
+
+            //- Store two face mids when adding internal faces
+            void addFaceMids
+            (
+                const labelList& faceMidPoint,
+                const boolList& faceOnEmptyPatch,
+                const label& faceI,
+                const label& cellI,
+                face& newFace
+            ) const;
+
+
+        // Debug functions
+
+            //- Check orientation of a split face
+            void checkNewFaceOrientation
+            (
+                batchPolyTopoChange& ref,
+                const label& faceI,
+                const face& newFace
+            ) const;
+
+
+        // Copy control
+
+            //- Disallow default bitwise copy construct
+            prismatic2DRefinement(const prismatic2DRefinement&) = delete;
+
+            //- Disallow default bitwise assignment
+            void operator=(const prismatic2DRefinement&) = delete;
+
+
+protected:
+
+    // Protected Pure Virtual Member Functions
+
+        // Global topology modification functions (operate on whole polyMesh)
+
+            //- Set refinement instruction
+            virtual void setRefinementInstruction
+            (
+                batchPolyTopoChange& ref
+            ) const;
+
+            //- Set unrefinement instruction
+            virtual void setUnrefinementInstruction
+            (
+                batchPolyTopoChange& ref
+            ) const;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("prismatic2DRefinement");
+
+
+    // Constructors
+
+        //- Construct from dictionary
+        prismatic2DRefinement
+        (
+            const word& name,
+            const dictionary& dict,
+            const label index,
+            const polyTopoChanger& mme
+        );
+
+
+    //- Destructor
+    virtual ~prismatic2DRefinement();
+
+
+    // Member Functions
+
+        // Edit
+
+            //- Set cells to refine given a list of refinement
+            //  candidates. Refinement candidates are extended within the
+            //  function due to possible 4:1 conflicts and specified number of
+            //  buffer layers.
+            //  Note: must be called BEFORE setSplitPointsToUnrefine
+            virtual void setCellsToRefine
+            (
+                const labelList& refinementCellCandidates
+            );
+
+            //- Set split points to unrefine given a list of all mesh points
+            //  that are candidates for unrefinement. Split points are
+            //  determined as a subset of unrefinement candidates, avoiding
+            //  splitting points of cells that are going to be refined at the
+            //  same time and ensuring consistent unrefinement.
+            //  Note: must be called AFTER setCellsToRefine
+            void setSplitPointsToUnrefine
+            (
+                const labelList& unrefinementPointCandidates
+            );
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/dynamicMesh/refinement/refinement/refinement.H

@@ -0,0 +1,392 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::refinement
+
+Description
+    Abstract base class for adaptive mesh refinement using the mesh modifier
+    engine. The class provides common interface and functionalities for 3D
+    polyhedral refinement and 2D prismatic refinement.
+
+    The common interface includes (pure virtuals) following member functions:
+    - setCellsToRefine
+    - setSplitPointsToUnrefine
+
+    With a lot of ordinary protected member functions which are used by both
+    derived classes.
+
+    Note: I've written it this way in order to avoid unnecesasry code
+    duplication, but I'm 99% sure that if someone else wants to write additional
+    refinement strategy (e.g. directional refinement) as derived class, the
+    interface will need to change.
+
+SourceFiles
+    refinement.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+Notes
+    Generalisation of hexRef8 for polyhedral cells and refactorisation using
+    polyMesh modifier engine.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef refinement_H
+#define refinement_H
+
+#include "polyMeshModifier.H"
+#include "labelIOField.H"
+#include "removeFaces.H"
+#include "batchPolyTopoChange.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                            Class refinement Declaration
+\*---------------------------------------------------------------------------*/
+
+class refinement
+:
+    public polyMeshModifier
+{
+protected:
+
+    // Protected enumeration for refinement status
+    enum refinementStatus
+    {
+        UNREFINED = -1,
+        UNCHANGED = 0,
+        REFINED = 1
+    };
+
+    static const scalar nonOrthThreshold_;
+
+    // Protected data
+
+        //- Reference to polyMesh for easy access in helper functions
+        const polyMesh& mesh_;
+
+
+        // Refinement control and handling
+
+            //- List of cells to refine in this time step
+            mutable labelList cellsToRefine_;
+
+            //- List of split point labels to unrefine in this time step
+            mutable labelList splitPointsToUnrefine_;
+
+            //- Cell refinement level
+            mutable labelIOField cellLevel_;
+
+            //- Point refinement level
+            mutable labelIOField pointLevel_;
+
+            //- Helper list for original (old) cells that will be refined or
+            //  unrefined. The list is updated in setPolyhedralRefinement and
+            //  setPolyhedralUnfereinement and is used in updateMesh to update
+            //  the cellLevel on the new mesh.
+            //  Values stored in the list are:
+            //  a) UNREFINED = -1 = cell is unrefined
+            //  b) UNCHANGED =  0 = cell is untouched
+            //  c) REFINED   = +1 = cell is refined
+            mutable labelList refinementLevelIndicator_;
+
+            //- Face remover engine
+            mutable removeFaces faceRemover_;
+
+            //- Maximum number of cells in the mesh. Note: not strictly enforced
+            label maxCells_;
+
+            //- Maximum number of refinement levels for a given cell
+            label maxRefinementLevel_;
+
+            //- Switch whether to use edge based consistency on refinement
+            Switch edgeBasedConsistency_;
+
+            //- Number of buffer layers for refinement
+            label nRefinementBufferLayers_;
+
+            //- Number of buffer layers for unrefinement, controlling how far
+            //  the unrefinement region needs to be from current refinement
+            //  region
+            label nUnrefinementBufferLayers_;
+
+
+    // Protected Pure Virtual Member Functions
+
+        // Global topology modification functions (operate on whole polyMesh)
+
+            //- Set refinement instruction
+            virtual void setRefinementInstruction
+            (
+                batchPolyTopoChange& ref
+            ) const = 0;
+
+            //- Set unrefinement instruction
+            virtual void setUnrefinementInstruction
+            (
+                batchPolyTopoChange& ref
+            ) const = 0;
+
+
+    // Protected Member Functions
+
+        // Useful helper functions used by derived classes
+
+            //- Set file instance for cellLevel_ and pointLevel_
+            void setInstance(const fileName& inst) const;
+
+
+        // Local topology modification functions (operate on cells/faces)
+
+            //- Adds a face on top of existing faceI. Reverses if nessecary
+            label addFace
+            (
+                batchPolyTopoChange& ref,
+                const label faceI,
+                const face& newFace,
+                const label own,
+                const label nei
+            ) const;
+
+            //- Adds internal face from point. No checks on reversal
+            label addInternalFace
+            (
+                batchPolyTopoChange& ref,
+                const label meshFaceI,
+                const label meshPointI,
+                const face& newFace,
+                const label own,
+                const label nei
+            ) const;
+
+            //- Modifies existing faceI for either new owner/neighbour or new
+            //  face points. Reverses if nessecary
+            void modifyFace
+            (
+                batchPolyTopoChange& ref,
+                const label faceI,
+                const face& newFace,
+                const label own,
+                const label nei
+            ) const;
+
+
+        // Topological change helper functions
+
+            //- Store vertices from startFp up to face split point.
+            //  Used when splitting face into n faces where n is the number of
+            //  points in a face (or number of edges)
+            void walkFaceToMid
+            (
+                const labelList& edgeMidPoint,
+                const label cLevel,
+                const label faceI,
+                const label startFp,
+                DynamicList<label>& faceVerts
+            ) const;
+
+            //- Same as walkFaceToMid but now walk back
+            void walkFaceFromMid
+            (
+                const labelList& edgeMidPoint,
+                const label cLevel,
+                const label faceI,
+                const label startFp,
+                DynamicList<label>& faceVerts
+            ) const;
+
+            //- Get index of point with minimum point level
+            label findMinLevel(const labelList& f) const;
+
+            //- Get index of point with maximum point level
+            label findMaxLevel(const labelList& f) const;
+
+            //- Count number of vertices <= anchorLevel for a given face
+            label countAnchors
+            (
+                const labelList& f,
+                const label anchorLevel
+            ) const;
+
+            //- Adjust cell refinement level after topo change
+            void adjustRefLevel
+            (
+                label& curNewCellLevel,
+                const label oldCellI
+            );
+
+
+        // Debug functions
+
+            //- Check orientation of added internal face
+            void checkInternalOrientation
+            (
+                batchPolyTopoChange& ref,
+                const label cellI,
+                const label faceI,
+                const point& ownPt,
+                const point& neiPt,
+                const face& newFace
+            ) const;
+
+            //- Check orientation of a new boundary face
+            void checkBoundaryOrientation
+            (
+                batchPolyTopoChange& ref,
+                const label cellI,
+                const label faceI,
+                const point& ownPt,
+                const point& boundaryPt,
+                const face& newFace
+            ) const;
+
+
+        // Refinement/unrefinement consistency checks
+
+            //- Updates cellsToRefine such that a face consistent 2:1 refinement
+            //  is obtained. Returns local number of cells changed
+            label faceConsistentRefinement(boolList& cellsToRefine) const;
+
+            //- Updates cellsToRefine such that an edge consistent 4:1 refinement
+            //  is obtained. Returns local number of cells changed
+            label edgeConsistentRefinement(boolList& cellsToRefine) const;
+
+            //- Updates cellsToUnrefine such that a face consistent 2:1
+            //  unrefinement is obtained. Returns local number of cells changed
+            label faceConsistentUnrefinement(boolList& cellsToUnrefine) const;
+
+            //- Updates cellsToUnrefine such that an edge consistent 4:1
+            //  unrefinement is obtained. Returns local number of cells changed
+            label edgeConsistentUnrefinement(boolList& cellsToUnrefine) const;
+
+
+        // Copy control
+
+            //- Disallow default bitwise copy construct
+            refinement(const refinement&);
+
+            //- Disallow default bitwise assignment
+            void operator=(const refinement&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("refinement");
+
+
+    // Constructors
+
+        //- Construct from dictionary
+        refinement
+        (
+            const word& name,
+            const dictionary& dict,
+            const label index,
+            const polyTopoChanger& mme
+        );
+
+
+    //- Destructor
+    virtual ~refinement() = default;
+
+
+    // Member Functions
+
+        // Access
+
+            //- Return refinement cell level
+            const labelIOField& cellLevel() const
+            {
+                return cellLevel_;
+            }
+
+            //- Return refinement point level
+            const labelIOField& pointLevel() const
+            {
+                return pointLevel_;
+            }
+
+
+        // Edit
+
+            //- Set cells to refine given a list of refinement
+            //  candidates. Refinement candidates are extended within the
+            //  function due to possible 4:1 conflicts and specified number of
+            //  buffer layers.
+            //  Note: must be called BEFORE setSplitPointsToUnrefine
+            virtual void setCellsToRefine
+            (
+                const labelList& refinementCellCandidates
+            ) = 0;
+
+            //- Set split points to unrefine given a list of all mesh points
+            //  that are candidates for unrefinement. Split points are
+            //  determined as a subset of unrefinement candidates, avoiding
+            //  splitting points of cells that are going to be refined at the
+            //  same time and ensuring consistent unrefinement.
+            //  Note: must be called AFTER setCellsToRefine
+            virtual void setSplitPointsToUnrefine
+            (
+                const labelList& unrefinementPointCandidates
+            ) = 0;
+
+
+        // Inherited interface from polyMeshModifier
+
+            //- Check for topology change
+            virtual bool changeTopology() const;
+
+            //- Insert the polyhedral refinement/unrefinement into the
+            //  topological change
+            virtual void setRefinement(batchPolyTopoChange&) const;
+
+            //- Modify motion points to comply with the topological change
+            virtual void modifyMotionPoints(pointField& motionPoints) const;
+
+            //- Force recalculation of locally stored data on topological change
+            virtual void updateMesh(const mapPolyMesh&);
+
+            //- Write
+            virtual void write(Ostream&) const;
+
+            //- Write dictionary
+            virtual void writeDict(Ostream&) const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/dynamicMesh/refinement/refinement/refinementTools.H

