movingMappedWallVelocityFvPatchVectorField.C

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#include "movingMappedWallVelocityFvPatchVectorField.H"
#include "volFields.H"
#include "surfaceFields.H"
#include "fvcMeshPhi.H"
#include "mappedFvPatchBaseBase.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::movingMappedWallVelocityFvPatchVectorField::
movingMappedWallVelocityFvPatchVectorField
(
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF,
    const dictionary& dict
)
:
    fixedValueFvPatchVectorField(p, iF, dict)
{}
 
 
Foam::movingMappedWallVelocityFvPatchVectorField::
movingMappedWallVelocityFvPatchVectorField
(
    const movingMappedWallVelocityFvPatchVectorField& ptf,
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF,
    const fieldMapper& mapper
)
:
    fixedValueFvPatchVectorField(ptf, p, iF, mapper, false)
{
    mapper(*this, ptf, vector::zero);
}
 
 
Foam::movingMappedWallVelocityFvPatchVectorField::
movingMappedWallVelocityFvPatchVectorField
(
    const movingMappedWallVelocityFvPatchVectorField& mwvpvf,
    const DimensionedField<vector, volMesh>& iF
)
:
    fixedValueFvPatchVectorField(mwvpvf, iF)
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::movingMappedWallVelocityFvPatchVectorField::map
(
    const fvPatchVectorField& ptf,
    const fieldMapper& mapper
)
{
    mapper(*this, ptf, vector::zero);
}
 
 
void Foam::movingMappedWallVelocityFvPatchVectorField::updateCoeffs()
{
    if (updated())
    {
        return;
    }
 
    const fvPatch& fvp = patch();
 
    const mappedFvPatchBaseBase& mapper =
        mappedFvPatchBaseBase::getMap(patch());
    const fvMesh& nbrMesh = mapper.nbrMesh();
    const fvPatch& nbrFvp = mapper.nbrFvPatch();
 
    if (nbrMesh.moving())
    {
        // Calculate the normal velocity on this mesh from the mesh flux
        const volVectorField& U =
            static_cast<const volVectorField&>(internalField());
        tmp<scalarField> Un =
            U.mesh().moving()
          ? fvc::meshPhi(U, fvp.index())/(fvp.magSf() + vSmall)
          : tmp<scalarField>(new scalarField(fvp.size(), Zero));
 
        // Calculate and map the mesh velocity from the neighbour
        vectorField nbrCf(nbrFvp.size()), nbrCf0(nbrFvp.size());
        forAll(nbrCf0, nbrPatchFacei)
        {
            const label nbrPolyFacei =
                nbrMesh.polyFacesBf()[nbrFvp.index()][nbrPatchFacei];
            nbrCf[nbrPatchFacei] =
                nbrMesh.faceCentres()[nbrPolyFacei];
            nbrCf0[nbrPatchFacei] =
                nbrMesh.faces()[nbrPolyFacei].centre(nbrMesh.oldPoints());
        }
        const vectorField nbrUp
        (
            (nbrCf - nbrCf0)/db().time().deltaTValue()
        );
        const vectorField Up(mapper.fromNeighbour(nbrUp));
 
        // Set the velocity equal to the normal component from this mesh plus
        // the tangential component from the neighbouring mesh. That way the
        // flux is exactly preserved but the neighbour can impart shear. The
        // normal components should be the same anyway, otherwise the mapped
        // patches are moving apart. Using the normal component from this mesh
        // just prevents mapping inaccuracies from affecting the flux.
        const vectorField n(fvp.nf());
        vectorField::operator=(Up + n*(Un - (n & Up)));
    }
 
    fixedValueFvPatchVectorField::updateCoeffs();
}
 
 
void Foam::movingMappedWallVelocityFvPatchVectorField::write(Ostream& os) const
{
    fvPatchVectorField::write(os);
    writeEntry(os, "value", *this);
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
    makePatchTypeField
    (
        fvPatchVectorField,
        movingMappedWallVelocityFvPatchVectorField
    );
}
 
// ************************************************************************* //