relaxedSnGrad.C

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#include "fv.H"
#include "relaxedSnGrad.H"
#include "volFields.H"
#include "surfaceFields.H"

// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

template<class Type>
Foam::tmp<Foam::GeometricField<Type, Foam::fvsPatchField, Foam::surfaceMesh>>
Foam::fv::relaxedSnGrad<Type>::correction
(
    const GeometricField<Type, fvPatchField, volMesh>& vf
) const
{
    typedef GeometricField<Type, fvsPatchField, surfaceMesh> SurfFieldType;

    // Calculate explicit correction field
    tmp<SurfFieldType> tcorrection = correctedScheme_().correction(vf);

    // Retrieve relaxation factor value
    const word fieldName(vf.name());
    const word oldFieldName(fieldName + "_0");
    const scalar relax =
        vf.mesh().fieldRelaxationFactor("snGrad("+fieldName+")");

    // Return explicit correction field if
    // previous-time step correction is unavailable
    const objectRegistry& obr = vf.db();
    if (!obr.foundObject<SurfFieldType>(oldFieldName))
    {
        SurfFieldType* oldCorrection =
            new SurfFieldType(oldFieldName, tcorrection());
        oldCorrection->store();
    }

    // Return under/over-relaxed explicit correction field
    tmp<SurfFieldType> trelaxedCorrection(new SurfFieldType(tcorrection()));

    SurfFieldType& oldCorrection =
        obr.lookupObjectRef<SurfFieldType>(oldFieldName);

    trelaxedCorrection.ref() *= relax;
    trelaxedCorrection.ref() += (scalar(1) - relax)*oldCorrection;

    oldCorrection = tcorrection;

    return trelaxedCorrection;
}


// ************************************************************************* //