@@ -0,0 +1,351 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Namespace
+    Foam::refinementTools
+
+Description
+    Collection of static functions to do various simple mesh related things.
+
+SourceFiles
+    refinementTools.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef refinementTools_H
+#define refinementTools_H
+
+#include "vector.H"
+#include "label.H"
+#include "labelList.H"
+#include "pointField.H"
+#include "faceList.H"
+#include "cellList.H"
+#include "primitivePatch.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+class primitiveMesh;
+class polyMesh;
+
+/*---------------------------------------------------------------------------*\
+                    Namespace refinementTools Declaration
+\*---------------------------------------------------------------------------*/
+
+namespace refinementTools
+{
+    // Bit identifiers for octants (p=plus, m=min e.g. plusXminYminZ)
+
+    static const label mXmYmZ = 0;
+    static const label pXmYmZ = 1;
+    static const label mXpYmZ = 2;
+    static const label pXpYmZ = 3;
+
+    static const label mXmYpZ = 4;
+    static const label pXmYpZ = 5;
+    static const label mXpYpZ = 6;
+    static const label pXpYpZ = 7;
+
+    static const label mXmYmZMask = 1 << mXmYmZ;
+    static const label pXmYmZMask = 1 << pXmYmZ;
+    static const label mXpYmZMask = 1 << mXpYmZ;
+    static const label pXpYmZMask = 1 << pXpYmZ;
+
+    static const label mXmYpZMask = 1 << mXmYpZ;
+    static const label pXmYpZMask = 1 << pXmYpZ;
+    static const label mXpYpZMask = 1 << mXpYpZ;
+    static const label pXpYpZMask = 1 << pXpYpZ;
+
+
+    // Normal handling
+
+        //- Check if n is in same direction as normals of all faceLabels
+        bool visNormal
+        (
+            const vector& n,
+            const vectorField& faceNormals,
+            const labelList& faceLabels
+        );
+
+        //- Calculate point normals on a 'box' mesh (all edges aligned with
+        //  coordinate axes)
+        vectorField calcBoxPointNormals(const primitivePatch& pp);
+
+        //- Normalized edge vector
+        vector normEdgeVec(const primitiveMesh&, const label edgeI);
+
+
+    // OBJ writing
+
+        //- Write obj representation of point
+        void writeOBJ
+        (
+            Ostream& os,
+            const point& pt
+        );
+
+        //- Write obj representation of faces subset
+        void writeOBJ
+        (
+            Ostream& os,
+            const faceList&,
+            const pointField&,
+            const labelList& faceLabels
+        );
+
+        //- Write obj representation of faces
+        void writeOBJ
+        (
+            Ostream& os,
+            const faceList&,
+            const pointField&
+        );
+
+        //- Write obj representation of cell subset
+        void writeOBJ
+        (
+            Ostream& os,
+            const cellList&,
+            const faceList&,
+            const pointField&,
+            const labelList& cellLabels
+        );
+
+
+    // Cell/face/edge walking
+
+        //- Is edge used by cell
+        bool edgeOnCell
+        (
+            const primitiveMesh&,
+            const label cellI,
+            const label edgeI
+        );
+
+        //- Is edge used by face
+        bool edgeOnFace
+        (
+            const primitiveMesh&,
+            const label faceI,
+            const label edgeI
+        );
+
+        //- Is face used by cell
+        bool faceOnCell
+        (
+            const primitiveMesh&,
+            const label cellI,
+            const label faceI
+        );
+
+        //- Return edge among candidates that uses the two vertices.
+        label findEdge
+        (
+            const edgeList& edges,
+            const labelList& candidates,
+            const label v0,
+            const label v1
+        );
+
+        //- Return edge between two vertices. Returns -1 if no edge.
+        label findEdge
+        (
+            const primitiveMesh&,
+            const label v0,
+            const label v1
+        );
+
+        //- Return edge shared by two faces. Throws error if no edge found.
+        label getSharedEdge
+        (
+            const primitiveMesh&,
+            const label f0,
+            const label f1
+        );
+
+        //- Return face shared by two cells. Throws error if none found.
+        label getSharedFace
+        (
+            const primitiveMesh&,
+            const label cell0,
+            const label cell1
+        );
+
+        //- Get faces on cell using edgeI. Throws error if no two found.
+        void getEdgeFaces
+        (
+            const primitiveMesh&,
+            const label cellI,
+            const label edgeI,
+            label& face0,
+            label& face1
+        );
+
+        //- Return label of other edge (out of candidates edgeLabels)
+        //  connected to vertex but not edgeI. Throws error if none found.
+        label otherEdge
+        (
+            const primitiveMesh&,
+            const labelList& edgeLabels,
+            const label edgeI,
+            const label vertI
+        );
+
+        //- Return face on cell using edgeI but not faceI. Throws error
+        //  if none found.
+        label otherFace
+        (
+            const primitiveMesh&,
+            const label cellI,
+            const label faceI,
+            const label edgeI
+        );
+
+        //- Return cell on other side of face. Throws error
+        //  if face not internal.
+        label otherCell
+        (
+            const primitiveMesh&,
+            const label cellI,
+            const label faceI
+        );
+
+        //- Returns label of edge nEdges away from startEdge (in the direction
+        // of startVertI)
+        label walkFace
+        (
+            const primitiveMesh&,
+            const label faceI,
+            const label startEdgeI,
+            const label startVertI,
+            const label nEdges
+        );
+
+
+    // Constraints on position
+
+        //- Set the constrained components of position to mesh centre
+        void constrainToMeshCentre
+        (
+            const polyMesh& mesh,
+            point& pt
+        );
+        void constrainToMeshCentre
+        (
+            const polyMesh& mesh,
+            pointField& pt
+        );
+
+        //- Set the constrained components of directions/velocity to zero
+        void constrainDirection
+        (
+            const polyMesh& mesh,
+            const Vector<label>& dirs,
+            vector& d
+        );
+        void constrainDirection
+        (
+            const polyMesh& mesh,
+            const Vector<label>& dirs,
+            vectorField& d
+        );
+
+
+    // Hex only functionality
+
+        //- Given edge on hex find other 'parallel', non-connected edges.
+        void getParallelEdges
+        (
+            const primitiveMesh&,
+            const label cellI,
+            const label e0,
+            label&,
+            label&,
+            label&
+        );
+
+        //- Given edge on hex find all 'parallel' (i.e. non-connected)
+        //  edges and average direction of them
+        vector edgeToCutDir
+        (
+            const primitiveMesh&,
+            const label cellI,
+            const label edgeI
+        );
+
+        //- Reverse of edgeToCutDir: given direction find edge bundle and
+        //  return one of them.
+        label cutDirToEdge
+        (
+            const primitiveMesh&,
+            const label cellI,
+            const vector& cutDir
+        );
+
+
+    // Face information
+
+        //- Set face information: patch, zone and zone flip for a face
+        void setFaceInfo
+        (
+            const polyMesh& mesh,
+            const label faceI,
+            label& patchID,
+            label& zoneID,
+            label& zoneFlip
+        );
+
+
+    // Mark-up of mesh bits. Relocated from refinement polyMeshModifier
+
+        //- Extend marked cells across faces given a bool list of already marked
+        //  cells
+        void extendMarkedCellsAcrossFaces
+        (
+            const polyMesh& mesh,
+            boolList& markedCell
+        );
+
+        //- Extend marked cells across points given a bool list of already
+        //  marked cells
+        void extendMarkedCellsAcrossPoints
+        (
+            const polyMesh& mesh,
+            boolList& markedCell
+        );
+
+} // End namespace refinementTools
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/dynamicMesh/setUpdater/setUpdater.C

@@ -27,7 +27,7 @@ License
 
 #include "setUpdater.H"
 #include "polyTopoChanger.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "addToRunTimeSelectionTable.H"
 #include "mapPolyMesh.H"
 #include "cellSet.H"
@@ -71,7 +71,7 @@ bool Foam::setUpdater::changeTopology() const
 }
 
 
-void Foam::setUpdater::setRefinement(polyTopoChange&) const
+void Foam::setUpdater::setRefinement(batchPolyTopoChange&) const
 {}
 
 

src/dynamicMesh/setUpdater/setUpdater.H

@@ -97,7 +97,7 @@ public:
 
         //- Insert the layer addition/removal instructions
         //  into the topological change
-        virtual void setRefinement(polyTopoChange&) const;
+        virtual void setRefinement(batchPolyTopoChange&) const;
 
         //- Modify motion points to comply with the topological change
         virtual void modifyMotionPoints(pointField& motionPoints) const;

src/dynamicMesh/slidingInterface/coupleSlidingInterface.C

@@ -27,7 +27,7 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "slidingInterface.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "polyMesh.H"
 #include "primitiveMesh.H"
 #include "enrichedPatch.H"
@@ -69,7 +69,7 @@ const Foam::scalar Foam::slidingInterface::edgeCoPlanarTolDefault_ = 0.8;
 // - - missed master edge in cut
 // u - edge already used in cutting
 
-void Foam::slidingInterface::coupleInterface(polyTopoChange& ref) const
+void Foam::slidingInterface::coupleInterface(batchPolyTopoChange& ref) const
 {
     if (debug)
     {

src/dynamicMesh/slidingInterface/decoupleSlidingInterface.C

@@ -29,7 +29,7 @@ License
 #include "slidingInterface.H"
 #include "polyMesh.H"
 #include "primitiveMesh.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "polyTopoChanger.H"
 #include "polyModifyFace.H"
 #include "polyModifyPoint.H"
@@ -38,7 +38,7 @@ License
 
 void Foam::slidingInterface::decoupleInterface
 (
-    polyTopoChange& ref
+    batchPolyTopoChange& ref
 ) const
 {
     if (debug)

src/dynamicMesh/slidingInterface/slidingInterface.C

@@ -29,7 +29,7 @@ License
 #include "slidingInterface.H"
 #include "polyTopoChanger.H"
 #include "polyMesh.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "addToRunTimeSelectionTable.H"
 #include "plane.H"
 
@@ -367,7 +367,7 @@ bool Foam::slidingInterface::changeTopology() const
 }
 
 
-void Foam::slidingInterface::setRefinement(polyTopoChange& ref) const
+void Foam::slidingInterface::setRefinement(batchPolyTopoChange& ref) const
 {
     if (coupleDecouple_)
     {

src/dynamicMesh/slidingInterface/slidingInterface.H

@@ -264,19 +264,19 @@ private:
             bool projectPoints() const;
 
             //- Couple sliding interface
-            void coupleInterface(polyTopoChange& ref) const;
+            void coupleInterface(batchPolyTopoChange& ref) const;
 
             //- Clear projection
             void clearPointProjection() const;
 
             //- Clear old couple
-            void clearCouple(polyTopoChange& ref) const;
+            void clearCouple(batchPolyTopoChange& ref) const;
 
             //- Decouple interface (returns it to decoupled state)
             //  Note: this should not be used in normal operation of the
             //  sliding mesh, but only to return the mesh to its
             //  original state
-            void decoupleInterface(polyTopoChange& ref) const;
+            void decoupleInterface(batchPolyTopoChange& ref) const;
 
 
     // Static data members
@@ -364,7 +364,7 @@ public:
 
         //- Insert the layer addition/removal instructions
         //  into the topological change
-        virtual void setRefinement(polyTopoChange&) const;
+        virtual void setRefinement(batchPolyTopoChange&) const;
 
         //- Modify motion points to comply with the topological change
         virtual void modifyMotionPoints(pointField& motionPoints) const;

src/dynamicMesh/slidingInterface/slidingInterfaceClearCouple.C

@@ -27,7 +27,7 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "slidingInterface.H"
-#include "polyTopoChange.H"
+#include "batchPolyTopoChange.H"
 #include "polyMesh.H"
 #include "polyTopoChanger.H"
 #include "polyRemovePoint.H"
@@ -37,7 +37,7 @@ License
 
 void Foam::slidingInterface::clearCouple
 (
-    polyTopoChange& ref
+    batchPolyTopoChange& ref
 ) const
 {
     if (debug)

src/finiteVolume/fvMesh/fvMesh.C

@@ -975,6 +975,8 @@ void Foam::fvMesh::updateMesh(const mapPolyMesh& mpm)
     lduPtr_.reset(nullptr);
 
     if (VPtr_)
+    {
+        if (mpm.hasOldCellVolumes())
         {
             // Grab old time volumes if the time has been incremented
             // This will update V0, V00
@@ -1006,6 +1008,11 @@ void Foam::fvMesh::updateMesh(const mapPolyMesh& mpm)
                         << exit(FatalError);
             }
         }
+        else
+        {
+            deleteDemandDrivenData(VPtr_);
+        }
+    }
 
 
     // Clear mesh motion flux (note: could instead save & map like volumes)

src/meshTools/Make/files

@@ -328,6 +328,8 @@ mappedPatches/mappedPolyPatch/mappedVariableThicknessWallPolyPatch.C
 mappedPatches/mappedPointPatch/mappedPointPatch.C
 mappedPatches/mappedPointPatch/mappedWallPointPatch.C
 
+batchPolyTopoChange/batchPolyTopoChange.C
+
 polyTopoChange/topoAction/topoActions.C
 polyTopoChange/polyTopoChange.C
 

