GenSGSStress.H

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Class
    Foam::incompressible::LESModels::GenSGSStress

Description
    General base class for all incompressible models that directly
    solve for the SGS stress tensor B.

    Contains tensor fields B (the SGS stress tensor) as well as scalar
    fields for k (SGS turbulent energy) gamma (SGS viscosity) and epsilon
    (SGS dissipation).

SourceFiles
    GenSGSStress.C

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

#ifndef GenSGSStress_H
#define GenSGSStress_H

#include <incompressibleLESModels/LESModel.H>

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

namespace Foam
{
namespace incompressible
{
namespace LESModels
{

/*---------------------------------------------------------------------------*\
                           Class GenSGSStress Declaration
\*---------------------------------------------------------------------------*/

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

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


protected:

        dimensionedScalar ce_;

        dimensionedScalar couplingFactor_;

        volSymmTensorField B_;
        volScalarField nuSgs_;


public:

    // Constructors

        //- Construct from components
        GenSGSStress
        (
            const volVectorField& U,
            const surfaceScalarField& phi,
            transportModel& transport
        );


    //- Destructor
    virtual ~GenSGSStress()
    {}


    // Member Functions

        //- Return the SGS turbulent kinetic energy.
        virtual tmp<volScalarField> k() const
        {
            return 0.5*tr(B_);
        }

        //- Return the SGS turbulent dissipation.
        virtual tmp<volScalarField> epsilon() const
        {
            volScalarField K = k();
            return ce_*K*sqrt(K)/delta();
        }

        //- Return the SGS viscosity.
        virtual tmp<volScalarField> nuSgs() const
        {
            return nuSgs_;
        }

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

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

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

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


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

} // End namespace LESModels
} // End namespace incompressible
} // End namespace Foam

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

#endif

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