patchMeanVelocityForce.C

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License
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#include "patchMeanVelocityForce.H"
#include "volFields.H"
#include "processorCyclicPolyPatch.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
 
namespace Foam
{
namespace fv
{
    defineTypeNameAndDebug(patchMeanVelocityForce, 0);
 
    addToRunTimeSelectionTable
    (
        fvConstraint,
        patchMeanVelocityForce,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
void Foam::fv::patchMeanVelocityForce::readCoeffs()
{
    patch_ = coeffs().lookup<word>("patch");
 
    if (mesh().boundaryMesh().findIndex(patch_) < 0)
    {
        FatalErrorInFunction
            << "Cannot find patch " << patch_
            << exit(FatalError);
    }
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::fv::patchMeanVelocityForce::patchMeanVelocityForce
(
    const word& sourceName,
    const word& modelType,
    const fvMesh& mesh,
    const dictionary& dict
)
:
    meanVelocityForce(sourceName, modelType, mesh, dict),
    patch_(word::null)
{
    readCoeffs();
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::scalar Foam::fv::patchMeanVelocityForce::magUbarAve
(
    const volVectorField& U
) const
{
    const label patchi = mesh().boundaryMesh().findIndex(patch_);
 
    scalar sumA = sum(mesh().boundary()[patchi].magSf());
    scalar sumAmagU =
        sum
        (
            mesh().boundary()[patchi].magSf()
           *(normalised(Ubar()) & U.boundaryField()[patchi])
        );
 
    // 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]))
    {
        const labelList processorCyclicPatches
        (
            processorCyclicPolyPatch::patchIDs(patch_, patches)
        );
 
        forAll(processorCyclicPatches, pcpi)
        {
            const label patchi = processorCyclicPatches[pcpi];
 
            sumA += sum(mesh().boundary()[patchi].magSf());
            sumAmagU +=
                sum
                (
                    mesh().boundary()[patchi].magSf()
                   *(normalised(Ubar()) & U.boundaryField()[patchi])
                );
        }
    }
 
    mesh().reduce(sumA, sumOp<scalar>());
    mesh().reduce(sumAmagU, sumOp<scalar>());
 
    return sumAmagU/sumA;
}
 
 
bool Foam::fv::patchMeanVelocityForce::read(const dictionary& dict)
{
    if (meanVelocityForce::read(dict))
    {
        readCoeffs();
        return true;
    }
    else
    {
        return false;
    }
}
 
 
// ************************************************************************* //