GenEddyVisc.H

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Class
    Foam::compressible::LESModels::GenEddyVisc

Description
    General base class for all compressible models that can be implemented as
    an eddy viscosity, i.e. algebraic and one-equation models.

    Contains fields for k (SGS turbulent kinetic energy), gamma
    (modelled viscosity) and epsilon (SGS dissipation).

SourceFiles
    GenEddyVisc.C

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

#ifndef compressibleGenEddyVisc_H
#define compressibleGenEddyVisc_H

#include <compressibleLESModels/LESModel.H>

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

namespace Foam
{
namespace compressible
{
namespace LESModels
{

/*---------------------------------------------------------------------------*\
                           Class GenEddyVisc Declaration
\*---------------------------------------------------------------------------*/

class GenEddyVisc
:
    virtual public LESModel
{
    // Private Member Functions

        // Disallow default bitwise copy construct and assignment
        GenEddyVisc(const GenEddyVisc&);
        GenEddyVisc& operator=(const GenEddyVisc&);


protected:

    // Model coefficients

        dimensionedScalar ce_;
        dimensionedScalar Prt_;


    // Fields

        volScalarField k_;
        volScalarField muSgs_;
        volScalarField alphaSgs_;


public:

    // Constructors

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


    //- Destructor
    virtual ~GenEddyVisc()
    {}


    // Member Functions

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

        //- Return sub-grid disipation rate
        virtual tmp<volScalarField> epsilon() const
        {
            return ce_*k_*sqrt(k_)/delta();
        }

        //- Return viscosity
        virtual tmp<volScalarField> muSgs() const
        {
            return muSgs_;
        }

        //- Return thermal diffusivity
        virtual tmp<volScalarField> alphaSgs() const
        {
            return alphaSgs_;
        }

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

        //- Return the sub-grid stress tensor.
        virtual tmp<volSymmTensorField> B() const;

        //- Return the deviatoric part of the effective sub-grid
        //  turbulence stress tensor including the laminar stress
        virtual tmp<volSymmTensorField> devRhoBeff() const;

        //- Returns div(rho*dev(B)).
        // This is the additional term due to the filtering of the NSE.
        virtual tmp<fvVectorMatrix> divDevRhoBeff(volVectorField& U) const;

        //- Correct Eddy-Viscosity and related properties
        virtual void correct(const tmp<volTensorField>& gradU);

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


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

} // End namespace LESModels
} // End namespace compressible
} // End namespace Foam

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

#endif

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