LaunderGibsonRSTM.H

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Class
    Foam::compressible::RASModels::LaunderGibsonRSTM

Description
    Launder-Gibson Reynolds stress turbulence model for compressible flows.

    The default model coefficients correspond to the following:
    @verbatim
        LaunderGibsonRSTMCoeffs
        {
            Cmu         0.09;
            kappa       0.41;
            Clg1        1.8;
            Clg2        0.6;
            C1          1.44;
            C2          1.92;
            C1Ref       0.5;
            C2Ref       0.3;
            Cs          0.25;
            Ceps        0.15;
            sigmah      1.0;    // only for compressible
            sigmaEps    1.3;
            sigmaR      0.81967;
            couplingFactor  0.0;
        }
    @endverbatim

SourceFiles
    LaunderGibsonRSTM.C
    LaunderGibsonRSTMcorrect.C

\*---------------------------------------------------------------------------*/

#ifndef compressibleLaunderGibsonRSTM_H
#define compressibleLaunderGibsonRSTM_H

#include <compressibleRASModels/RASModel.H>
#include <finiteVolume/wallDistReflection.H>

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

namespace Foam
{
namespace compressible
{
namespace RASModels
{

/*---------------------------------------------------------------------------*\
                           Class LaunderGibsonRSTM Declaration
\*---------------------------------------------------------------------------*/

class LaunderGibsonRSTM
:
    public RASModel
{
    // Private data

        // Model coefficients

            dimensionedScalar Cmu_;
            dimensionedScalar kappa_;

            dimensionedScalar Clg1_;
            dimensionedScalar Clg2_;

            dimensionedScalar C1_;
            dimensionedScalar C2_;
            dimensionedScalar Cs_;
            dimensionedScalar Ceps_;

            dimensionedScalar C1Ref_;
            dimensionedScalar C2Ref_;

            dimensionedScalar couplingFactor_;

            dimensionedScalar sigmaR_;
            dimensionedScalar sigmaEps_;
            dimensionedScalar Prt_;


        // Fields

            wallDistReflection y_;

            volSymmTensorField R_;
            volScalarField k_;
            volScalarField epsilon_;
            volScalarField mut_;
            volScalarField alphat_;


public:

    //- Runtime type information
    TypeName("LaunderGibsonRSTM");

    // Constructors

        //- Construct from components
        LaunderGibsonRSTM
        (
            const volScalarField& rho,
            const volVectorField& U,
            const surfaceScalarField& phi,
            const basicThermo& thermophysicalModel
        );


    //- Destructor
    virtual ~LaunderGibsonRSTM()
    {}


    // Member Functions

        //- Return the effective diffusivity for R
        tmp<volScalarField> DREff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("DREff", mut_/sigmaR_ + mu())
            );
        }

        //- Return the effective diffusivity for epsilon
        tmp<volScalarField> DepsilonEff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("DepsilonEff", mut_/sigmaEps_ + mu())
            );
        }

        //- Return the turbulence viscosity
        virtual tmp<volScalarField> mut() const
        {
            return mut_;
        }

        //- Return the effective turbulent thermal diffusivity
        virtual tmp<volScalarField> alphaEff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("alphaEff", alphat_ + alpha())
            );
        }

        //- Return the turbulence kinetic energy
        virtual tmp<volScalarField> k() const
        {
            return k_;
        }

        //- Return the turbulence kinetic energy dissipation rate
        virtual tmp<volScalarField> epsilon() const
        {
            return epsilon_;
        }

        //- Return the Reynolds stress tensor
        virtual tmp<volSymmTensorField> R() const
        {
            return R_;
        }

        //- Return the effective stress tensor including the laminar stress
        virtual tmp<volSymmTensorField> devRhoReff() const;

        //- Return the source term for the momentum equation
        virtual tmp<fvVectorMatrix> divDevRhoReff(volVectorField& U) const;

        //- Solve the turbulence equations and correct the turbulence viscosity
        virtual void correct();

        //- Read RASProperties dictionary
        virtual bool read();
};


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

} // End namespace RASModels
} // End namespace compressible
} // End namespace Foam

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

#endif

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