ENH: Added new fvc cellReduce functions with templated op to generate cell data from face data

src/finiteVolume/finiteVolume/fvc/fvcCellReduce.C

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "fvcCellReduce.H"
+#include "fvMesh.H"
+#include "volFields.H"
+#include "surfaceFields.H"
+#include "zeroGradientFvPatchFields.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace fvc
+{
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+template<class Type, class CombineOp>
+tmp<GeometricField<Type, fvPatchField, volMesh> > cellReduce
+(
+    const GeometricField<Type, fvsPatchField, surfaceMesh>& ssf,
+    const CombineOp& cop
+)
+{
+    typedef GeometricField<Type, fvPatchField, volMesh> volFieldType;
+
+    const fvMesh& mesh = ssf.mesh();
+
+    tmp<volFieldType> tresult
+    (
+        new volFieldType
+        (
+            IOobject
+            (
+                "cellReduce(" + ssf.name() + ')',
+                ssf.instance(),
+                mesh,
+                IOobject::NO_READ,
+                IOobject::NO_WRITE
+            ),
+            mesh,
+            dimensioned<Type>("0", ssf.dimensions(), pTraits<Type>::zero),
+            zeroGradientFvPatchField<Type>::typeName
+        )
+    );
+
+    volFieldType& result = tresult();
+
+    const labelUList& own = mesh.owner();
+    const labelUList& nbr = mesh.neighbour();
+
+    forAll(own, i)
+    {
+        label cellI = own[i];
+        cop(result[cellI], ssf[i]);
+    }
+    forAll(nbr, i)
+    {
+        label cellI = nbr[i];
+        cop(result[cellI], ssf[i]);
+    }
+
+    result.correctBoundaryConditions();
+
+    return tresult;
+}
+
+
+template<class Type, class CombineOp>
+tmp<GeometricField<Type, fvPatchField, volMesh> > cellReduce
+(
+    const tmp<GeometricField<Type, fvsPatchField, surfaceMesh>&> tssf,
+    const CombineOp& cop
+)
+{
+    tmp<GeometricField<Type, fvPatchField, volMesh> >
+        tvf(cellReduce(cop, tssf));
+
+   tssf.clear();
+    return tvf;
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace fvc
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// ************************************************************************* //

src/finiteVolume/finiteVolume/fvc/fvcCellReduce.H

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2013 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+InNamespace
+    Foam::fvc
+
+Description
+    Construct a volume field from a surface field using a combine operator.
+
+SourceFiles
+    fvcCellReduce.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef fvcCellReduce_H
+#define fvcCellReduce_H
+
+#include "volFieldsFwd.H"
+#include "surfaceFieldsFwd.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                      Namespace fvc functions Declaration
+\*---------------------------------------------------------------------------*/
+
+namespace fvc
+{
+    template<class Type, class CombineOp>
+    tmp<GeometricField<Type, fvPatchField, volMesh> > cellReduce
+    (
+        const GeometricField<Type, fvsPatchField, surfaceMesh>&,
+        const CombineOp& cop
+    );
+
+    template<class Type, class CombineOp>
+    tmp<GeometricField<Type, fvPatchField, volMesh> > cellReduce
+    (
+        const tmp<GeometricField<Type, fvsPatchField, surfaceMesh> >&,
+        const CombineOp& cop
+    );
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+#   include "fvcCellReduce.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //