fvcCorrectAlpha.C

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/*---------------------------------------------------------------------------*\
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    \\  /    A nd           | www.openfoam.com
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    Copyright (C) 2017-2023 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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InNamespace
    Foam::fvc

Description
    Correct flux-U difference in the internal loop  using relaxation factor

SourceFiles
    fvcCorrectAlpha.C

\*---------------------------------------------------------------------------*/

#include "fvcCorrectAlpha.H"
#include "fvMesh.H"
#include "surfaceInterpolate.H"

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

namespace Foam
{

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

namespace fvc
{

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

tmp<GeometricField<scalar, fvsPatchField, surfaceMesh>> alphaCorr
(
    const GeometricField<vector, fvPatchField, volMesh>& U,
    const GeometricField<scalar, fvsPatchField, surfaceMesh>& phiU,
    const bool finalIter
)
{
    const fvMesh& mesh = U.mesh();
    const word fieldName = U.select(finalIter);

    scalar alpha = 1;
    mesh.relaxEquation(fieldName, alpha);

    return
        (1 - alpha)
       *(phiU.prevIter() - (fvc::interpolate(U.prevIter()) & mesh.Sf()));
}

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

} // End namespace fvc

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

} // End namespace Foam

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