patchMeanVelocityForce.C

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    Copyright (C) 2015-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
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    for more details.
 
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#include "patchMeanVelocityForce.H"
#include "processorCyclicPolyPatch.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
 
namespace Foam
{
namespace fv
{
    defineTypeNameAndDebug(patchMeanVelocityForce, 0);
 
    addToRunTimeSelectionTable
    (
        option,
        patchMeanVelocityForce,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::fv::patchMeanVelocityForce::patchMeanVelocityForce
(
    const word& sourceName,
    const word& modelType,
    const dictionary& dict,
    const fvMesh& mesh
)
:
    meanVelocityForce(sourceName, modelType, dict, mesh),
    patch_(coeffs_.get<word>("patch")),
    patchi_(mesh.boundaryMesh().findPatchID(patch_))
{
    if (patchi_ < 0)
    {
        FatalErrorInFunction
            << "Cannot find patch " << patch_
            << exit(FatalError);
    }
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::scalar Foam::fv::patchMeanVelocityForce::magUbarAve
(
    const volVectorField& U
) const
{
    vector2D sumAmagUsumA
    (
        sum
        (
            (flowDir_ & U.boundaryField()[patchi_])
           *mesh_.boundary()[patchi_].magSf()
        ),
        sum(mesh_.boundary()[patchi_].magSf())
    );
 
 
    // If the mean velocity force is applied to a cyclic patch
    // for parallel runs include contributions from processorCyclic patches
    // generated from the decomposition of the cyclic patch
    const polyBoundaryMesh& patches = mesh_.boundaryMesh();
 
    if (Pstream::parRun() && isA<cyclicPolyPatch>(patches[patchi_]))
    {
        labelList processorCyclicPatches
        (
            processorCyclicPolyPatch::patchIDs(patch_, patches)
        );
 
        forAll(processorCyclicPatches, pcpi)
        {
            const label patchi = processorCyclicPatches[pcpi];
 
            sumAmagUsumA.x() +=
                sum
                (
                    (flowDir_ & U.boundaryField()[patchi])
                   *mesh_.boundary()[patchi].magSf()
                );
 
            sumAmagUsumA.y() += sum(mesh_.boundary()[patchi].magSf());
        }
    }
 
    mesh_.reduce(sumAmagUsumA, sumOp<vector2D>());
 
    return sumAmagUsumA.x()/sumAmagUsumA.y();
}
 
 
// ************************************************************************* //