ENH: overset: various improvements in the framework

The improvements include:

- Allowing overset patches to be displaced outside background domain.
  - The approach does not support overlapping of multiple inset meshes
    on top of background domain.
- Allowing fringe faces to walk away from hole cells in background domain.
  - The approach was not extensibly tested with overlapping patches.
- Improving mass conservation.
- Various experimental entries are removed: massFluxInterpolation, ddtCorr.
- New entries:
  - oversetAdjustPhi: adds a flux correction outside the pressure equation.
  - massCorrection: adds an implicit correction.

applications/solvers/basic/laplacianFoam/overLaplacianDyMFoam/Make/options

@@ -3,6 +3,7 @@ EXE_INC = \
     -I$(LIB_SRC)/meshTools/lnInclude \
     -I$(LIB_SRC)/dynamicFvMesh/lnInclude \
     -I$(LIB_SRC)/overset/lnInclude \
+    -I$(LIB_SRC)/overset/include/lnInclude
 
 EXE_LIBS = \
     -lfiniteVolume \

applications/solvers/basic/laplacianFoam/overLaplacianDyMFoam/createFields.H

@@ -31,3 +31,25 @@
     Info<< "Reading diffusivity DT\n" << endl;
 
     dimensionedScalar DT("DT", dimViscosity, transportProperties);
+
+    bool oversetPatchErrOutput =
+        simple.dict().getOrDefault("oversetPatchErrOutput", false);
+
+    // Dummy phi for oversetPatchErrOutput
+    tmp<surfaceScalarField> tdummyPhi;
+    if (oversetPatchErrOutput)
+    {
+        tdummyPhi = tmp<surfaceScalarField>::New
+        (
+            IOobject
+            (
+                "dummyPhi",
+                runTime.timeName(),
+                mesh,
+                IOobject::NO_READ,
+                IOobject::NO_WRITE
+            ),
+            mesh,
+            dimensionedScalar(dimless, Zero)
+        );
+    }

applications/solvers/basic/laplacianFoam/overLaplacianDyMFoam/overLaplacianDyMFoam.C

@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2015 OpenFOAM Foundation
-    Copyright (C) 2016-2017 OpenCFD Ltd.
+    Copyright (C) 2016-2022 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -58,6 +58,7 @@ Description
 #include "fvOptions.H"
 #include "simpleControl.H"
 #include "dynamicFvMesh.H"
+#include "oversetPatchPhiErr.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -99,6 +100,11 @@ int main(int argc, char *argv[])
             fvOptions.constrain(TEqn);
             TEqn.solve();
             fvOptions.correct(T);
+
+            if (oversetPatchErrOutput)
+            {
+                oversetPatchPhiErr(TEqn, tdummyPhi.ref());
+            }
         }
 
         #include "write.H"

applications/solvers/basic/potentialFoam/overPotentialFoam/overPotentialFoam.C

@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2017 OpenCFD Ltd
+    Copyright (C) 2017-2022 OpenCFD Ltd
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -149,7 +149,6 @@ int main(int argc, char *argv[])
 
     mesh.update();
 
-    surfaceScalarField faceMask(localMin<scalar>(mesh).interpolate(cellMask));
 
     // Since solver contains no time loop it would never execute
     // function objects so do it ourselves