fusedGaussConvectionScheme.C

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2024 M. Janssens
-------------------------------------------------------------------------------
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
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\*---------------------------------------------------------------------------*/
 
#include "fvcSurfaceOps.H"
#include "fusedGaussConvectionScheme.H"
#include "fvcSurfaceIntegrate.H"
#include "fvMatrices.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace fv
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
template<class Type>
const surfaceInterpolationScheme<Type>&
fusedGaussConvectionScheme<Type>::interpScheme() const
{
    return tinterpScheme_();
}
 
 
template<class Type>
tmp<GeometricField<Type, fvsPatchField, surfaceMesh>>
fusedGaussConvectionScheme<Type>::interpolate
(
    const surfaceScalarField&,
    const GeometricField<Type, fvPatchField, volMesh>& vf
) const
{
    return tinterpScheme_().interpolate(vf);
}
 
 
template<class Type>
tmp<GeometricField<Type, fvsPatchField, surfaceMesh>>
fusedGaussConvectionScheme<Type>::flux
(
    const surfaceScalarField& faceFlux,
    const GeometricField<Type, fvPatchField, volMesh>& vf
) const
{
    return faceFlux*interpolate(faceFlux, vf);
}
 
 
template<class Type>
tmp<fvMatrix<Type>>
fusedGaussConvectionScheme<Type>::fvmDiv
(
    const surfaceScalarField& faceFlux,
    const GeometricField<Type, fvPatchField, volMesh>& vf
) const
{
    DebugPout<< "fusedGaussConvectionScheme<Type>::fvmDiv on " << vf.name()
        << " with flux " << faceFlux.name() << endl;
 
    tmp<surfaceScalarField> tweights = tinterpScheme_().weights(vf);
    const surfaceScalarField& weights = tweights();
 
    tmp<fvMatrix<Type>> tfvm
    (
        new fvMatrix<Type>
        (
            vf,
            faceFlux.dimensions()*vf.dimensions()
        )
    );
    fvMatrix<Type>& fvm = tfvm.ref();
 
    //fvm.lower() = -weights.primitiveField()*faceFlux.primitiveField();
    multiplySubtract
    (
        fvm.lower(),
        weights.primitiveField(),
        faceFlux.primitiveField()
    );
 
    //fvm.upper() = fvm.lower() + faceFlux.primitiveField();
    add(fvm.upper(), fvm.lower(), faceFlux.primitiveField());
 
    fvm.negSumDiag();
 
    forAll(vf.boundaryField(), patchi)
    {
        const fvPatchField<Type>& psf = vf.boundaryField()[patchi];
        const fvsPatchScalarField& patchFlux = faceFlux.boundaryField()[patchi];
        const fvsPatchScalarField& pw = weights.boundaryField()[patchi];
 
        auto& intCoeffs = fvm.internalCoeffs()[patchi];
        auto& bouCoeffs = fvm.boundaryCoeffs()[patchi];
 
        //fvm.internalCoeffs()[patchi] = patchFlux*psf.valueInternalCoeffs(pw);
        multiply(intCoeffs, patchFlux, psf.valueInternalCoeffs(pw)());
 
        //fvm.boundaryCoeffs()[patchi] = -patchFlux*psf.valueBoundaryCoeffs(pw);
        multiply(bouCoeffs, patchFlux, psf.valueBoundaryCoeffs(pw)());
        bouCoeffs.negate();
    }
 
    if (tinterpScheme_().corrected())
    {
        fvm += fvc::surfaceIntegrate(faceFlux*tinterpScheme_().correction(vf));
    }
 
    return tfvm;
}
 
 
template<class Type>
tmp<GeometricField<Type, fvPatchField, volMesh>>
fusedGaussConvectionScheme<Type>::fvcDiv
(
    const surfaceScalarField& faceFlux,
    const GeometricField<Type, fvPatchField, volMesh>& vf
) const
{
    DebugPout<< "fusedGaussConvectionScheme<Type>::fvcDiv on " << vf.name()
        << " with flux " << faceFlux.name() << endl;
 
    typedef GeometricField<Type, fvPatchField, volMesh> FieldType;
 
    const fvMesh& mesh = vf.mesh();
 
    tmp<FieldType> tConvection
    (
        new FieldType
        (
            IOobject
            (
                "convection(" + faceFlux.name() + ',' + vf.name() + ')',
                vf.instance(),
                mesh,
                IOobject::NO_READ,
                IOobject::NO_WRITE
            ),
            mesh,
            dimensioned<Type>
            (
                faceFlux.dimensions()
               *vf.dimensions()
               /dimVol,
                Zero
            ),
            fvPatchFieldBase::extrapolatedCalculatedType()
        )
    );
 
    if (this->tinterpScheme_().corrected())
    {
        const auto tfaceCorr(this->tinterpScheme_().correction(vf));
        auto& faceCorr = tfaceCorr();
 
        const auto interpolator = [&]
        (
            const vector& area,
            const scalar lambda,
 
            const Type& ownVal,
            const Type& neiVal,
 
            const scalar& faceVal,
            const Type& correction
 
        ) -> Type
        {
            return faceVal*((lambda*(ownVal - neiVal) + neiVal) + correction);
        };
 
        fvc::surfaceSum
        (
            // interpolation factors for volume field
            this->tinterpScheme_().weights(vf),
 
            // volume field(s)
            vf,
 
            // surface field(s)
            faceFlux,
            faceCorr,
 
            // operation
            interpolator,
 
            tConvection.ref(),
            false
        );
    }
    else
    {
        const auto interpolator = [&]
        (
            const vector& area,
            const scalar lambda,
            const Type& ownVal,
            const Type& neiVal,
 
            const scalar& faceVal
        ) -> Type
        {
            return faceVal*(lambda*(ownVal - neiVal) + neiVal);
        };
 
        fvc::surfaceSum
        (
            tinterpScheme_().weights(vf),
 
            vf,
 
            faceFlux,
 
            interpolator,
            tConvection.ref(),
            false
        );
    }
 
    tConvection.ref().primitiveFieldRef() /= mesh.Vsc();
 
    tConvection.ref().correctBoundaryConditions();
 
    return tConvection;
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace fv
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// ************************************************************************* //