src/meshTools/batchPolyTopoChange/batchPolyTopoChange.C

@@ -0,0 +1,417 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "batchPolyTopoChange.H"
+#include "polyMesh.H"
+#include "primitiveMesh.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+const Foam::label Foam::batchPolyTopoChange::minListSize = 100;
+const Foam::label Foam::batchPolyTopoChange::pointFraction = 10;
+const Foam::label Foam::batchPolyTopoChange::faceFraction = 10;
+const Foam::label Foam::batchPolyTopoChange::cellFraction = 10;
+
+namespace Foam
+{
+    defineTypeNameAndDebug(batchPolyTopoChange, 0);
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+// Construct from mesh reference
+Foam::batchPolyTopoChange::batchPolyTopoChange(const polyMesh& mesh)
+:
+    mesh_(mesh),
+    addedPoints_(minListSize),
+    modifiedPoints_(minListSize),
+    removedPoints_
+    (
+        Foam::max(mesh.points().size()/pointFraction, minListSize)
+    ),
+    addedFaces_(minListSize),
+    modifiedFaces_(minListSize),
+    removedFaces_(Foam::max(mesh.faces().size()/faceFraction, minListSize)),
+    addedCells_(minListSize),
+    removedCells_(Foam::max(mesh.nCells()/cellFraction, minListSize))
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+Foam::label Foam::batchPolyTopoChange::setAction(const topoAction& action)
+{
+    if (isType<polyAddPoint>(action))
+    {
+        addedPoints_.append(refCast<const polyAddPoint>(action));
+
+        return mesh_.points().size() + addedPoints_.size() - 1;
+    }
+    else if (isType<polyModifyPoint>(action))
+    {
+        const polyModifyPoint& pmp = refCast<const polyModifyPoint>(action);
+
+        if (debug)
+        {
+            if (removedPoints_.find(pmp.pointID()) != removedPoints_.end())
+            {
+                FatalErrorInFunction
+                    << "Modifying point " << pmp.pointID()
+                    << " for the second time or modifying a removed point.  "
+                    << "This is not allowed."
+                    << abort(FatalError);
+            }
+        }
+
+        modifiedPoints_.append(pmp);
+        removedPoints_.insert(pmp.pointID());
+
+        return -1;
+    }
+    else if (isType<polyRemovePoint>(action))
+    {
+        const polyRemovePoint& prp = refCast<const polyRemovePoint>(action);
+
+        if (debug)
+        {
+            if (removedPoints_.find(prp.pointID()) != removedPoints_.end())
+            {
+                FatalErrorInFunction
+                    << "Removing point " << prp.pointID()
+                    << " for the second time or removing a modified point.  "
+                    << "This is not allowed."
+                    << abort(FatalError);
+            }
+        }
+
+        removedPoints_.insert(prp.pointID());
+
+        return -1;
+    }
+    else if (isType<polyAddFace>(action))
+    {
+        addedFaces_.append(refCast<const polyAddFace>(action));
+
+        return mesh_.faces().size() + addedFaces_.size() - 1;
+    }
+    else if (isType<polyModifyFace>(action))
+    {
+        const polyModifyFace& pmf = refCast<const polyModifyFace>(action);
+
+        if (debug)
+        {
+            if (removedFaces_.find(pmf.faceID()) != removedFaces_.end())
+            {
+                FatalErrorInFunction
+                    << "Modifying face " << pmf.faceID()
+                    << " for the second time or modifying a removed face.  "
+                    << "This is not allowed."
+                    << abort(FatalError);
+            }
+        }
+
+        modifiedFaces_.append(pmf);
+        removedFaces_.insert(pmf.faceID());
+
+        return -1;
+    }
+    else if (isType<polyRemoveFace>(action))
+    {
+        const polyRemoveFace& prf = refCast<const polyRemoveFace>(action);
+
+        if (debug)
+        {
+            if (removedFaces_.find(prf.faceID()) != removedFaces_.end())
+            {
+                FatalErrorInFunction
+                    << "Removing face " << prf.faceID()
+                    << " for the second time or removing a modified face.  "
+                    << "This is not allowed."
+                    << abort(FatalError);
+            }
+        }
+
+        removedFaces_.insert(prf.faceID());
+
+        return -1;
+    }
+    else if (isType<polyAddCell>(action))
+    {
+        addedCells_.append(refCast<const polyAddCell>(action));
+
+        return mesh_.nCells() + addedCells_.size() - 1;
+    }
+    else if (isType<polyModifyCell>(action))
+    {
+        const polyModifyCell& pmc = refCast<const polyModifyCell>(action);
+
+        modifiedCells_.append(pmc);
+
+        return -1;
+    }
+    else if (isType<polyRemoveCell>(action))
+    {
+        const polyRemoveCell& prc = refCast<const polyRemoveCell>(action);
+
+        if (debug)
+        {
+            if (removedCells_.find(prc.cellID()) != removedCells_.end())
+            {
+                FatalErrorInFunction
+                    << "Removing cell " << prc.cellID()
+                    << " for the second time.  This is not allowed."
+                    << abort(FatalError);
+            }
+        }
+
+        removedCells_.insert(prc.cellID());
+
+        return -1;
+    }
+    else
+    {
+        FatalErrorInFunction
+            << "Unknown type of topoChange: " << action.type()
+            << abort(FatalError);
+
+        // Dummy return to keep compiler happy
+        return -1;
+    }
+}
+
+
+bool Foam::batchPolyTopoChange::check() const
+{
+    if (debug)
+    {
+        Info<< "Points: added = " << addedPoints_.size()
+            << " modified = " << modifiedPoints_.size()
+            << " removed = " << removedPoints_.size() - modifiedPoints_.size()
+            << " balance = " << pointBalance()
+            << endl;
+
+        Info<< "Faces: added = " << addedFaces_.size()
+            << " modified = " << modifiedFaces_.size()
+            << " removed = " << removedFaces_.size() - modifiedFaces_.size()
+            << " balance = " << faceBalance()
+            << endl;
+
+        Info<< "Cells: added = " << addedCells_.size()
+            << " modified = " << modifiedCells_.size()
+            << " removed = " << removedCells_.size() - modifiedCells_.size()
+            << " balance = " << cellBalance()
+            << endl;
+    }
+
+    label nErrors = 0;
+
+    // Check points
+
+    if (mesh_.points().size() + pointBalance() < 4)
+    {
+        WarningInFunction
+            << "Less than 4 points in the mesh.  This cannot be a valid mesh."
+            << endl;
+
+        nErrors++;
+    }
+
+    // Collect zone-only and removed points
+    labelHashSet zoneOnlyPoints(removedPoints_);
+
+    forAll (modifiedPoints_, mpI)
+    {
+        if (modifiedPoints_[mpI].inCell())
+        {
+            // Point is live; remove from lookup
+            zoneOnlyPoints.erase
+            (
+                zoneOnlyPoints.find(modifiedPoints_[mpI].pointID())
+            );
+        }
+    }
+
+    forAll (addedPoints_, apI)
+    {
+        if (!addedPoints_[apI].inCell())
+        {
+            zoneOnlyPoints.insert(mesh_.points().size() + apI);
+        }
+    }
+
+    // Check faces
+
+    label nFaceErrors = 0;
+    label nCurFaceError = 0;
+
+    // For all live modified and added faces, check that points are also live
+
+    // Collect zone-only faces
+    labelHashSet zoneOnlyFaces(removedFaces_);
+
+    // Modified faces
+    forAll (modifiedFaces_, mfI)
+    {
+        if (!modifiedFaces_[mfI].onlyInZone())
+        {
+            // Face is live; remove from lookup
+            zoneOnlyFaces.erase
+            (
+                zoneOnlyFaces.find(modifiedFaces_[mfI].faceID())
+            );
+
+            // Count errors in current face
+            nCurFaceError = 0;
+
+            const face& curFace = modifiedFaces_[mfI].newFace();
+
+            forAll (curFace, pointI)
+            {
+                if (zoneOnlyPoints.found(curFace[pointI]))
+                {
+                    nCurFaceError++;
+                }
+            }
+
+            if (nCurFaceError > 0)
+            {
+                if (debug)
+                {
+                    Info<< "Modified face no " << mfI << " is active but uses "
+                        << nCurFaceError << " zone-only or removed points.  "
+                        << "Face: " << curFace << "  Problem points:";
+
+                    forAll (curFace, pointI)
+                    {
+                        if (zoneOnlyPoints.found(curFace[pointI]))
+                        {
+                            Info  << " " << curFace[pointI];
+                        }
+                    }
+
+                    Info << endl;
+                }
+
+                nFaceErrors++;
+            }
+        }
+    }
+
+    // Added faces
+    forAll (addedFaces_, afI)
+    {
+        if (addedFaces_[afI].onlyInZone())
+        {
+            // Zone-only face; add to hash set
+            zoneOnlyFaces.insert(mesh_.faces().size() + afI);
+        }
+        else
+        {
+            // Count errors in current face
+            nCurFaceError = 0;
+
+            const face& curFace = addedFaces_[afI].newFace();
+
+            forAll (curFace, pointI)
+            {
+                if (zoneOnlyPoints.found(curFace[pointI]))
+                {
+                    nCurFaceError++;
+                }
+            }
+
+            if (nCurFaceError > 0)
+            {
+                if (debug)
+                {
+                    Info<< "Added face no " << afI << " is active but uses "
+                        << nCurFaceError << " zone-only or removed points.  "
+                        << "Face: " << curFace << "  Problem points:";
+
+                    forAll (curFace, pointI)
+                    {
+                        if (zoneOnlyPoints.found(curFace[pointI]))
+                        {
+                            Info  << " " << curFace[pointI];
+                        }
+                    }
+
+                    Info << endl;
+                }
+
+                nFaceErrors++;
+            }
+        }
+    }
+
+    // Check cells?
+
+    if (nErrors == 0)
+    {
+        if (debug)
+        {
+            Info << "batchPolyTopoChange OK" << endl;
+        }
+
+        return false;
+    }
+    else
+    {
+        if (debug)
+        {
+            Info<< "bool batchPolyTopoChange::check() const : "
+                << "Detected " << nErrors << " errors."
+                << endl;
+        }
+
+        return true;
+    }
+}
+
+
+void Foam::batchPolyTopoChange::clear()
+{
+    if (debug)
+    {
+        Info<< "void Foam::batchPolyTopoChange::clear() : "
+            << "clearing topological change request" << endl;
+    }
+
+    // Clear all contents
+    addedPoints_.clear();
+    modifiedPoints_.clear();
+    removedPoints_.clear();
+
+    addedFaces_.clear();
+    modifiedFaces_.clear();
+    removedFaces_.clear();
+
+    addedCells_.clear();
+    removedCells_.clear();
+}
+
+
+// ************************************************************************* //

src/meshTools/batchPolyTopoChange/batchPolyTopoChange.H

@@ -0,0 +1,256 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    batchPolyTopoChange
+
+Description
+    Class accumulates information on how to perform mesh refinement.
+    Once the refinement request is completed, polyMesh modifies the mesh
+    topology.
+
+SourceFiles
+    batchPolyTopoChange.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef batchPolyTopoChange_H
+#define batchPolyTopoChange_H
+
+#include "DynamicList.H"
+#include "HashSet.H"
+#include "polyAddPoint.H"
+#include "polyModifyPoint.H"
+#include "polyRemovePoint.H"
+#include "polyAddFace.H"
+#include "polyModifyFace.H"
+#include "polyRemoveFace.H"
+#include "polyAddCell.H"
+#include "polyModifyCell.H"
+#include "polyRemoveCell.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+class polyMesh;
+
+/*---------------------------------------------------------------------------*\
+                       Class batchPolyTopoChange Declaration
+\*---------------------------------------------------------------------------*/
+
+class batchPolyTopoChange
+{
+    // Private data
+
+        //- Reference to mesh to be refined
+        const polyMesh& mesh_;
+
+        //- Points to add
+        DynamicList<polyAddPoint> addedPoints_;
+
+        //- Points to modify
+        DynamicList<polyModifyPoint> modifiedPoints_;
+
+        //- Points to remove
+        labelHashSet removedPoints_;
+
+        //- Faces to add
+        DynamicList<polyAddFace> addedFaces_;
+
+        //- Faces to modify
+        DynamicList<polyModifyFace> modifiedFaces_;
+
+        //- Faces to remove
+        labelHashSet removedFaces_;
+
+        //- Number of cells to add
+        DynamicList<polyAddCell> addedCells_;
+
+        //- Cells to modify
+        DynamicList<polyModifyCell> modifiedCells_;
+
+        //- Cells to remove
+        labelHashSet removedCells_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        batchPolyTopoChange(const batchPolyTopoChange&) = delete;
+
+        //- Disallow default bitwise assignment
+        void operator=(const batchPolyTopoChange&) = delete;
+
+
+    // Private static data
+
+        //- Minimum dynamic list size for object insertion
+        static const label minListSize;
+
+        //- Estimated fraction of removed points
+        static const label pointFraction;
+
+        //- Estimated fraction of removed faces
+        static const label faceFraction;
+
+        //- Estimated fraction of removed cells
+        static const label cellFraction;
+
+
+public:
+
+    //- Runtime type information
+    ClassName("batchPolyTopoChange");
+
+
+    // Constructors
+
+        //- Construct from mesh reference
+        batchPolyTopoChange(const polyMesh&);
+
+
+    //- Destructor
+    ~batchPolyTopoChange() = default;
+
+
+    // Member Functions
+
+        // Definition of topological change
+
+            //- Set topological action
+            label setAction(const topoAction& action);
+
+
+        // Topology morph data
+
+            //- Is point removed?
+            inline bool pointRemoved(const label pointI) const;
+
+            //- Is face removed?
+            inline bool faceRemoved(const label faceI) const;
+
+            //- Is cell removed?
+            inline bool cellRemoved(const label cellI) const;
+
+            //- Point balance (added - removed)
+            label pointBalance() const
+            {
+                return
+                    addedPoints_.size()
+                  + modifiedPoints_.size()
+                  - removedPoints_.size();
+            }
+
+            //- Face balance (added - removed)
+            label faceBalance() const
+            {
+                return
+                    addedFaces_.size()
+                  + modifiedFaces_.size()
+                  - removedFaces_.size();
+            }
+
+            //- Cell balance (added - removed)
+            label cellBalance() const
+            {
+                return addedCells_.size() - removedCells_.size();
+            }
+
+            //- Added points
+            const DynamicList<polyAddPoint>& addedPoints() const
+            {
+                return addedPoints_;
+            }
+
+            //- Modified points
+            const DynamicList<polyModifyPoint>& modifiedPoints() const
+            {
+                return modifiedPoints_;
+            }
+
+            //- Map of removed points
+            const labelHashSet& removedPoints() const
+            {
+                return removedPoints_;
+            }
+
+            //- Added faces
+            const DynamicList<polyAddFace>& addedFaces() const
+            {
+                return addedFaces_;
+            }
+
+            //- Modified faces
+            const DynamicList<polyModifyFace>& modifiedFaces() const
+            {
+                return modifiedFaces_;
+            }
+
+            //- Map of removed faces
+            const labelHashSet& removedFaces() const
+            {
+                return removedFaces_;
+            }
+
+            //- Added cells
+            const DynamicList<polyAddCell>& addedCells() const
+            {
+                return addedCells_;
+            }
+
+            //- Modified cells
+            const DynamicList<polyModifyCell>& modifiedCells() const
+            {
+                return modifiedCells_;
+            }
+
+            //- Map of removed cells
+            const labelHashSet& removedCells() const
+            {
+                return removedCells_;
+            }
+
+            //- Check for consistency and report status
+            //  Returns false for no error.
+            bool check() const;
+
+            //- Clear all contents
+            void clear();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#include "batchPolyTopoChangeI.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/meshTools/batchPolyTopoChange/batchPolyTopoChangeI.H

@@ -0,0 +1,47 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+inline bool Foam::batchPolyTopoChange::pointRemoved(const label pointI) const
+{
+    return removedPoints().found(pointI);
+}
+
+
+inline bool Foam::batchPolyTopoChange::faceRemoved(const label faceI) const
+{
+    return removedFaces().found(faceI);
+}
+
+
+inline bool Foam::batchPolyTopoChange::cellRemoved(const label cellI) const
+{
+    return removedCells().found(cellI);
+}
+
+
+// ************************************************************************* //

src/meshTools/meshTools/meshTools.C

@@ -30,6 +30,7 @@ License
 #include "polyMesh.H"
 #include "hexMatcher.H"
 #include "treeBoundBox.H"
+#include "syncTools.H"
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
@@ -878,4 +879,157 @@ Foam::label Foam::meshTools::cutDirToEdge
 }
 
