RNGkEpsilon.H

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/*---------------------------------------------------------------------------*\
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License
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Class
    Foam::compressible::RASModels::RNGkEpsilon

Description
    Renormalisation group k-epsilon turbulence model for compressible flows.

    The default model coefficients correspond to the following:
    @verbatim
        RNGkEpsilonCoeffs
        {
            Cmu         0.0845;
            C1          1.42;
            C2          1.68;
            C3          -0.33;  // only for compressible
            Prt         1.0;    // only for compressible
            sigmak      0.71942;
            sigmaEps    0.71942;
            eta0        4.38;
            beta        0.012;
        }
    @endverbatim

SourceFiles
    RNGkEpsilon.C
    RNGkEpsilonCorrect.C

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

#ifndef compressibleRNGkEpsilon_H
#define compressibleRNGkEpsilon_H

#include <compressibleRASModels/RASModel.H>

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

namespace Foam
{
namespace compressible
{
namespace RASModels
{

/*---------------------------------------------------------------------------*\
                           Class RNGkEpsilon Declaration
\*---------------------------------------------------------------------------*/

class RNGkEpsilon
:
    public RASModel
{
    // Private data

        // Model coefficients

            dimensionedScalar Cmu_;
            dimensionedScalar C1_;
            dimensionedScalar C2_;
            dimensionedScalar C3_;
            dimensionedScalar sigmak_;
            dimensionedScalar sigmaEps_;
            dimensionedScalar Prt_;
            dimensionedScalar eta0_;
            dimensionedScalar beta_;

        // Fields

            volScalarField k_;
            volScalarField epsilon_;
            volScalarField mut_;
            volScalarField alphat_;


public:

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

    // Constructors

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


    //- Destructor
    virtual ~RNGkEpsilon()
    {}


    // Member Functions

        //- Return the effective diffusivity for k
        tmp<volScalarField> DkEff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("DkEff", mut_/sigmak_ + 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 the effective stress tensor including the laminar stress
        virtual tmp<volSymmTensorField> devRhoReff() const;

        //- Return the effective stress tensor including the laminar stress
        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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