foam-extend4.1-coherent-io/applications/solvers/combustion/PDRFoam/PDRModels/turbulence/PDRkEpsilon/PDRkEpsilon.H

/*---------------------------------------------------------------------------*\
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Class
    Foam::compressible::RASModels::PDRkEpsilon

Description
    Standard k-epsilon turbulence model with additional source terms
    corresponding to PDR basic drag model (\link basic.H \endlink)

    The turbulence source term \f$ G_{R} \f$ appears in the
    \f$ \kappa-\epsilon \f$ equation for the generation of turbulence due to
    interaction with unresolved obstacles.

    In the \f$ \epsilon  \f$ equation \f$ C_{1} G_{R} \f$ is added as a source
    term.

    In the \f$ \kappa \f$ equation \f$ G_{R} \f$ is added as a source term.

SourceFiles
    PDRkEpsilon.C
    PDRkEpsilonCorrect.C

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

#ifndef compressiblePDRkEpsilon_H
#define compressiblePDRkEpsilon_H

#include "RASModel.H"

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

namespace Foam
{
namespace compressible
{
namespace RASModels
{

/*---------------------------------------------------------------------------*\
                           Class PDRkEpsilon Declaration
\*---------------------------------------------------------------------------*/

class PDRkEpsilon
:
    public RASModel
{
    // Private data

        dimensionedScalar Cmu_;
        dimensionedScalar C1_;
        dimensionedScalar C2_;
        dimensionedScalar alphak_;
        dimensionedScalar alphaEps_;
        dimensionedScalar alphah_;

        volScalarField k_;
        volScalarField epsilon_;
        volScalarField mut_;


public:

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

    // Constructors

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


    // Destructor
    virtual ~PDRkEpsilon()
    {}


    // Member Functions

        tmp<volScalarField> mut() const
        {
            return mut_;
        }

        //- Return the effective diffusivity for k
        tmp<volScalarField> DkEff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("DkEff", alphak_*mut_ + mu())
            );
        }

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

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

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

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

        //- Return the Reynolds stress tensor
        tmp<volSymmTensorField> R() const;

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

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

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

        //- Read turbulenceProperties dictionary
        bool read();
};


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

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

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

#endif

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