 
+void Foam::meshTools::setFaceInfo
+(
+    const polyMesh& mesh,
+    const label faceI,
+    label& patchID,
+    label& zoneID,
+    label& zoneFlip
+)
+{
+    patchID = -1;
+
+    if (!mesh.isInternalFace(faceI))
+    {
+        patchID = mesh.boundaryMesh().whichPatch(faceI);
+    }
+
+    zoneID = mesh.faceZones().whichZone(faceI);
+
+    zoneFlip = false;
+
+    if (zoneID > -1)
+    {
+        const faceZone& fZone = mesh.faceZones()[zoneID];
+
+        zoneFlip = fZone.flipMap()[fZone.whichFace(faceI)];
+    }
+}
+
+
+void Foam::meshTools::extendMarkedCellsAcrossFaces
+(
+    const polyMesh& mesh,
+    boolList& markedCell
+)
+{
+    // Mark all faces for all marked cells
+    const label nFaces = mesh.nFaces();
+    boolList markedFace(nFaces, false);
+
+    // Get mesh cells
+    const cellList& meshCells = mesh.cells();
+
+    // Loop through all cells
+    forAll (markedCell, cellI)
+    {
+        if (markedCell[cellI])
+        {
+            // This cell is marked, get its faces
+            const cell& cFaces = meshCells[cellI];
+
+            forAll (cFaces, i)
+            {
+                markedFace[cFaces[i]] = true;
+            }
+        }
+    }
+
+    // Snyc the face list across processor boundaries
+    syncTools::syncFaceList(mesh, markedFace, orEqOp<bool>());//HJ
+
+    // Get necessary mesh data
+    const label nInternalFaces = mesh.nInternalFaces();
+    const labelList& owner = mesh.faceOwner();
+    const labelList& neighbour = mesh.faceNeighbour();
+
+    // Internal faces
+    for (label faceI = 0; faceI < nInternalFaces; ++faceI)
+    {
+        if (markedFace[faceI])
+        {
+            // Face is marked, mark both owner and neighbour
+            const label& own = owner[faceI];
+            const label& nei = neighbour[faceI];
+
+            // Mark owner and neighbour cells
+            markedCell[own] = true;
+            markedCell[nei] = true;
+        }
+    }
+
+    // Boundary faces
+    for (label faceI = nInternalFaces; faceI < nFaces; ++faceI)
+    {
+        if (markedFace[faceI])
+        {
+            // Face is marked, mark owner
+            const label& own = owner[faceI];
+
+            // Mark owner
+            markedCell[own] = true;
+        }
+    }
+}
+
+
+void Foam::meshTools::extendMarkedCellsAcrossPoints
+(
+    const polyMesh& mesh,
+    boolList& markedCell
+)
+{
+    // Mark all points for all marked cells
+    const label nPoints = mesh.nPoints();
+    boolList markedPoint(nPoints, false);
+
+    // Get cell points
+    const labelListList& meshCellPoints = mesh.cellPoints();
+
+    // Loop through all cells
+    forAll (markedCell, cellI)
+    {
+        if (markedCell[cellI])
+        {
+            // This cell is marked, get its points
+            const labelList& cPoints = meshCellPoints[cellI];
+
+            forAll (cPoints, i)
+            {
+                markedPoint[cPoints[i]] = true;
+            }
+        }
+    }
+
+    // Snyc point list across processor boundaries
+    syncTools::syncPointList
+    (
+        mesh,
+        markedPoint,
+        orEqOp<bool>(),
+        true // Default value
+        // true  // Apply separation for parallel cyclics  //HJ
+    );
+
+    // Get point cells
+    const labelListList& meshPointCells = mesh.pointCells();
+
+    // Loop through all points
+    forAll (markedPoint, pointI)
+    {
+        if (markedPoint[pointI])
+        {
+            // This point is marked, mark all of its cells
+            const labelList& pCells = meshPointCells[pointI];
+
+            forAll (pCells, i)
+            {
+                markedCell[pCells[i]] = true;
+            }
+        }
+    }
+}
+
+
 // ************************************************************************* //

src/meshTools/meshTools/meshTools.H

@@ -352,6 +352,37 @@ namespace meshTools
             const vector& cutDir
         );
 
+
+    // Face information
+
+        //- Set face information: patch, zone and zone flip for a face
+        void setFaceInfo
+        (
+            const polyMesh& mesh,
+            const label faceI,
+            label& patchID,
+            label& zoneID,
+            label& zoneFlip
+        );
+
+
+    // Mark-up of mesh bits. Relocated from refinement polyMeshModifier
+
+        //- Extend marked cells across faces given a bool list of already marked
+        //  cells
+        void extendMarkedCellsAcrossFaces
+        (
+            const polyMesh& mesh,
+            boolList& markedCell
+        );
+
+        //- Extend marked cells across points given a bool list of already
+        //  marked cells
+        void extendMarkedCellsAcrossPoints
+        (
+            const polyMesh& mesh,
+            boolList& markedCell
+        );
 } // End namespace meshTools
 
 

src/topoChangerFvMesh/Make/files

@@ -11,4 +11,14 @@ movingConeTopoFvMesh/movingConeTopoFvMesh.C
 mixerFvMesh/mixerFvMesh.C
 */
 
+dynamicPolyRefinementFvMesh/dynamicPolyRefinementFvMesh.C
+dynamicPolyRefinementFvMesh/refinementSelection/refinementSelection/refinementSelection.C
+dynamicPolyRefinementFvMesh/refinementSelection/fieldBoundsRefinement/fieldBoundsRefinement.C
+dynamicPolyRefinementFvMesh/refinementSelection/minCellVolumeRefinement/minCellVolumeRefinement.C
+dynamicPolyRefinementFvMesh/refinementSelection/minCellSizeRefinement/minCellSizeRefinement.C
+dynamicPolyRefinementFvMesh/refinementSelection/minPatchDistanceRefinement/minPatchDistanceRefinement.C
+dynamicPolyRefinementFvMesh/refinementSelection/protectedInitialRefinement/protectedInitialRefinement.C
+dynamicPolyRefinementFvMesh/refinementSelection/minFaceArea2DRefinement/minFaceArea2DRefinement.C
+dynamicPolyRefinementFvMesh/refinementSelection/compositeRefinementSelection/compositeRefinementSelection.C
+
 LIB = $(FOAM_LIBBIN)/libtopoChangerFvMesh

src/topoChangerFvMesh/Make/options

@@ -1,5 +1,6 @@
 EXE_INC = \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
+    -I$(LIB_SRC)/optimisation/adjointOptimisation/adjoint/lnInclude \
     -I$(LIB_SRC)/fileFormats/lnInclude \
     -I$(LIB_SRC)/surfMesh/lnInclude \
     -I$(LIB_SRC)/meshTools/lnInclude \
@@ -8,6 +9,7 @@ EXE_INC = \
 
 LIB_LIBS = \
     -lfiniteVolume \
+    -l adjointOptimisation \
     -lfileFormats \
     -lsurfMesh \
     -lmeshTools \

src/topoChangerFvMesh/dynamicMotionSolverTopoFvMesh/dynamicMotionSolverTopoFvMesh.C

@@ -100,7 +100,7 @@ bool Foam::dynamicMotionSolverTopoFvMesh::update()
     // (TBD: should be in changeMesh if no inflation?)
     moving(false);
     // Do mesh changes (not using inflation - points added directly into mesh)
-    autoPtr<mapPolyMesh> topoChangeMap = topoChanger_.changeMesh(false);
+    autoPtr<mapPolyMesh> topoChangeMap = topoChanger_.changeMesh();
 
     if (topoChangeMap)
     {

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/dynamicMeshDict

@@ -0,0 +1,73 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | foam-extend: Open Source CFD                    |
+|  \\    /   O peration     | Version:     5.0                                |
+|   \\  /    A nd           | Web:         http://www.foam-extend.org         |
+|    \\/     M anipulation  | For copyright notice see file Copyright         |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "constant";
+    object      dynamicMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dynamicFvMesh   dynamicPolyRefinementFvMesh;
+
+dynamicPolyRefinementFvMeshCoeffs
+{
+    // Dynamic mesh procedure controls
+
+    // Refine every refineInterval step
+    refineInterval   1;
+
+    // Unrefine every unrefineInterval step
+    unrefineInterval 1;
+
+    // Separate refinement/unrefinement steps. In case this is switched on,
+    // if both refinement and unrefinement should have been performed in a
+    // single step, unrefinement is skipped. Switched off by default, meaning
+    // that it should be safe to perform both at the same time
+    separateUpdates false;
+
+    // Refinement selection criteria
+    refinementSelection
+    {
+        // Refines all cells with 0.001 < alpha < 0.999, otherwise unrefines
+        // previously refined cells
+        type        fieldBoundsRefinement;
+        fieldName   alpha;
+        lowerBound  0.001;
+        upperBound  0.999;
+
+        // Whether to use cell-point-cell smoothing for selecting refinement
+        // candidates. Off by default
+        cellPointCellSmoothing off;
+    }
+
+    // Polyhedral refinement engine controls
+    active yes;
+
+    // Maximum number of cells to allow (not strictly controlled)
+    maxCells             2000000;
+
+    // Maximum refinement level
+    maxRefinementLevel   3;
+
+    // Number of buffer layers between refinement levels
+    nRefinementBufferLayers        1;
+
+    // Number of buffer layers for unrefinement in order to run away from the
+    // region that is getting refined at the same time in order to avoid point
+    // level inconsistencies
+    nUnrefinementBufferLayers      4;
+
+    // Whether to use edge based consistency check. Needed when one allows more
+    // than 2 refinement levels (automatically switched on)
+    edgeBasedConsistency           yes;
+}
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/dynamicPolyRefinementFvMesh.C

@@ -0,0 +1,366 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "dynamicPolyRefinementFvMesh.H"
+#include "addToRunTimeSelectionTable.H"
+#include "refinementSelection.H"
+#include "prismatic2DRefinement.H"
+#include "polyhedralRefinement.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+defineTypeNameAndDebug(dynamicPolyRefinementFvMesh, 0);
+
+addToRunTimeSelectionTable
+(
+    dynamicFvMesh,
+    dynamicPolyRefinementFvMesh,
+    IOobject
+);
+
+}
+
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+void Foam::dynamicPolyRefinementFvMesh::readDict()
+{
+    // Read and check refinement and unrefinement intervals
+    refineInterval_ = readLabel(refinementDict_.lookup("refineInterval"));
+
+    if (refineInterval_ < 1)
+    {
+        FatalErrorInFunction
+            << "Illegal refineInterval found: " << refineInterval_ << nl
+            << "The refineInterval controls the refinement"
+            << " trigerring within a certain time step and should be > 0"
+            << exit(FatalError);
+    }
+
+    unrefineInterval_ = readLabel(refinementDict_.lookup("unrefineInterval"));
+
+    if (refineInterval_ < 1)
+    {
+        FatalErrorInFunction
+            << "Illegal unrefineInterval found: " << refineInterval_ << nl
+            << "The unrefineInterval controls the unrefinement"
+            << " trigerring within a certain time step and should be > 0"
+            << exit(FatalError);
+    }
+
+    // Read separate updates switch
+    separateUpdates_ =
+        refinementDict_.lookupOrDefault<Switch>("separateUpdates", false);
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::dynamicPolyRefinementFvMesh::dynamicPolyRefinementFvMesh
+(
+    const IOobject& io,
+    const word subDictName
+)
+:
+    topoChangerFvMesh(io),
+    refinementDict_
+    (
+        IOdictionary
+        (
+            IOobject
+            (
+                "dynamicMeshDict",
+                time().constant(),
+                *this,
+                IOobject::MUST_READ,
+                IOobject::NO_WRITE,
+                false
+            )
+        ).subDict(subDictName + "Coeffs")
+    ),
+    refineInterval_(readLabel(refinementDict_.lookup("refineInterval"))),
+    unrefineInterval_(readLabel(refinementDict_.lookup("unrefineInterval"))),
+    separateUpdates_
+    (
+        refinementDict_.lookupOrDefault<Switch>("separateUpdates", false)
+    ),
+    curTimeIndex_(-1),
+
+    // Note: initialize refinement selection algorithm after the refinement
+    // polyMeshModifier has been set. It is possible that the selection
+    // algorithm needs cellLevel and pointLevel (see e.g.
+    // protectedInitialRefinement)
+    refinementSelectionPtr_()
+{
+    // Check whether we read polyMeshModifiers from
+    // constant/polyMesh/meshModifiers file in the base class
+    if (!topoChanger_.empty())
+    {
+        // Already initialized, warn the user that we'll neglect it
+        WarningInFunction
+           << "Using controls from constant/dynamicMeshDict instead of"
+           << " constant/polyMesh/meshModifiers."
+           << nl
+           << "To supress this warning, delete meshModifiers file."
+           << endl;
+
+       // Clear the list
+       topoChanger_.clear();
+    }
+
+    // Only one topo changer engine
+    topoChanger_.setSize(1);
+
+    // Get number of valid geometric dimensions
+    const label nGeometricDirs = this->nGeometricD();
+
+    switch (nGeometricDirs)
+    {
+        case 3:
+            // Add the polyhedralRefinement engine for
+            // 3D isotropic refinement
+            Info<< "3D case detected. "
+                << "Adding polyhedralRefinement topology modifier" << endl;
+            topoChanger_.set
+            (
+                0,
+                new polyhedralRefinement
+                (
+                    "polyhedralRefinement",
+                    refinementDict_,
+                    0,
+                    topoChanger_
+                )
+            );
+            break;
+
+        case 2:
+            // Add the prismatic2DRefinement engine for
+            // 2D isotropic refinement
+            Info<< "2D case detected. "
+                << "Adding prismatic2DRefinement topology modifier" << endl;
+            topoChanger_.set
+            (
+                0,
+                new prismatic2DRefinement
+                (
+                    "prismatic2DRefinement",
+                    refinementDict_,
+                    0,
+                    topoChanger_
+                )
+            );
+            break;
+
+        case 1:
+            FatalErrorInFunction
+                << "1D case detected. No valid refinement strategy is"
+                <<  " available for 1D cases."
+                << abort(FatalError);
+            break;
+
+        default:
+            FatalErrorInFunction
+                << "Invalid number of geometric meshes detected: "
+                << nGeometricDirs
+                << nl << "It appears that this mesh is neither 1D, 2D or 3D."
+                << abort(FatalError);
+
+    }
+
+    // Write mesh and modifiers
+    topoChanger_.writeOpt() = IOobject::AUTO_WRITE;
+    topoChanger_.write();
+    write();
+
+    // Initialize refinement selection algorithm after modifiers
+    refinementSelectionPtr_ = refinementSelection::New(*this, refinementDict_);
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+bool Foam::dynamicPolyRefinementFvMesh::firstUpdate() const
+{
+    return curTimeIndex_ < time().timeIndex();
+}
+
+
+bool Foam::dynamicPolyRefinementFvMesh::update()
+{
+    // Re-read the data from dictionary for on-the-fly changes
+    readDict();
+
+    // Performing refinement/unrefinement when:
+    // 1. We are at the first time step
+    // 2. Only once per time step
+    // 3. Time step is a multiplier of specified refineInterval or
+    //    unrefineInterval
+
+    // Get time index
+    const label timeID = time().timeIndex();
+
+    // Check whether to perform refinement and/or unrefinement
+    const bool performRefinement = timeID % refineInterval_ == 0;
+
+    // Skip performing refinement/unrefinement in the same step if
+    // separateUpdates flag is switched on
+    bool performUnrefinement = timeID % unrefineInterval_ == 0;
+    if (performRefinement && separateUpdates_)
+    {
+        performUnrefinement = false;
+    }
+
+    if
+    (
+        timeID > 0
+     && curTimeIndex_ < timeID
+     && (performRefinement || performUnrefinement)
+    )
+    {
+        // Update current time index to skip multiple topo changes per single
+        // time step
+        curTimeIndex_ = time().timeIndex();
+
+        // Get reference to base class refinement polyMeshModifier
+        refinement& refModifier = refCast<refinement>(topoChanger_[0]);
+
+        // Create empty list for refinement candidates
+        labelList refCandidates;
+
+        // Collect refinement candidates from refinement selection algorithm in
+        // case the refinement should be performed in this time step
+        if (performRefinement)
+        {
+            // Note: return type is Xfer<labelList> so there's no copying (two
+            // transfers are occuring)
+            refCandidates =
+                refinementSelectionPtr_->refinementCellCandidates();
+
+                Info<< "Selected " << refCandidates.size()
+                << " refinement candidates."
+                << endl;
+        }
+        else
+        {
+            Info<< "Skipping refinement for this time-step..." << endl;
+        }
+
+        // Set cells to refine. Note: refinement needs to make sure that face
+        // and point consistent refinement is performed
+        refModifier.setCellsToRefine(refCandidates);
+
+        // Create empty list for unrefinement candidates
+        labelList unrefCandidates;
+
+        // Collect unrefinement candidates from refinement selection algorithm
+        // in case the unrefinement should be performed in this time step
+        if (performUnrefinement)
+        {
+            // Note: return type is Xfer<labelList> so there's no copying (two
+            // transfers are occuring)
+            unrefCandidates =
+                refinementSelectionPtr_->unrefinementPointCandidates();
+
+            Info<< "Selected " << unrefCandidates.size()
+                << " unrefinement candidates."
+                << endl;
+        }
+        else
+        {
+            Info<< "Skipping unrefinement for this time-step..." << endl;
+        }
+
+        // Set split points to unrefine around.
+        // Notes:
+        // 1. refinement needs to make sure that only a consistent set of split
+        //    points is used for unrefinement
+        // 2. Must be called after refinement::setCellsToRefine
+        refModifier.setSplitPointsToUnrefine(unrefCandidates);
+
+        // Activate the polyhedral refinement engine if there are some cells to
+        // refine or there are some split points to unrefine around
+        bool enableTopoChange =
+            !refCandidates.empty() || !unrefCandidates.empty();
+
+        // Note: must enable topo change for all processors since face and point
+        // consistent refinement must be ensured across coupled patches
+        reduce(enableTopoChange, orOp<bool>());
+
+        if (enableTopoChange)
+        {
+            refModifier.enable();
+        }
+        else
+        {
+            refModifier.disable();
+        }
+
+        // Perform refinement and unrefinement in one go
+        autoPtr<mapPolyMesh> topoChangeMap = topoChanger_.changeMesh();
+
+        // Output cell balance if the topo change has been performed
+        const label nOldCells =
+            returnReduce(topoChangeMap->nOldCells(), sumOp<label>());
+        const label sizeCellMap =
+            returnReduce(topoChangeMap->cellMap().size(), sumOp<label>());
+
+        // If the size of cell map is different than zero, we actually performed
+        // some topo changes
+        if (sizeCellMap)
+        {
+            Info<< "Successfully performed polyhedral refinement. "
+                << "Changed from " << nOldCells << " to " << sizeCellMap
+                << " cells." << endl;
+        }
+        else
+        {
+            Info<< "Refinement/unrefinement not performed in this time step "
+                << "since no cells were selected." << endl;
+        }
+
+        return true;
+
+        // Note: OpenFOAM does not have a morphing signalling
+        // return topoChangeMap->morphing();
+    }
+    else
+    {
+        // Update current time index to skip multiple topo change checks
+        // per time step
+        curTimeIndex_ = time().timeIndex();
+    }
+
+    Info<< "No refinement/unrefinement" << endl;
+
+    // No refinement/unrefinement at this time step. Return false
+    return false;
+}
+
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/dynamicPolyRefinementFvMesh.H

@@ -0,0 +1,158 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::dynamicPolyRefinementFvMesh
+
+Description
+    Adaptive mesh refinement for isotropic refinement of arbitrary polyhedral
+    cells in 3D and arbitrary prismatic cells in 2D.
+    Automatically switches between:
+    - 3D refinement uses polyhedralRefinement engine
+    - 2D refinement uses prismatic2DRefinement engine
+
+SourceFiles
+    dynamicPolyRefinementFvMesh.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved
+    Rewrite and updates by Hrvoje Jasak, Wikki Ltd.  All rights reserved
+
+Notes
+    Generalisation and refactorisation of dynamicRefineMesh for polyhedral cells
+    in 3D and prismatic cells in 2D.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef dynamicPolyRefinementFvMesh_H
+#define dynamicPolyRefinementFvMesh_H
+
+#include "topoChangerFvMesh.H"
+#include "refinementSelection.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                Class dynamicPolyRefinementFvMesh Declaration
+\*---------------------------------------------------------------------------*/
+
+class dynamicPolyRefinementFvMesh
+:
+    public topoChangerFvMesh
+{
+protected:
+
+    // Protected data
+
+        //- Dictionary containing dynamic mesh coefficient controls
+        dictionary refinementDict_;
+
+
+private:
+
+    // Private data
+
+        //- Refinement interval
+        label refineInterval_;
+
+        //- Unrefinement interval
+        label unrefineInterval_;
+
+        //- Separate refinement/unrefinement: off by default, meaning that
+        //  refinement and unrefinement can be performed in the same step
+        Switch separateUpdates_;
+
+        //- Current time index (helper variable to skip multiple topo changes in
+        //  a single time step)
+        label curTimeIndex_;
+
+        //- Refinement selection algorithm that has two jobs:
+        //  1. Selects cells to refine from all cells
+        //  2. Selects split points that are ok to refine based on given set of
+        //     all split points
+        autoPtr<refinementSelection> refinementSelectionPtr_;
+
+
+    // Private Member Functions
+
+        //- Helper function for reading the dictionary and updating the data
+        void readDict();
+
+
+        // Copy control
+
+            //- Disallow default bitwise copy construct
+            dynamicPolyRefinementFvMesh
+            (
+                const dynamicPolyRefinementFvMesh&
+            ) = delete;
+
+            //- Disallow default bitwise assignment
+            void operator=(const dynamicPolyRefinementFvMesh&) = delete;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("dynamicPolyRefinementFvMesh");
+
+
+    // Constructors
+
+        //- Construct from IOobject and optional name for the subdictionary
+        //  containing the refinement (and possibly other controls). The second
+        //  parameter is useful if we derive another dynamic mesh class from
+        //  this one instead of topoChangerFvMesh base class. VV, 17/May/2018.
+        dynamicPolyRefinementFvMesh
+        (
+            const IOobject& io,
+            const word subDictName = typeName
+        );
+
+
+    //- Destructor
+    virtual ~dynamicPolyRefinementFvMesh() = default;
+
+
+    // Member Functions
+
+        //- Is this the first update in the current time-step?
+        bool firstUpdate() const;
+
+        //- Update the mesh for topology change
+        virtual bool update();
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/compositeRefinementSelection/compositeRefinementSelection.C

@@ -0,0 +1,206 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#include "compositeRefinementSelection.H"
+#include "addToRunTimeSelectionTable.H"
+#include "volFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+defineTypeNameAndDebug(compositeRefinementSelection, 0);
+addToRunTimeSelectionTable
+(
+    refinementSelection,
+    compositeRefinementSelection,
+    dictionary
+);
+
+}
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::compositeRefinementSelection::compositeRefinementSelection
+(
+    const fvMesh& mesh,
+    const dictionary& dict
+)
+:
+    refinementSelection(mesh, dict),
+    baseRefinementSelections_()
+{
+    // Read basic refinement selections
+    PtrList<entry> baseRefSelectionEntries
+    (
+        coeffDict().lookup("baseRefinementSelections")
+    );
+
+    baseRefinementSelections_.setSize(baseRefSelectionEntries.size());
+
+    forAll (baseRefinementSelections_, brsI)
+    {
+        baseRefinementSelections_.set
+        (
+            brsI,
+            refinementSelection::New
+            (
+                mesh,
+                baseRefSelectionEntries[brsI].dict()
+            )
+        );
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor* * * * * * * * * * * * * * * * //
+
+Foam::compositeRefinementSelection::~compositeRefinementSelection()
+{}
+
+
+// * * * * * * * * * * * * Public Member Functions * * * * * * * * * * * * * //
+
+Foam::labelList
+Foam::compositeRefinementSelection::refinementCellCandidates() const
+{
+    // Final refinement cell candidates are defined as the intersection of all
+    // sets (obtained with different refinement selection algorithms)
+    // In order to define the intersection in a straightforward and efficient
+    // way, we will create a labelField for all cells counting the number of
+    // times this cell has been selected for refinement. If all selection
+    // algorithms have selected the cell, this cell is marked as a final
+    // refinement candidate.
+
+    // Create field counting the number of selections
+    labelField nSelections(mesh().nCells(), 0);
+
+    // Loop through all base refinement selections
+    forAll (baseRefinementSelections_, brsI)
+    {
+        // Get refinement candidates from this base selection algorithm. Note:
+        // list is transferred
+        const labelList curRefCandidates
+        (
+            baseRefinementSelections_[brsI].refinementCellCandidates()
+        );
+
+        // Increment the number of selections for selected cells
+        forAll (curRefCandidates, i)
+        {
+            ++nSelections[curRefCandidates[i]];
+        }
+    }
+
+    // Create storage for collection of final cell candidates. Assume that
+    // one fifth of the cells will be marked to prevent excessive resizing
+    DynamicList<label> refinementCandidates(mesh().nCells()/5);
+
+    // Get number of active selection algorithms
+    const label nBaseSelections = baseRefinementSelections_.size();
+
+    // Loop through all cells and collect final refinement candidates
+    forAll (nSelections, cellI)
+    {
+        if (nSelections[cellI] == nBaseSelections)
+        {
+            // Cell has been marked by all selection algorithms, append it
+            refinementCandidates.append(cellI);
+        }
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(refinementCandidates.size(), sumOp<label>())
+        << " cells as refinement candidates."
+        << endl;
+
+    return refinementCandidates;
+}
+
+
+Foam::labelList
+Foam::compositeRefinementSelection::unrefinementPointCandidates() const
+{
+    // Final unrefinement point candidates are defined as the intersection of
+    // all sets (obtained with different refinement selection algorithms) In
+    // order to define the intersection in a straightforward and efficient way,
+    // we will create a labelField for all points counting the number of times
+    // this point has been selected for unrefinement. If all selection
+    // algorithms have selected the point, this point is marked as a final
+    // unrefinement split point candidate.
+
+    // Create a field counting the number of selections
+    labelField nSelections(mesh().nPoints(), 0);
+
+    // Loop through all base refinement selections
+    forAll (baseRefinementSelections_, brsI)
+    {
+        // Get unrefinement candidates from this base selection algorithm. Note:
+        // list is transferred
+        const labelList curUnrefCandidates
+        (
+            baseRefinementSelections_[brsI].unrefinementPointCandidates()
+        );
+
+        // Increment the number of selections for selected points
+        forAll (curUnrefCandidates, i)
+        {
+            ++nSelections[curUnrefCandidates[i]];
+        }
+    }
+
+    // Create storage for collection of final point candidates. Assume that one
+    // tenth of the points will be marked to prevent excessive resizing
+    DynamicList<label> unrefinementCandidates(mesh().nPoints()/10);
+
+    // Get number of active selection algorithms
+    const label nBaseSelections = baseRefinementSelections_.size();
+
+    // Loop through all points and collect final unrefinement candidates
+    forAll (nSelections, pointI)
+    {
+        if (nSelections[pointI] == nBaseSelections)
+        {
+            // Point has been marked by all selection algorithms, append it
+            unrefinementCandidates.append(pointI);
+        }
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(unrefinementCandidates.size(), sumOp<label>())
+        << " points as unrefinement candidates."
+        << endl;
+
+    return unrefinementCandidates;
+}
+
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/compositeRefinementSelection/compositeRefinementSelection.H

@@ -0,0 +1,112 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::compositeRefinementSelection
+
+Description
+    Selection of refinement cells based on an arbitrary number of combined
+    "basic" selection algorithms.
+
+SourceFiles
+    compositeRefinementSelection.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef compositeRefinementSelection_H
+#define compositeRefinementSelection_H
+
+#include "refinementSelection.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                   Class compositeRefinementSelection Declaration
+\*---------------------------------------------------------------------------*/
+
+class compositeRefinementSelection
+:
+    public refinementSelection
+{
+    // Private data
+
+        //- List of basic refinement selection algorithms
+        PtrList<refinementSelection> baseRefinementSelections_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        compositeRefinementSelection(const compositeRefinementSelection&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const compositeRefinementSelection&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("compositeRefinementSelection");
+
+
+    // Constructors
+
+        //- Construct from components
+        compositeRefinementSelection
+        (
+            const fvMesh& mesh,
+            const dictionary& dict
+        );
+
+
+    //- Destructor
+    virtual ~compositeRefinementSelection();
+
+
+    // Member Functions
+
+        // Selection of refinement/unrefinement candidates
+
+            //- Return transferable list of cells to refine
+            virtual labelList refinementCellCandidates() const;
+
+            //- Return transferable list of split points to unrefine
+            virtual labelList unrefinementPointCandidates() const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/fieldBoundsRefinement/fieldBoundsRefinement.C

@@ -0,0 +1,187 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#include "fieldBoundsRefinement.H"
+#include "addToRunTimeSelectionTable.H"
+#include "volFields.H"
+#include "pointFields.H"
+#include "volPointInterpolation.H"
+#include "pointVolInterpolation.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+defineTypeNameAndDebug(fieldBoundsRefinement, 0);
+addToRunTimeSelectionTable
+(
+    refinementSelection,
+    fieldBoundsRefinement,
+    dictionary
+);
+
+}
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::fieldBoundsRefinement::fieldBoundsRefinement
+(
+    const fvMesh& mesh,
+    const dictionary& dict
+)
+:
+    refinementSelection(mesh, dict),
+    fieldName_(coeffDict().lookup("fieldName")),
+    lowerBound_(readScalar(coeffDict().lookup("lowerBound"))),
+    upperBound_(readScalar(coeffDict().lookup("upperBound"))),
+    cellPointCellSmoothing_
+    (
+        coeffDict().lookupOrDefault<Switch>("cellPointCellSmoothing", false)
+    )
+{}
+
+
+// * * * * * * * * * * * * * * * * Destructor* * * * * * * * * * * * * * * * //
+
+Foam::fieldBoundsRefinement::~fieldBoundsRefinement()
+{}
+
+
+// * * * * * * * * * * * * Public Member Functions * * * * * * * * * * * * * //
+
+Foam::labelList
+Foam::fieldBoundsRefinement::refinementCellCandidates() const
+{
+    // Get the field
+    const volScalarField& vField =
+        mesh().lookupObject<volScalarField>(fieldName_);
+
+    // Create temporary for the field (sharing the reference to volume field)
+    tmp<volScalarField> tvf(vField);
+
+    // Use cell-point-cell interpolation to smooth out the field
+    if (cellPointCellSmoothing_)
+    {
+        // Create volume to point interpolation object
+        const volPointInterpolation& vpi = volPointInterpolation::New(mesh());
+
+        // Interpolate from cell centres to points
+        pointScalarField pField(vpi.interpolate(vField));
+
+        // Create point to volume interpolation object
+        const pointMesh& pMesh = pointMesh::New(mesh());
+        const pointVolInterpolation pvi(pMesh, mesh());
+
+        // Interpolate from points back to cell centres
+        tmp<volScalarField> tInterpolatedVf = pvi.interpolate(pField);
+
+        // Assign to the temporary object
+        tvf = tInterpolatedVf;
+    }
+
+    // Get const reference to (possibly smoothed volume field)
+    const volScalarField& vf = tvf();
+
+    // Create storage for collection of cells. Assume that one in five cells
+    // will be refined to prevent excessive resizing.
+    DynamicList<label> refinementCandidates(Foam::max(100, mesh().nCells()/5));
+
+    // Loop through internal field and collect cells to refine
+    const scalarField& vfIn = vf.internalField();
+
+    forAll (vfIn, cellI)
+    {
+        // Get current cell value
+        const scalar& cellValue = vfIn[cellI];
+
+        if (cellValue > lowerBound_ && cellValue < upperBound_)
+        {
+            // Cell value is within the bounds, append cell for potential
+            // refinement
+            refinementCandidates.append(cellI);
+        }
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(refinementCandidates.size(), sumOp<label>())
+        << " cells as refinement candidates."
+        << endl;
+
+    return refinementCandidates;
+}
+
+
+Foam::labelList
+Foam::fieldBoundsRefinement::unrefinementPointCandidates() const
+{
+    // Get the field
+    const volScalarField& vField =
+        mesh().lookupObject<volScalarField>(fieldName_);
+
+    // Create volume to point interpolation object
+    const volPointInterpolation& vpi = volPointInterpolation::New(mesh());
+
+    // Interpolate the volume field from cell centres to points and get the
+    // internal point field
+    pointScalarField pField(vpi.interpolate(vField));
+    const scalarField& pFieldIn = pField.internalField();
+
+    // Create storage for collection of candidates. Assume that one in ten
+    // mesh points will be unrefined to prevent excessive resizing
+    DynamicList<label> unrefinementCandidates
+    (
+        Foam::max(100, mesh().nPoints()/10)
+    );
+
+    // Loop through all split points and select candidates to unrefine
+    forAll (pField, pointI)
+    {
+        // Get point value
+        const scalar pointValue = pFieldIn[pointI];
+
+        if (pointValue > upperBound_ || pointValue < lowerBound_)
+        {
+            // Point value is outside of bounds, append point for potential
+            // unrefinement
+            unrefinementCandidates.append(pointI);
+        }
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(unrefinementCandidates.size(), sumOp<label>())
+        << " points as unrefinement candidates."
+        << endl;
+
+    return unrefinementCandidates;
+}
+
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/fieldBoundsRefinement/fieldBoundsRefinement.H

@@ -0,0 +1,120 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::fieldBoundsRefinement
+
+Description
+    Selection of refinement cells based on a given scalar field bounds:
+    if a given (scalar) field is between lowerBound and upperBound, cell will
+    be marked for refinement.
+
+SourceFiles
+    fieldBoundsRefinement.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef fieldBoundsRefinement_H
+#define fieldBoundsRefinement_H
+
+#include "refinementSelection.H"
+#include "Switch.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                   Class fieldBoundsRefinement Declaration
+\*---------------------------------------------------------------------------*/
+
+class fieldBoundsRefinement
+:
+    public refinementSelection
+{
+    // Private data
+
+        //- Name of the field to refine
+        word fieldName_;
+
+        //- Lower bound for the field
+        scalar lowerBound_;
+
+        //- Upper bound for the field
+        scalar upperBound_;
+
+        //- Whether to use cell-point-cell interpolation to smooth out the field
+        //  before selection. Switched off by default
+        Switch cellPointCellSmoothing_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        fieldBoundsRefinement(const fieldBoundsRefinement&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const fieldBoundsRefinement&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("fieldBoundsRefinement");
+
+
+    // Constructors
+
+        //- Construct from components
+        fieldBoundsRefinement(const fvMesh& mesh, const dictionary& dict);
+
+
+    //- Destructor
+    virtual ~fieldBoundsRefinement();
+
+
+    // Member Functions
+
+        // Selection of refinement/unrefinement candidates
+
+            //- Return transferable list of cells to refine
+            virtual labelList refinementCellCandidates() const;
+
+            //- Return transferable list of split points to unrefine
+            virtual labelList unrefinementPointCandidates() const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/minCellSizeRefinement/minCellSizeRefinement.C

@@ -0,0 +1,125 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#include "minCellSizeRefinement.H"
+#include "addToRunTimeSelectionTable.H"
+#include "volFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+defineTypeNameAndDebug(minCellSizeRefinement, 0);
+addToRunTimeSelectionTable
+(
+    refinementSelection,
+    minCellSizeRefinement,
+    dictionary
+);
+
+}
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::minCellSizeRefinement::minCellSizeRefinement
+(
+    const fvMesh& mesh,
+    const dictionary& dict
+)
+:
+    refinementSelection(mesh, dict),
+    minDelta_(readScalar(coeffDict().lookup("minCellSize")))
+{}
+
+
+// * * * * * * * * * * * * * * * * Destructor* * * * * * * * * * * * * * * * //
+
+Foam::minCellSizeRefinement::~minCellSizeRefinement()
+{}
+
+
+// * * * * * * * * * * * * Public Member Functions * * * * * * * * * * * * * //
+
+Foam::labelList
+Foam::minCellSizeRefinement::refinementCellCandidates() const
+{
+    // Get cell sizes: cube root of cell volume (assuming cube cells)
+    const scalarField cellSize(pow(mesh().V().field(), 1.0/3.0));
+
+    // Create storage for collection of cells. Assume that almost all of the
+    // cells will be marked to prevent excessive resizing.
+    DynamicList<label> refinementCandidates(mesh().nCells());
+
+    // Loop through cells and collect refinement candidates
+    forAll (cellSize, cellI)
+    {
+        if (cellSize[cellI] > minDelta_)
+        {
+            // Cell is larger than the specified minimum, append cell for
+            // potential refinement
+            refinementCandidates.append(cellI);
+        }
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(refinementCandidates.size(), sumOp<label>())
+        << " cells as refinement candidates."
+        << endl;
+
+    return refinementCandidates;
+}
+
+
+Foam::labelList
+Foam::minCellSizeRefinement::unrefinementPointCandidates() const
+{
+    // Mark all points as unrefinement candidates since only split points may be
+    // considered for actual unrefinement and since this refinement criterion
+    // will be usually used in combination with others. VV, 15/Mar/2018.
+
+    // All points are unrefinement candidates
+    labelList unrefinementCandidates(mesh().nPoints());
+
+    forAll (unrefinementCandidates, pointI)
+    {
+        unrefinementCandidates[pointI] = pointI;
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(unrefinementCandidates.size(), sumOp<label>())
+        << " points as unrefinement candidates."
+        << endl;
+
+    return unrefinementCandidates;
+}
+
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/minCellSizeRefinement/minCellSizeRefinement.H

@@ -0,0 +1,110 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::minCellSizeRefinement
+
+Description
+    Selection of refinement cells based on a minimum cell size. Assumes that
+    cells are mostly cubic and compares the minimum cell size with V^1/3, where
+    V is the cell volume. If the cell size is larger than the specified one,
+    cell gets selected for refinement.
+
+SourceFiles
+    minCellSizeRefinement.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef minCellSizeRefinement_H
+#define minCellSizeRefinement_H
+
+#include "refinementSelection.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                   Class minCellSizeRefinement Declaration
+\*---------------------------------------------------------------------------*/
+
+class minCellSizeRefinement
+:
+    public refinementSelection
+{
+    // Private data
+
+        //- Minimum cell size
+        scalar minDelta_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        minCellSizeRefinement(const minCellSizeRefinement&) = delete;
+
+        //- Disallow default bitwise assignment
+        void operator=(const minCellSizeRefinement&) = delete;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("minCellSizeRefinement");
+
+
+    // Constructors
+
+        //- Construct from components
+        minCellSizeRefinement(const fvMesh& mesh, const dictionary& dict);
+
+
+    //- Destructor
+    virtual ~minCellSizeRefinement();
+
+
+    // Member Functions
+
+        // Selection of refinement/unrefinement candidates
+
+            //- Return transferable list of cells to refine
+            virtual labelList refinementCellCandidates() const;
+
+            //- Return transferable list of split points to unrefine
+            virtual labelList unrefinementPointCandidates() const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/minCellVolumeRefinement/minCellVolumeRefinement.C

@@ -0,0 +1,125 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#include "minCellVolumeRefinement.H"
+#include "addToRunTimeSelectionTable.H"
+#include "volFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+defineTypeNameAndDebug(minCellVolumeRefinement, 0);
+addToRunTimeSelectionTable
+(
+    refinementSelection,
+    minCellVolumeRefinement,
+    dictionary
+);
+
+}
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::minCellVolumeRefinement::minCellVolumeRefinement
+(
+    const fvMesh& mesh,
+    const dictionary& dict
+)
+:
+    refinementSelection(mesh, dict),
+    minCellV_(readScalar(coeffDict().lookup("minCellVolume")))
+{}
+
+
+// * * * * * * * * * * * * * * * * Destructor* * * * * * * * * * * * * * * * //
+
+Foam::minCellVolumeRefinement::~minCellVolumeRefinement()
+{}
+
+
+// * * * * * * * * * * * * Public Member Functions * * * * * * * * * * * * * //
+
+Foam::labelList
+Foam::minCellVolumeRefinement::refinementCellCandidates() const
+{
+    // Get mesh volumes
+    const scalarField& cellV = mesh().V().field();
+
+    // Create storage for collection of cells. Assume that almost all of the
+    // cells will be marked to prevent excessive resizing.
+    DynamicList<label> refinementCandidates(mesh().nCells());
+
+    // Loop through cells and collect refinement candidates
+    forAll (cellV, cellI)
+    {
+        if (cellV[cellI] > minCellV_)
+        {
+            // Cell is larger than the specified minimum, append cell for
+            // potential refinement
+            refinementCandidates.append(cellI);
+        }
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(refinementCandidates.size(), sumOp<label>())
+        << " cells as refinement candidates."
+        << endl;
+
+    return refinementCandidates;
+}
+
+
+Foam::labelList
+Foam::minCellVolumeRefinement::unrefinementPointCandidates() const
+{
+    // Mark all points as unrefinement candidates since only split points may be
+    // considered for actual unrefinement and since this refinement criterion
+    // will be usually used in combination with others. VV, 15/Mar/2018.
+
+    // All points are unrefinement candidates
+    labelList unrefinementCandidates(mesh().nPoints());
+
+    forAll (unrefinementCandidates, pointI)
+    {
+        unrefinementCandidates[pointI] = pointI;
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(unrefinementCandidates.size(), sumOp<label>())
+        << " points as unrefinement candidates."
+        << endl;
+
+    return unrefinementCandidates;
+}
+
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/minCellVolumeRefinement/minCellVolumeRefinement.H

