SpalartAllmarasDES.H

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Class
    Foam::LESModels::SpalartAllmarasDES
 
Description
    SpalartAllmarasDES DES turbulence model for incompressible and
    compressible flows
 
    Reference:
    \verbatim
        Spalart, P. R., Jou, W. H., Strelets, M., & Allmaras, S. R. (1997).
        Comments on the feasibility of LES for wings, and on a hybrid
        RANS/LES approach.
        Advances in DNS/LES, 1, 4-8.
    \endverbatim
 
SourceFiles
    SpalartAllmarasDES.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef SpalartAllmarasDES_H
#define SpalartAllmarasDES_H
 
#include "LESeddyViscosity.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace LESModels
{
 
/*---------------------------------------------------------------------------*\
                     Class SpalartAllmarasDES Declaration
\*---------------------------------------------------------------------------*/
 
template<class BasicMomentumTransportModel>
class SpalartAllmarasDES
:
    public LESeddyViscosity<BasicMomentumTransportModel>
{
protected:
 
    // Protected data
 
        // Model constants
 
            dimensionedScalar sigmaNut_;
            dimensionedScalar kappa_;
 
            dimensionedScalar Cb1_;
            dimensionedScalar Cb2_;
            dimensionedScalar Cw1_;
            dimensionedScalar Cw2_;
            dimensionedScalar Cw3_;
            dimensionedScalar Cv1_;
            dimensionedScalar Cs_;
            dimensionedScalar CDES_;
            dimensionedScalar ck_;
 
        // Fields
 
            volScalarField nuTilda_;
 
            //- Wall distance
            //  Note: different to wall distance in parent RASModel
            //  which is for near-wall cells only
            const volScalarField& y_;
 
 
    // Protected Member Functions
 
        tmp<volScalarField> chi() const;
 
        tmp<volScalarField> fv1(const volScalarField& chi) const;
 
        tmp<volScalarField::Internal> fv2
        (
            const volScalarField::Internal& chi,
            const volScalarField::Internal& fv1
        ) const;
 
        tmp<volScalarField::Internal> Omega
        (
            const volTensorField::Internal& gradU
        ) const;
 
        tmp<volScalarField::Internal> Stilda
        (
            const volScalarField::Internal& chi,
            const volScalarField::Internal& fv1,
            const volScalarField::Internal& Omega,
            const volScalarField::Internal& dTilda
        ) const;
 
        tmp<volScalarField::Internal> r
        (
            const volScalarField::Internal& nur,
            const volScalarField::Internal& Omega,
            const volScalarField::Internal& dTilda
        ) const;
 
        tmp<volScalarField::Internal> fw
        (
            const volScalarField::Internal& Omega,
            const volScalarField::Internal& dTilda
        ) const;
 
        //- Length scale
        virtual tmp<volScalarField::Internal> dTilda
        (
            const volScalarField::Internal& chi,
            const volScalarField::Internal& fv1,
            const volTensorField::Internal& gradU
        ) const;
 
        //- Cache the LES region indicator field
        virtual void cacheLESRegion
        (
            const volScalarField::Internal& dTilda
        ) const;
 
        void correctNut(const volScalarField& fv1);
        virtual void correctNut();
 
 
public:
 
    typedef typename BasicMomentumTransportModel::alphaField alphaField;
    typedef typename BasicMomentumTransportModel::rhoField rhoField;
 
 
    //- Runtime type information
    TypeName("SpalartAllmarasDES");
 
 
    // Constructors
 
        //- Construct from components
        SpalartAllmarasDES
        (
            const alphaField& alpha,
            const rhoField& rho,
            const volVectorField& U,
            const surfaceScalarField& alphaRhoPhi,
            const surfaceScalarField& phi,
            const viscosity& viscosity,
            const word& type = typeName
        );
 
        //- Disallow default bitwise copy construction
        SpalartAllmarasDES(const SpalartAllmarasDES&) = delete;
 
 
    //- Destructor
    virtual ~SpalartAllmarasDES()
    {}
 
 
    // Member Functions
 
        //- Read model coefficients if they have changed
        virtual bool read();
 
        //- Return the effective diffusivity for nuTilda
        tmp<volScalarField> DnuTildaEff() const;
 
        //- Return SGS kinetic energy
        virtual tmp<volScalarField> k() const;
 
        tmp<volScalarField> nuTilda() const
        {
            return nuTilda_;
        }
 
        //- Correct nuTilda and related properties
        virtual void correct();
 
 
    // Member Operators
 
        //- Disallow default bitwise assignment
        void operator=(const SpalartAllmarasDES&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace LESModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "SpalartAllmarasDES.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //