fvOptions: Separate options for all cells, cellSets and inter-region coupling

by introducing rational base-classes rather than using the hideous
'switch' statement.  Further rationalization of the cell-selection
mechanism will be implemented via an appropriate class hierarchy to
replace the remaining 'switch' statement.

Mesh-motion is currently handled very inefficiently for cellSets and not
at all for inter-region coupling.  The former will be improved when the
cell-selection classes are written and the latter by making the
meshToMesh class a MeshObject after it has been corrected for mapFields.

tutorials/compressible/rhoLTSPimpleFoam/angledDuct/constant/fvOptions

@@ -18,12 +18,13 @@ FoamFile
 porosity1
 {
     type            explicitPorositySource;
-    active          true;
-    selectionMode   cellZone;
-    cellZone        porosity;
+    active          yes;
 
     explicitPorositySourceCoeffs
     {
+        selectionMode   cellZone;
+        cellZone        porosity;
+
         type            DarcyForchheimer;
 
         DarcyForchheimerCoeffs

tutorials/compressible/rhoPimpleFoam/ras/angledDuct/constant/fvOptions

@@ -18,12 +18,13 @@ FoamFile
 porosity1
 {
     type            explicitPorositySource;
-    active          true;
-    selectionMode   cellZone;
-    cellZone        porosity;
+    active          yes;
 
     explicitPorositySourceCoeffs
     {
+        selectionMode   cellZone;
+        cellZone        porosity;
+
         type            DarcyForchheimer;
 
         DarcyForchheimerCoeffs

tutorials/compressible/rhoPimpleFoam/ras/angledDuct/constant/polyMesh/boundary

@@ -20,24 +20,28 @@ FoamFile
     front
     {
         type            wall;
+        inGroups        1(wall);
         nFaces          700;
         startFace       63400;
     }
     back
     {
         type            wall;
+        inGroups        1(wall);
         nFaces          700;
         startFace       64100;
     }
-    wall
+    walls
     {
         type            wall;
+        inGroups        1(wall);
         nFaces          1400;
         startFace       64800;
     }
     porosityWall
     {
         type            wall;
+        inGroups        1(wall);
         nFaces          1600;
         startFace       66200;
     }

tutorials/compressible/rhoPimpleFoam/ras/mixerVessel2D/constant/fvOptions

@@ -19,11 +19,12 @@ porosity1
 {
     type            explicitPorositySource;
     active          yes;
-    selectionMode   cellZone;
-    cellZone        stator;
 
     explicitPorositySourceCoeffs
     {
+        selectionMode   cellZone;
+        cellZone        stator;
+
         type            DarcyForchheimer;
 
         DarcyForchheimerCoeffs

tutorials/compressible/rhoPimpleFoam/ras/mixerVessel2D/constant/polyMesh/boundary

@@ -20,24 +20,28 @@ FoamFile
     rotor
     {
         type            wall;
+        inGroups        1(wall);
         nFaces          192;
         startFace       5952;
     }
     stator
     {
         type            wall;
+        inGroups        1(wall);
         nFaces          192;
         startFace       6144;
     }
     front
     {
         type            empty;
+        inGroups        1(empty);
         nFaces          3072;
         startFace       6336;
     }
     back
     {
         type            empty;
+        inGroups        1(empty);
         nFaces          3072;
         startFace       9408;
     }

tutorials/compressible/rhoPimplecFoam/angledDuct/constant/fvOptions

@@ -18,12 +18,13 @@ FoamFile
 porosity1
 {
     type            explicitPorositySource;
-    active          true;
-    selectionMode   cellZone;
-    cellZone        porosity;
+    active          yes;
 
     explicitPorositySourceCoeffs
     {
+        selectionMode   cellZone;
+        cellZone        porosity;
+
         type            DarcyForchheimer;
 
         DarcyForchheimerCoeffs

tutorials/compressible/rhoPorousSimpleFoam/angledDuctImplicit/constant/fvOptions

@@ -18,12 +18,13 @@ FoamFile
 source1
 {
     type            fixedTemperatureConstraint;
-    active          true;
-    selectionMode   cellZone;
-    cellZone        porosity;
+    active          yes;
 
     fixedTemperatureConstraintCoeffs
     {
+        selectionMode   cellZone;
+        cellZone        porosity;
+
         mode            uniform;
         temperature     350;
     }

tutorials/compressible/rhoPorousSimpleFoam/angledDuctImplicit/constant/polyMesh/boundary

@@ -8,7 +8,7 @@
 FoamFile
 {
     version     2.0;
-    format      ascii;
+    format      binary;
     class       polyBoundaryMesh;
     location    "constant/polyMesh";
     object      boundary;

tutorials/compressible/rhoSimpleFoam/angledDuctExplicitFixedCoeff/constant/fvOptions

@@ -18,12 +18,12 @@ FoamFile
 fixedTemperaure1
 {
     type            fixedTemperatureConstraint;
-    active          true;
-    selectionMode   cellZone;
-    cellZone        porosity;
+    active          yes;
 
     fixedTemperatureConstraintCoeffs
     {
+        selectionMode   cellZone;
+        cellZone        porosity;
         mode            uniform;
         temperature     350;
     }
@@ -33,12 +33,12 @@ fixedTemperaure1
 porosity1
 {
     type            explicitPorositySource;
-    active          true;
-    selectionMode   cellZone;
-    cellZone        porosity;
+    active          yes;
 
     explicitPorositySourceCoeffs
     {
+        selectionMode   cellZone;
+        cellZone        porosity;
         type            fixedCoeff;
         active          yes;
         cellZone        porosity;