SpalartAllmarasIDDES.C

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#include "SpalartAllmarasIDDES.H"

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

namespace Foam
{
namespace LESModels
{

// * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //

template<class BasicMomentumTransportModel>
tmp<volScalarField::Internal>
SpalartAllmarasIDDES<BasicMomentumTransportModel>::IDDESalpha() const
{
    return volScalarField::Internal::New
    (
        modelName("alpha"),
        max(0.25 - this->y_()/IDDESDelta_.hmax(), scalar(-5))
    );
}


template<class BasicMomentumTransportModel>
tmp<volScalarField::Internal>
SpalartAllmarasIDDES<BasicMomentumTransportModel>::ft
(
    const volScalarField::Internal& magGradU
) const
{
    return volScalarField::Internal::New
    (
        modelName("ft"),
        tanh(pow3(sqr(ct_)*rd(this->nut_, magGradU)))
    );
}


template<class BasicMomentumTransportModel>
tmp<volScalarField::Internal>
SpalartAllmarasIDDES<BasicMomentumTransportModel>::fl
(
    const volScalarField::Internal& magGradU
) const
{
    return volScalarField::Internal::New
    (
        modelName("fl"),
        tanh(pow(sqr(cl_)*rd(this->nu(), magGradU), 10))
    );
}


template<class BasicMomentumTransportModel>
tmp<volScalarField::Internal>
SpalartAllmarasIDDES<BasicMomentumTransportModel>::rd
(
    const volScalarField::Internal& nur,
    const volScalarField::Internal& magGradU
) const
{
    return volScalarField::Internal::New
    (
        modelName("rd"),
        min
        (
            nur
           /(
               max
               (
                   magGradU,
                   dimensionedScalar(magGradU.dimensions(), small)
               )*sqr(this->kappa_*this->y_())
            ),
            scalar(10)
        )
    );
}


template<class BasicMomentumTransportModel>
tmp<volScalarField::Internal>
SpalartAllmarasIDDES<BasicMomentumTransportModel>::fd
(
    const volScalarField::Internal& magGradU
) const
{
    return volScalarField::Internal::New
    (
        modelName("fd"),
        1 - tanh(pow3(8*rd(this->nuEff(), magGradU)))
    );
}


// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //

template<class BasicMomentumTransportModel>
tmp<volScalarField::Internal>
SpalartAllmarasIDDES<BasicMomentumTransportModel>::dTilda
(
    const volScalarField::Internal& chi,
    const volScalarField::Internal& fv1,
    const volTensorField::Internal& gradU
) const
{
    const volScalarField::Internal alpha(IDDESalpha());

    const volScalarField::Internal expTerm
    (
        modelName("expTerm"),
        exp(sqr(alpha))
    );

    const volScalarField::Internal magGradU(modelName("magGradU"), mag(gradU));

    tmp<volScalarField::Internal> fHill
    (
        volScalarField::Internal::New
        (
            modelName("fHill"),
            2*(pos0(alpha)*pow(expTerm, -11.09) + neg(alpha)*pow(expTerm, -9.0))
        )
    );

    tmp<volScalarField::Internal> fStep
    (
        volScalarField::Internal::New
        (
            modelName("fStep"),
            min(2*pow(expTerm, -9.0), scalar(1))
        )
    );

    const volScalarField::Internal fHyb
    (
        modelName("fHyb"),
        max(1 - fd(magGradU), fStep)
    );

    tmp<volScalarField::Internal> fAmp
    (
        volScalarField::Internal::New
        (
            modelName("fAmp"),
            1 - max(ft(magGradU), fl(magGradU))
        )
    );

    tmp<volScalarField::Internal> fRestore
    (
        volScalarField::Internal::New
        (
            modelName("fRestore"),
            max(fHill - 1, scalar(0))*fAmp
        )
    );

    // IGNORING ft2 terms
    const volScalarField::Internal Psi
    (
        modelName("Psi"),
        sqrt
        (
            min
            (
                scalar(100),
                (
                    1
                  - this->Cb1_*this->fv2(chi, fv1)
                   /(this->Cw1_*sqr(this->kappa_)*fwStar_)
                 )/max(small, fv1)
            )
        )
    );

    return volScalarField::Internal::New
    (
        modelName("dTilda"),
        max
        (
            dimensionedScalar(dimLength, small),
            fHyb*(1 + fRestore*Psi)*this->y_
          + (1 - fHyb)*this->CDES_*Psi*this->delta()
        )
    );
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

template<class BasicMomentumTransportModel>
SpalartAllmarasIDDES<BasicMomentumTransportModel>::SpalartAllmarasIDDES
(
    const alphaField& alpha,
    const rhoField& rho,
    const volVectorField& U,
    const surfaceScalarField& alphaRhoPhi,
    const surfaceScalarField& phi,
    const viscosity& viscosity,
    const word& type
)
:
    SpalartAllmarasDES<BasicMomentumTransportModel>
    (
        alpha,
        rho,
        U,
        alphaRhoPhi,
        phi,
        viscosity
    ),
    fwStar_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "fwStar",
            this->coeffDict_,
            0.424
        )
    ),
    cl_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "cl",
            this->coeffDict_,
            3.55
        )
    ),
    ct_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "ct",
            this->coeffDict_,
            1.63
        )
    ),
    IDDESDelta_(refCast<IDDESDelta>(this->delta_()))
{}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

template<class BasicMomentumTransportModel>
bool SpalartAllmarasIDDES<BasicMomentumTransportModel>::read()
{
    if (SpalartAllmarasDES<BasicMomentumTransportModel>::read())
    {
        fwStar_.readIfPresent(this->coeffDict());
        cl_.readIfPresent(this->coeffDict());
        ct_.readIfPresent(this->coeffDict());

        return true;
    }
    else
    {
        return false;
    }
}


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

} // End namespace LESModels
} // End namespace Foam

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