qZeta.H

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Class
    Foam::incompressible::RASModels::qZeta

Description
    Gibson and Dafa'Alla's q-zeta two-equation low-Re turbulence model
    for incompressible flows

SourceFiles
    qZeta.C

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

#ifndef qZeta_H
#define qZeta_H

#include <incompressibleRASModels/RASModel.H>

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

namespace Foam
{
namespace incompressible
{
namespace RASModels
{

/*---------------------------------------------------------------------------*\
                           Class qZeta Declaration
\*---------------------------------------------------------------------------*/

class qZeta
:
    public RASModel
{
    // Private data

        // Model coefficients

            dimensionedScalar Cmu_;
            dimensionedScalar C1_;
            dimensionedScalar C2_;
            dimensionedScalar sigmaZeta_;
            Switch anisotropic_;


        // Fields

            volScalarField k_;
            volScalarField epsilon_;

            volScalarField q_;
            volScalarField zeta_;

            volScalarField nut_;


    // Private member functions

        tmp<volScalarField> fMu() const;
        tmp<volScalarField> f2() const;


public:

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

    // Constructors

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


    //- Destructor
    virtual ~qZeta()
    {}


    // Member Functions

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

        //- Return the effective diffusivity for q
        tmp<volScalarField> DqEff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("DqEff", nut_ + nu())
            );
        }

        //- Return the effective diffusivity for epsilon
        tmp<volScalarField> DzetaEff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("DzetaEff", nut_/sigmaZeta_ + nu())
            );
        }

        //- 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;

        virtual const volScalarField& q() const
        {
            return q_;
        }

        virtual const volScalarField& zeta() const
        {
            return zeta_;
        }

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

        //- Return the source term for the momentum equation
        virtual tmp<fvVectorMatrix> divDevReff(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 incompressible
} // End namespace Foam

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

#endif

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