cellMDLimitedGrads.C

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#include "cellMDLimitedGrad.H"
#include "gaussGrad.H"
#include "fvMesh.H"
#include "volFields.H"
#include "fixedValueFvPatchFields.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
makeFvGradScheme(cellMDLimitedGrad)
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
template<>
Foam::tmp<Foam::volVectorField>
Foam::fv::cellMDLimitedGrad<Foam::scalar>::calcGrad
(
    const volScalarField& vsf,
    const word& name
) const
{
    const fvMesh& mesh = vsf.mesh();
 
    tmp<volVectorField> tGrad = basicGradScheme_().calcGrad(vsf, name);
 
    if (k_ < small)
    {
        return tGrad;
    }
 
    volVectorField& g = tGrad.ref();
 
    const labelUList& owner = mesh.owner();
    const labelUList& neighbour = mesh.neighbour();
 
    const volVectorField& C = mesh.C();
    const surfaceVectorField& Cf = mesh.Cf();
 
    scalarField maxVsf(vsf.primitiveField());
    scalarField minVsf(vsf.primitiveField());
 
    forAll(owner, facei)
    {
        label own = owner[facei];
        label nei = neighbour[facei];
 
        scalar vsfOwn = vsf[own];
        scalar vsfNei = vsf[nei];
 
        maxVsf[own] = max(maxVsf[own], vsfNei);
        minVsf[own] = min(minVsf[own], vsfNei);
 
        maxVsf[nei] = max(maxVsf[nei], vsfOwn);
        minVsf[nei] = min(minVsf[nei], vsfOwn);
    }
 
 
    const volScalarField::Boundary& bsf = vsf.boundaryField();
 
    forAll(bsf, patchi)
    {
        const fvPatchScalarField& psf = bsf[patchi];
 
        const labelUList& pOwner = mesh.boundary()[patchi].faceCells();
 
        if (psf.coupled())
        {
            const scalarField psfNei(psf.patchNeighbourField());
 
            forAll(pOwner, pFacei)
            {
                label own = pOwner[pFacei];
                scalar vsfNei = psfNei[pFacei];
 
                maxVsf[own] = max(maxVsf[own], vsfNei);
                minVsf[own] = min(minVsf[own], vsfNei);
            }
        }
        else
        {
            forAll(pOwner, pFacei)
            {
                label own = pOwner[pFacei];
                scalar vsfNei = psf[pFacei];
 
                maxVsf[own] = max(maxVsf[own], vsfNei);
                minVsf[own] = min(minVsf[own], vsfNei);
            }
        }
    }
 
    maxVsf -= vsf;
    minVsf -= vsf;
 
    if (k_ < 1.0)
    {
        const scalarField maxMinVsf((1.0/k_ - 1.0)*(maxVsf - minVsf));
        maxVsf += maxMinVsf;
        minVsf -= maxMinVsf;
 
        // maxVsf *= 1.0/k_;
        // minVsf *= 1.0/k_;
    }
 
 
    forAll(owner, facei)
    {
        label own = owner[facei];
        label nei = neighbour[facei];
 
        // owner side
        limitFace
        (
            g[own],
            maxVsf[own],
            minVsf[own],
            Cf[facei] - C[own]
        );
 
        // neighbour side
        limitFace
        (
            g[nei],
            maxVsf[nei],
            minVsf[nei],
            Cf[facei] - C[nei]
        );
    }
 
 
    forAll(bsf, patchi)
    {
        const labelUList& pOwner = mesh.boundary()[patchi].faceCells();
        const vectorField& pCf = Cf.boundaryField()[patchi];
 
        forAll(pOwner, pFacei)
        {
            label own = pOwner[pFacei];
 
            limitFace
            (
                g[own],
                maxVsf[own],
                minVsf[own],
                pCf[pFacei] - C[own]
            );
        }
    }
 
    g.correctBoundaryConditions();
    gaussGrad<scalar>::correctBoundaryConditions(vsf, g);
 
    return tGrad;
}
 
 
template<>
Foam::tmp<Foam::volTensorField>
Foam::fv::cellMDLimitedGrad<Foam::vector>::calcGrad
(
    const volVectorField& vsf,
    const word& name
) const
{
    const fvMesh& mesh = vsf.mesh();
 
    tmp<volTensorField> tGrad = basicGradScheme_().calcGrad(vsf, name);
 
    if (k_ < small)
    {
        return tGrad;
    }
 
    volTensorField& g = tGrad.ref();
 
    const labelUList& owner = mesh.owner();
    const labelUList& neighbour = mesh.neighbour();
 
    const volVectorField& C = mesh.C();
    const surfaceVectorField& Cf = mesh.Cf();
 
    vectorField maxVsf(vsf.primitiveField());
    vectorField minVsf(vsf.primitiveField());
 
    forAll(owner, facei)
    {
        label own = owner[facei];
        label nei = neighbour[facei];
 
        const vector& vsfOwn = vsf[own];
        const vector& vsfNei = vsf[nei];
 
        maxVsf[own] = max(maxVsf[own], vsfNei);
        minVsf[own] = min(minVsf[own], vsfNei);
 
        maxVsf[nei] = max(maxVsf[nei], vsfOwn);
        minVsf[nei] = min(minVsf[nei], vsfOwn);
    }
 
 
    const volVectorField::Boundary& bsf = vsf.boundaryField();
 
    forAll(bsf, patchi)
    {
        const fvPatchVectorField& psf = bsf[patchi];
        const labelUList& pOwner = mesh.boundary()[patchi].faceCells();
 
        if (psf.coupled())
        {
            const vectorField psfNei(psf.patchNeighbourField());
 
            forAll(pOwner, pFacei)
            {
                label own = pOwner[pFacei];
                const vector& vsfNei = psfNei[pFacei];
 
                maxVsf[own] = max(maxVsf[own], vsfNei);
                minVsf[own] = min(minVsf[own], vsfNei);
            }
        }
        else
        {
            forAll(pOwner, pFacei)
            {
                label own = pOwner[pFacei];
                const vector& vsfNei = psf[pFacei];
 
                maxVsf[own] = max(maxVsf[own], vsfNei);
                minVsf[own] = min(minVsf[own], vsfNei);
            }
        }
    }
 
    maxVsf -= vsf;
    minVsf -= vsf;
 
    if (k_ < 1.0)
    {
        const vectorField maxMinVsf((1.0/k_ - 1.0)*(maxVsf - minVsf));
        maxVsf += maxMinVsf;
        minVsf -= maxMinVsf;
 
        // maxVsf *= 1.0/k_;
        // minVsf *= 1.0/k_;
    }
 
 
    forAll(owner, facei)
    {
        label own = owner[facei];
        label nei = neighbour[facei];
 
        // owner side
        limitFace
        (
            g[own],
            maxVsf[own],
            minVsf[own],
            Cf[facei] - C[own]
        );
 
        // neighbour side
        limitFace
        (
            g[nei],
            maxVsf[nei],
            minVsf[nei],
            Cf[facei] - C[nei]
        );
    }
 
 
    forAll(bsf, patchi)
    {
        const labelUList& pOwner = mesh.boundary()[patchi].faceCells();
        const vectorField& pCf = Cf.boundaryField()[patchi];
 
        forAll(pOwner, pFacei)
        {
            label own = pOwner[pFacei];
 
            limitFace
            (
                g[own],
                maxVsf[own],
                minVsf[own],
                pCf[pFacei] - C[own]
            );
        }
    }
 
    g.correctBoundaryConditions();
    gaussGrad<vector>::correctBoundaryConditions(vsf, g);
 
    return tGrad;
}
 
 
// ************************************************************************* //