anisotropicFilter.C

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#include "anisotropicFilter.H"
#include "fvcSurfaceIntegrate.H"
#include "fvcSnGrad.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
    defineTypeNameAndDebug(anisotropicFilter, 0);
    addToRunTimeSelectionTable(LESfilter, anisotropicFilter, dictionary);
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
template<class Type>
inline Foam::tmp<Foam::VolField<Type>> Foam::anisotropicFilter::filter
(
    const tmp<VolField<Type>>& unFilteredField
) const
{
    correctBoundaryConditions(unFilteredField);
 
    tmp<VolField<Type>> tmpFilteredField
    (
        VolField<Type>::New
        (
            "anisotropicFilteredField",
            mesh(),
            unFilteredField().dimensions()
        )
    );
 
    for (direction d=0; d<pTraits<Type>::nComponents; d++)
    {
        tmpFilteredField.ref().replace
        (
            d, anisotropicFilter::operator()(unFilteredField().component(d))
        );
    }
 
    unFilteredField.clear();
 
    return tmpFilteredField;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::anisotropicFilter::anisotropicFilter
(
    const fvMesh& mesh,
    scalar widthCoeff
)
:
    LESfilter(mesh),
    widthCoeff_(widthCoeff),
    coeff_
    (
        IOobject
        (
            "anisotropicFilterCoeff",
            mesh.time().name(),
            mesh
        ),
        mesh,
        dimensionedVector(dimLength*dimLength, Zero),
        calculatedFvPatchVectorField::typeName
    )
{
    for (direction d=0; d<vector::nComponents; d++)
    {
        coeff_.primitiveFieldRef().replace
        (
            d,
            (1/widthCoeff_)*
            sqr
            (
                2.0*mesh.V()
               /fvc::surfaceSum(mag(mesh.Sf().component(d)))().primitiveField()
            )
        );
    }
}
 
 
Foam::anisotropicFilter::anisotropicFilter
(
    const fvMesh& mesh,
    const dictionary& bd
)
:
    LESfilter(mesh),
    widthCoeff_
    (
        bd.optionalSubDict(type() + "Coeffs").lookup<scalar>("widthCoeff")
    ),
    coeff_
    (
        IOobject
        (
            "anisotropicFilterCoeff",
            mesh.time().name(),
            mesh
        ),
        mesh,
        dimensionedVector(dimLength*dimLength, Zero),
        calculatedFvPatchScalarField::typeName
    )
{
    for (direction d=0; d<vector::nComponents; d++)
    {
        coeff_.primitiveFieldRef().replace
        (
            d,
            (1/widthCoeff_)*
            sqr
            (
                2.0*mesh.V()
               /fvc::surfaceSum(mag(mesh.Sf().component(d)))().primitiveField()
            )
        );
    }
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::anisotropicFilter::read(const dictionary& bd)
{
    bd.optionalSubDict(type() + "Coeffs").lookup("widthCoeff") >> widthCoeff_;
}
 
 
// * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField> Foam::anisotropicFilter::operator()
(
    const tmp<volScalarField>& unFilteredField
) const
{
    correctBoundaryConditions(unFilteredField);
 
    tmp<volScalarField> tmpFilteredField =
        unFilteredField
      + (
           coeff_
         & fvc::surfaceIntegrateExtrapolate
           (
               mesh().Sf()
              *fvc::snGrad(unFilteredField())
           )
        );
 
    unFilteredField.clear();
 
    return tmpFilteredField;
}
 
 
Foam::tmp<Foam::volVectorField> Foam::anisotropicFilter::operator()
(
    const tmp<volVectorField>& unFilteredField
) const
{
    return filter(unFilteredField);
}
 
 
Foam::tmp<Foam::volSymmTensorField> Foam::anisotropicFilter::operator()
(
    const tmp<volSymmTensorField>& unFilteredField
) const
{
    return filter(unFilteredField);
}
 
 
Foam::tmp<Foam::volTensorField> Foam::anisotropicFilter::operator()
(
    const tmp<volTensorField>& unFilteredField
) const
{
    return filter(unFilteredField);
}
 
 
// ************************************************************************* //