@@ -0,0 +1,108 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::minCellVolumeRefinement
+
+Description
+    Selection of refinement cells based on a minimum cell volume. All cells
+    with volume larger than specified minimum get selected.
+
+SourceFiles
+    minCellVolumeRefinement.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef minCellVolumeRefinement_H
+#define minCellVolumeRefinement_H
+
+#include "refinementSelection.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                   Class minCellVolumeRefinement Declaration
+\*---------------------------------------------------------------------------*/
+
+class minCellVolumeRefinement
+:
+    public refinementSelection
+{
+    // Private data
+
+        //- Minimum cell volume
+        scalar minCellV_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        minCellVolumeRefinement(const minCellVolumeRefinement&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const minCellVolumeRefinement&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("minCellVolumeRefinement");
+
+
+    // Constructors
+
+        //- Construct from components
+        minCellVolumeRefinement(const fvMesh& mesh, const dictionary& dict);
+
+
+    //- Destructor
+    virtual ~minCellVolumeRefinement();
+
+
+    // Member Functions
+
+        // Selection of refinement/unrefinement candidates
+
+            //- Return transferable list of cells to refine
+            virtual labelList refinementCellCandidates() const;
+
+            //- Return transferable list of split points to unrefine
+            virtual labelList unrefinementPointCandidates() const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/minFaceArea2DRefinement/minFaceArea2DRefinement.C

@@ -0,0 +1,200 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#include "minFaceArea2DRefinement.H"
+#include "addToRunTimeSelectionTable.H"
+#include "volFields.H"
+#include "emptyPolyPatch.H"
+#include "wedgePolyPatch.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+defineTypeNameAndDebug(minFaceArea2DRefinement, 0);
+addToRunTimeSelectionTable
+(
+    refinementSelection,
+    minFaceArea2DRefinement,
+    dictionary
+);
+
+}
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::minFaceArea2DRefinement::minFaceArea2DRefinement
+(
+    const fvMesh& mesh,
+    const dictionary& dict
+)
+:
+    refinementSelection(mesh, dict),
+    minFaceA_(readScalar(coeffDict().lookup("minFaceArea")))
+{
+    // It is an error to use this selection algorithm for 3D or 1D cases
+    if (mesh.nGeometricD() != 2)
+    {
+        FatalErrorIn
+        (
+            "minFaceArea2DRefinement::minFaceArea2DRefinement"
+            "\n("
+            "\n    const fvMesh& mesh,"
+            "\n    const dictionary& dict,"
+            "\n)"
+        )   << "You are trying to use minFaceArea2DRefinement selection"
+            << " algorithm for a case which is not 2D case."
+            << nl
+            << "This is not allowed."
+            << abort(FatalError);
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor* * * * * * * * * * * * * * * * //
+
+Foam::minFaceArea2DRefinement::~minFaceArea2DRefinement()
+{}
+
+
+// * * * * * * * * * * * * Public Member Functions * * * * * * * * * * * * * //
+
+Foam::labelList
+Foam::minFaceArea2DRefinement::refinementCellCandidates() const
+{
+    // Get face areas (from polyMesh)
+    const scalarField faceArea(mag(mesh().faceAreas()));
+
+    // Mark empty or wedge faces
+    boolList faceOnEmptyPatch(mesh().nFaces(), false);
+
+    // Loop through all patches
+    const polyBoundaryMesh& bMesh = mesh().boundaryMesh();
+    forAll (bMesh, patchI)
+    {
+        const polyPatch& curPatch = bMesh[patchI];
+
+        if (isA<emptyPolyPatch>(curPatch) || isA<wedgePolyPatch>(curPatch))
+        {
+            // Faces on this patch need to be marked
+            const label startFaceI = curPatch.start();
+            const label endFaceI = startFaceI + curPatch.size();
+
+            // Loop through all the faces and marke them
+            for (label faceI = startFaceI; faceI < endFaceI; ++faceI)
+            {
+                faceOnEmptyPatch[faceI] = true;
+            }
+        }
+    }
+
+
+    // Create field that contains maximum face area on empty patch per cell
+    scalarField maxEmptyPatchFaceArea(mesh().nCells(), 0.0);
+
+    // Get cells from the mesh
+    const cellList& cells = mesh().cells();
+
+    forAll (cells, cellI)
+    {
+        // Get current cell
+        const cell& cellFaces = cells[cellI];
+
+        // Loop through faces of the cell
+        forAll (cellFaces, i)
+        {
+            // Get face index
+            const label& faceI = cellFaces[i];
+
+            if (faceOnEmptyPatch[faceI])
+            {
+                // This face is on empty patch, set maximum face area to the new
+                // value if it's larger than the old value
+                maxEmptyPatchFaceArea[cellI] =
+                    max
+                    (
+                        maxEmptyPatchFaceArea[cellI],
+                        faceArea[faceI]
+                    );
+            }
+        }
+    }
+
+
+    // Create storage for collection of cells. Assume that almost all of the
+    // cells will be marked to prevent excessive resizing.
+    DynamicList<label> refinementCandidates(mesh().nCells());
+
+    // Loop through cells and collect refinement candidates
+    forAll (maxEmptyPatchFaceArea, cellI)
+    {
+        if (maxEmptyPatchFaceArea[cellI] > minFaceA_)
+        {
+            // Face area on empty patch is larger than the specified minimum,
+            // append cell for potential refinement
+            refinementCandidates.append(cellI);
+        }
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(refinementCandidates.size(), sumOp<label>())
+        << " cells as refinement candidates."
+        << endl;
+
+    return refinementCandidates;
+}
+
+
+Foam::labelList
+Foam::minFaceArea2DRefinement::unrefinementPointCandidates() const
+{
+    // Mark all points as unrefinement candidates since only split points may be
+    // considered for actual unrefinement and since this refinement criterion
+    // will be usually used in combination with others. VV, 4/Sep/2018.
+
+    // All points are unrefinement candidates
+    labelList unrefinementCandidates(mesh().nPoints());
+
+    forAll (unrefinementCandidates, pointI)
+    {
+        unrefinementCandidates[pointI] = pointI;
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(unrefinementCandidates.size(), sumOp<label>())
+        << " points as unrefinement candidates."
+        << endl;
+
+    return unrefinementCandidates;
+}
+
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/minFaceArea2DRefinement/minFaceArea2DRefinement.H

@@ -0,0 +1,111 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::minFaceArea2DRefinement
+
+Description
+    Selection of refinement cells based on a minimum face area of empty (or
+    wedge) patches. All cells containing a face on empty (or wedge) patch larger
+    than specified minimum area get selected.
+
+    Useful as a 2D substitute for minCellVolume selection for wedge geometries.
+
+SourceFiles
+    minFaceArea2DRefinement.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef minFaceArea2DRefinement_H
+#define minFaceArea2DRefinement_H
+
+#include "refinementSelection.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                   Class minFaceArea2DRefinement Declaration
+\*---------------------------------------------------------------------------*/
+
+class minFaceArea2DRefinement
+:
+    public refinementSelection
+{
+    // Private data
+
+        //- Minimum face area on empty (or wedge) patches
+        scalar minFaceA_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        minFaceArea2DRefinement(const minFaceArea2DRefinement&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const minFaceArea2DRefinement&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("minFaceArea2DRefinement");
+
+
+    // Constructors
+
+        //- Construct from components
+        minFaceArea2DRefinement(const fvMesh& mesh, const dictionary& dict);
+
+
+    //- Destructor
+    virtual ~minFaceArea2DRefinement();
+
+
+    // Member Functions
+
+        // Selection of refinement/unrefinement candidates
+
+            //- Return transferable list of cells to refine
+            virtual labelList refinementCellCandidates() const;
+
+            //- Return transferable list of split points to unrefine
+            virtual labelList unrefinementPointCandidates() const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/minPatchDistanceRefinement/minPatchDistanceRefinement.C

@@ -0,0 +1,154 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#include "minPatchDistanceRefinement.H"
+#include "addToRunTimeSelectionTable.H"
+#include "volFields.H"
+#include "patchWave.H"
+#include "polyPatchID.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+defineTypeNameAndDebug(minPatchDistanceRefinement, 0);
+addToRunTimeSelectionTable
+(
+    refinementSelection,
+    minPatchDistanceRefinement,
+    dictionary
+);
+
+}
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::minPatchDistanceRefinement::minPatchDistanceRefinement
+(
+    const fvMesh& mesh,
+    const dictionary& dict
+)
+:
+    refinementSelection(mesh, dict),
+    minPatchDistance_(readScalar(coeffDict().lookup("minPatchDistance")))
+{}
+
+
+// * * * * * * * * * * * * * * * * Destructor* * * * * * * * * * * * * * * * //
+
+Foam::minPatchDistanceRefinement::~minPatchDistanceRefinement()
+{}
+
+
+// * * * * * * * * * * * * Public Member Functions * * * * * * * * * * * * * //
+
+Foam::labelList
+Foam::minPatchDistanceRefinement::refinementCellCandidates() const
+{
+    // Note: recalculate distance every time due to probable topo changes
+
+    // Read patch names from dictionary
+    const wordList patchNames(coeffDict().lookup("distancePatches"));
+
+    // Collect patchIDs into a hash set
+    labelHashSet patchIDs(patchNames.size());
+    forAll (patchNames, patchI)
+    {
+        // Get polyPatchID
+        const polyPatchID pID(patchNames[patchI], mesh().boundaryMesh());
+
+        if (pID.active())
+        {
+            patchIDs.insert(pID.index());
+        }
+        else
+        {
+            FatalIOErrorInFunction(coeffDict())
+                << "Cannot find patch " << patchNames[patchI]
+                << " in the mesh." << nl
+                << "Available patches are: " << mesh().boundaryMesh().names()
+                << abort(FatalIOError);
+        }
+    }
+
+    // Calculate distance from specified patches and do not correct for accurate
+    // near wall distance (false argument)
+    patchWave waveDistance(mesh(), patchIDs, false);
+    const scalarField& patchDistance = waveDistance.distance();
+
+    // Create storage for collection of cells. Assume that almost all of the
+    // cells will be marked to prevent excessive resizing.
+    DynamicList<label> refinementCandidates(mesh().nCells());
+
+    // Loop through cells and collect refinement candidates
+    forAll (patchDistance, cellI)
+    {
+        if (patchDistance[cellI] > minPatchDistance_)
+        {
+            // Cell is far from the patches, append it for potential refinement
+            refinementCandidates.append(cellI);
+        }
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(refinementCandidates.size(), sumOp<label>())
+        << " cells as refinement candidates."
+        << endl;
+
+    return refinementCandidates;
+}
+
+
+Foam::labelList
+Foam::minPatchDistanceRefinement::unrefinementPointCandidates() const
+{
+    // Mark all points as unrefinement candidates since only split points may be
+    // considered for actual unrefinement and since this refinement criterion
+    // will be usually used in combination with others. VV, 15/Mar/2018.
+
+    // All points are unrefinement candidates
+    labelList unrefinementCandidates(mesh().nPoints());
+
+    forAll (unrefinementCandidates, pointI)
+    {
+        unrefinementCandidates[pointI] = pointI;
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(unrefinementCandidates.size(), sumOp<label>())
+        << " points as unrefinement candidates."
+        << endl;
+
+    return unrefinementCandidates;
+}
+
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/minPatchDistanceRefinement/minPatchDistanceRefinement.H

@@ -0,0 +1,108 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::minPatchDistanceRefinement
+
+Description
+    Selection of refinement cells based on a minimum distance from a set of
+    patches. All cells farther away from the minimum distance get selected.
+
+SourceFiles
+    minPatchDistanceRefinement.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef minPatchDistanceRefinement_H
+#define minPatchDistanceRefinement_H
+
+#include "refinementSelection.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                   Class minPatchDistanceRefinement Declaration
+\*---------------------------------------------------------------------------*/
+
+class minPatchDistanceRefinement
+:
+    public refinementSelection
+{
+    // Private data
+
+        //- Minimum distance to patch
+        scalar minPatchDistance_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        minPatchDistanceRefinement(const minPatchDistanceRefinement&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const minPatchDistanceRefinement&);
+
+
+public:
+
+    //- Runtime type information
+    TypeName("minPatchDistanceRefinement");
+
+
+    // Constructors
+
+        //- Construct from components
+        minPatchDistanceRefinement(const fvMesh& mesh, const dictionary& dict);
+
+
+    //- Destructor
+    virtual ~minPatchDistanceRefinement();
+
+
+    // Member Functions
+
+        // Selection of refinement/unrefinement candidates
+
+            //- Return transferable list of cells to refine
+            virtual labelList refinementCellCandidates() const;
+
+            //- Return transferable list of split points to unrefine
+            virtual labelList unrefinementPointCandidates() const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/protectedInitialRefinement/protectedInitialRefinement.C

