kOmegaSSTSAS.C

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#include "kOmegaSSTSAS.H"
#include "fvcLaplacian.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace RASModels
{
 
// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
 
template<class BasicMomentumTransportModel>
tmp<fvScalarMatrix> kOmegaSSTSAS<BasicMomentumTransportModel>::Qsas
(
    const volScalarField::Internal& S2,
    const volScalarField::Internal& gamma,
    const volScalarField::Internal& beta
) const
{
    volScalarField::Internal L
    (
        sqrt(this->k_())/(pow025(this->betaStar_)*this->omega_())
    );
 
    volScalarField::Internal Lvk
    (
        max
        (
            kappa_*sqrt(S2)
           /(
                mag(fvc::laplacian(this->U_))()()
              + dimensionedScalar
                (
                    "rootVSmall",
                    dimensionSet(0, -1, -1, 0, 0),
                    rootVSmall
                )
            ),
            Cs_*sqrt(kappa_*zeta2_/(beta/this->betaStar_ - gamma))*delta()()
        )
    );
 
    return fvm::Su
    (
        this->alpha_()*this->rho_()
       *min
        (
            max
            (
                zeta2_*kappa_*S2*sqr(L/Lvk)
              - (2*C_/sigmaPhi_)*this->k_()
               *max
                (
                    magSqr(fvc::grad(this->omega_)()())/sqr(this->omega_()),
                    magSqr(fvc::grad(this->k_)()())/sqr(this->k_())
                ),
                dimensionedScalar(dimensionSet(0, 0, -2, 0, 0), 0)
            ),
            // Limit SAS production of omega for numerical stability,
            // particularly during start-up
            this->omega_()/(0.1*this->omega_.time().deltaT())
        ),
        this->omega_
    );
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class BasicMomentumTransportModel>
kOmegaSSTSAS<BasicMomentumTransportModel>::kOmegaSSTSAS
(
    const alphaField& alpha,
    const rhoField& rho,
    const volVectorField& U,
    const surfaceScalarField& alphaRhoPhi,
    const surfaceScalarField& phi,
    const viscosity& viscosity,
    const word& type
)
:
    kOmegaSST<BasicMomentumTransportModel>
    (
        alpha,
        rho,
        U,
        alphaRhoPhi,
        phi,
        viscosity
    ),
 
    Cs_("Cs", this->coeffDict(), 0.11),
    kappa_("kappa", this->coeffDict(), 0.41),
    zeta2_("zeta2", this->coeffDict(), 3.51),
    sigmaPhi_("sigmaPhi", this->coeffDict(), 2.0/3.0),
    C_("C", this->coeffDict(), 2),
 
    delta_
    (
        LESdelta::New
        (
            this->groupName("delta"),
            *this,
            this->coeffDict()
        )
    )
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class BasicMomentumTransportModel>
bool kOmegaSSTSAS<BasicMomentumTransportModel>::read()
{
    if (kOmegaSST<BasicMomentumTransportModel>::read())
    {
        Cs_.readIfPresent(this->coeffDict());
        kappa_.readIfPresent(this->coeffDict());
        sigmaPhi_.readIfPresent(this->coeffDict());
        zeta2_.readIfPresent(this->coeffDict());
        C_.readIfPresent(this->coeffDict());
 
        return true;
    }
    else
    {
        return false;
    }
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace RASModels
} // End namespace Foam
 
// ************************************************************************* //