@@ -0,0 +1,224 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#include "protectedInitialRefinement.H"
+#include "labelIOField.H"
+#include "zeroGradientFvPatchFields.H"
+#include "addToRunTimeSelectionTable.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+defineTypeNameAndDebug(protectedInitialRefinement, 0);
+addToRunTimeSelectionTable
+(
+    refinementSelection,
+    protectedInitialRefinement,
+    dictionary
+);
+
+}
+
+// * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
+
+Foam::tmp<Foam::volScalarField>
+Foam::protectedInitialRefinement::cellLevelAsField() const
+{
+    // Get cell level
+    const labelIOField& cLevel = mesh().lookupObject<labelIOField>("cellLevel");
+
+    // Create cell level field as volScalarField
+    tmp<volScalarField> tcellLevelField
+    (
+        new volScalarField
+        (
+            IOobject
+            (
+                "cellLevel",
+                mesh().time().timeName(),
+                mesh(),
+                IOobject::NO_READ,
+                IOobject::NO_WRITE
+            ),
+            mesh(),
+            dimensionedScalar("zero", dimless, 0.0),
+            zeroGradientFvPatchScalarField::typeName
+        )
+    );
+
+    scalarField& cellLevelFieldIn = tcellLevelField->internalFieldRef();
+
+    // Set the field
+    forAll (cLevel, cellI)
+    {
+        cellLevelFieldIn[cellI] = cLevel[cellI];
+    }
+    tcellLevelField->correctBoundaryConditions();
+
+    return tcellLevelField;
+}
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::protectedInitialRefinement::protectedInitialRefinement
+(
+    const fvMesh& mesh,
+    const dictionary& dict
+)
+:
+    refinementSelection(mesh, dict),
+    initialCellLevel_
+    (
+        IOobject
+        (
+            "initialCellLevel",
+            mesh.time().timeName(),
+            mesh,
+            IOobject::READ_IF_PRESENT,
+            IOobject::AUTO_WRITE
+        ),
+        cellLevelAsField()()
+    ),
+    // Note: conversion from label to scalar
+    minProtectedLevel_
+    (
+        coeffDict().lookupOrDefault<label>("minProtectedLevel", 0)
+    )
+{
+    Info<< "Will not allow initial refinement below level: "
+        << minProtectedLevel_ << endl;
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor* * * * * * * * * * * * * * * * //
+
+Foam::protectedInitialRefinement::~protectedInitialRefinement()
+{}
+
+
+// * * * * * * * * * * * * Public Member Functions * * * * * * * * * * * * * //
+
+Foam::labelList
+Foam::protectedInitialRefinement::refinementCellCandidates() const
+{
+    // All cells are candidates for refinement
+    labelList refinementCandidates(mesh().nCells());
+    forAll (refinementCandidates, cellI)
+    {
+        refinementCandidates[cellI] = cellI;
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(refinementCandidates.size(), sumOp<label>())
+        << " (all) cells as refinement candidates."
+        << endl;
+
+    return refinementCandidates;
+}
+
+
+Foam::labelList
+Foam::protectedInitialRefinement::unrefinementPointCandidates() const
+{
+    // Create mark-up field for points that are found on initially refined cells
+    // Note: this can be done more intelligently by either cacheing until load
+    // balancing actually occurs or holding pointLevel as data member and
+    // updating it on load balancing. The overall overhead compared to AMR and
+    // DLB is really small, so there's no need to worry about this yet.
+    // VV, 10/July/2018
+    boolList pointsOnRefinedCells(mesh().nPoints(), false);
+
+    // Get initial cell level and mesh data
+    const scalarField& initialCellLevelIn = initialCellLevel_.internalField();
+    const labelListList& meshCellPoints = mesh().cellPoints();
+
+    // Loop through all cells and count number of protected points
+    label nProtectedPoints = 0;
+
+    // Get current cell level
+    const labelIOField& curCellLevel =
+        mesh().lookupObject<labelIOField>("cellLevel");
+
+    forAll (initialCellLevelIn, cellI)
+    {
+        const scalar& cl = initialCellLevelIn[cellI];
+        const scalar& curcl = curCellLevel[cellI];
+
+        if
+        (
+            (cl > SMALL)
+         && (curcl - minProtectedLevel_ < 0.5)
+        )
+        {
+            // Cell has been refined during meshing and the original level is
+            // equal to the current level, mark all of its points
+            const labelList& curCellPoints = meshCellPoints[cellI];
+
+            forAll (curCellPoints, i)
+            {
+                // Get marker for this point
+                bool& ptOnRefCell = pointsOnRefinedCells[curCellPoints[i]];
+
+                if (!ptOnRefCell)
+                {
+                    // This points has not been marked yet, mark it and
+                    // increment the counter for protected points
+                    ptOnRefCell = true;
+                    ++nProtectedPoints;
+                }
+            }
+        }
+    }
+
+    // Create the list for unrefinement candidates
+    labelList unrefinementCandidates(mesh().nPoints() - nProtectedPoints);
+    label nUnrefPoints = 0;
+
+    forAll (pointsOnRefinedCells, pointI)
+    {
+        if (!pointsOnRefinedCells[pointI])
+        {
+            // This point is an unrefinement candidate, set it and increment
+            unrefinementCandidates[nUnrefPoints++] = pointI;
+        }
+    }
+
+    // Print out some information
+    Info<< "Selection algorithm " << type() << " selected "
+        << returnReduce(unrefinementCandidates.size(), sumOp<label>())
+        << " points as unrefinement candidates."
+        << endl;
+
+    return unrefinementCandidates;
+}
+
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/protectedInitialRefinement/protectedInitialRefinement.H

@@ -0,0 +1,130 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::protectedInitialRefinement
+
+Description
+    This refinement strategy is just a protection to avoid unrefining cells that
+    are refined during the snappyHexMesh meshing process. It's intended use is
+    alongside some other refinement strategy as a part of a composite scheme.
+    Therefore: refinementCellCandidates returns all cells as refinement
+    candidates, while unrefinementPointCandidates returns all points that don't
+    touch any of the initially refined cells.
+
+    Since snappyHexMesh writes down cellLevel and pointLevel, cells refined in
+    during meshing could be unrefined, but this is not what we would like to
+    achieve (after all, if we have included refinement regions in meshing, then
+    we probably had a good reason for it).
+
+SourceFiles
+    protectedInitialRefinement.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef protectedInitialRefinement_H
+#define protectedInitialRefinement_H
+
+#include "refinementSelection.H"
+#include "volFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                 Class protectedInitialRefinement Declaration
+\*---------------------------------------------------------------------------*/
+
+class protectedInitialRefinement
+:
+    public refinementSelection
+{
+    // Private data
+
+        //- Initial cellLevel as volScalarField in order to simplify data
+        //  transfer for dynamic load balancing
+        volScalarField initialCellLevel_;
+
+        //- Minimum refinement level to protect
+        scalar minProtectedLevel_;
+
+
+    // Private Member Functions
+
+        // Copy control
+
+            //- Disallow default bitwise copy construct
+            protectedInitialRefinement(const protectedInitialRefinement&);
+
+            //- Disallow default bitwise assignment
+            void operator=(const protectedInitialRefinement&);
+
+
+        // Constructor helper
+
+            //- Create and return volScalarField from cellLevel
+            tmp<volScalarField> cellLevelAsField() const;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("protectedInitialRefinement");
+
+
+    // Constructors
+
+        //- Construct from components
+        protectedInitialRefinement(const fvMesh& mesh, const dictionary& dict);
+
+
+    //- Destructor
+    virtual ~protectedInitialRefinement();
+
+
+    // Member Functions
+
+        // Selection of refinement/unrefinement candidates
+
+            //- Return transferable list of cells to refine
+            virtual labelList refinementCellCandidates() const;
+
+            //- Return transferable list of split points to unrefine
+            virtual labelList unrefinementPointCandidates() const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/refinementSelection/refinementSelection.C

@@ -0,0 +1,87 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#include "refinementSelection.H"
+#include "fvMesh.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+defineTypeNameAndDebug(refinementSelection, 0);
+defineRunTimeSelectionTable(refinementSelection, dictionary);
+
+}
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::refinementSelection::refinementSelection
+(
+    const fvMesh& mesh,
+    const dictionary& dict
+)
+:
+    mesh_(mesh),
+    coeffDict_(dict.subDict("refinementSelection"))
+{}
+
+
+// * * * * * * * * * * * * * * * * * Selectors * * * * * * * * * * * * * * * //
+
+Foam::autoPtr<Foam::refinementSelection> Foam::refinementSelection::New
+(
+    const fvMesh& mesh,
+    const dictionary& dict
+)
+{
+    // Get subdictionary from the dictionary
+    const dictionary coeffDict(dict.subDict("refinementSelection"));
+
+    // Get the name of the desired refinement selection algorithm
+    const word refinementSelectionTypeName(coeffDict.lookup("type"));
+    Info<< "Creating refinementSelection " << refinementSelectionTypeName << endl;
+
+    auto* ctorPtr =
+        dictionaryConstructorTable(refinementSelectionTypeName);
+
+    if (!ctorPtr)
+    {
+        FatalErrorInLookup
+        (
+            "refinementSelection",
+            refinementSelectionTypeName,
+            *dictionaryConstructorTablePtr_
+        ) << exit(FatalError);
+    }
+
+    return autoPtr<refinementSelection>(ctorPtr(mesh, dict));
+}
+
+
+// ************************************************************************* //

src/topoChangerFvMesh/dynamicPolyRefinementFvMesh/refinementSelection/refinementSelection/refinementSelection.H

@@ -0,0 +1,171 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | foam-extend: Open Source CFD
+   \\    /   O peration     | Version:     5.0
+    \\  /    A nd           | Web:         http://www.foam-extend.org
+     \\/     M anipulation  | For copyright notice see file Copyright
+-------------------------------------------------------------------------------
+License
+    This file is part of foam-extend.
+
+    foam-extend 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.
+
+    foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::refinementSelection
+
+Description
+    An abstract base class for providing an interface for refinement selection
+    algorithms. The interface provides two functionalities:
+
+    1. Selects candidate cells to refine based on chosen criteria through
+       refinementCellCandidates() member function. Returns a list of all cells
+       that satisfy given criteria,
+    2. Selects candidate split points to unrefine based on chosen criteria
+       through unrefinementPointCandidates() member function. Returns a list of
+       all points (not just split points!) that satisfy the criteria.
+
+    Note: Here, we do not check that the unrefinement point candidates do not
+    clash the points of cells marked as candidates for refinement. This is taken
+    care of in polyhedralRefinement class.
+
+SourceFiles
+    refinementSelection.C
+
+Author
+    Vuko Vukcevic, Wikki Ltd.  All rights reserved.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef refinementSelection_H
+#define refinementSelection_H
+
+#include "dictionary.H"
+#include "labelList.H"
+#include "autoPtr.H"
+#include "runTimeSelectionTables.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// Forward declaration of classes
+class fvMesh;
+
+/*---------------------------------------------------------------------------*\
+                   Class refinementSelection Declaration
+\*---------------------------------------------------------------------------*/
+
+class refinementSelection
+{
+    // Private data
+
+        //- Const reference to fvMesh
+        const fvMesh& mesh_;
+
+        //- Refinement selection dictionary (subdictionary of
+        //  dynamicPolyRefinementFvMeshCoeffs dictionary)
+        const dictionary coeffDict_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        refinementSelection(const refinementSelection&) = delete;
+
+        //- Disallow default bitwise assignment
+        void operator=(const refinementSelection&) = delete;
+
+
+protected:
+
+    // Protected member functions
+
+        // Access functions for derived classes
+
+            //- Const access to the fvMesh
+            const fvMesh& mesh() const
+            {
+                return mesh_;
+            }
+
+            //- Const access to the coefficient dictionary
+            const dictionary& coeffDict() const
+            {
+                return coeffDict_;
+            }
+
+
+public:
+
+    //- Runtime type information
+    TypeName("refinementSelection");
+
+
+    // Declare run-time constructor selection table
+
+        declareRunTimeSelectionTable
+        (
+            autoPtr,
+            refinementSelection,
+            dictionary,
+            (
+                const fvMesh& mesh,
+                const dictionary& dict
+            ),
+            (mesh, dict)
+        );
+
+
+    // Constructors
+
+        //- Construct from components
+        refinementSelection(const fvMesh& mesh, const dictionary& dict);
+
+
+    // Selectors
+
+        //- Return an autoPtr to the selected refinementSelection
+        static autoPtr<refinementSelection> New
+        (
+            const fvMesh& mesh,
+            const dictionary& dict
+        );
+
+
+    //- Destructor
+    virtual ~refinementSelection() = default;
+
+
+    // Member Functions
+
+        // Selection of refinement/unrefinement candidates
+
+            //- Return transferable list of refinement cell candidates
+            virtual labelList refinementCellCandidates() const = 0;
+
+            //- Return transferable list of unrefinement split point candidates
+            virtual labelList unrefinementPointCandidates() const = 0;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/topoChangerFvMesh/movingConeTopoFvMesh/movingConeTopoFvMesh.C

@@ -326,7 +326,7 @@ Foam::movingConeTopoFvMesh::~movingConeTopoFvMesh()
 bool Foam::movingConeTopoFvMesh::update()
 {
     // Do mesh changes (use inflation - put new points in topoChangeMap)
-    autoPtr<mapPolyMesh> topoChangeMap = topoChanger_.changeMesh(true);
+    autoPtr<mapPolyMesh> topoChangeMap = topoChanger_.changeMesh();
 
     // Calculate the new point positions depending on whether the
     // topological change has happened or not

src/topoChangerFvMesh/rawTopoChangerFvMesh/rawTopoChangerFvMesh.C

@@ -77,8 +77,8 @@ bool Foam::rawTopoChangerFvMesh::update()
     moving(false);
     topoChanging(false);
 
-    // Do any topology changes. Sets topoChanging (through polyTopoChange)
-    autoPtr<mapPolyMesh> topoChangeMap = topoChanger_.changeMesh(true);
+    // Do any topology changes. Sets topoChanging (through batchPolyTopoChange)
+    autoPtr<mapPolyMesh> topoChangeMap = topoChanger_.changeMesh();
 
     const bool hasChanged = bool(topoChangeMap);