kOmega.H

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Class
    Foam::incompressible::RASModels::kOmega

Description
    Standard high Reynolds-number k-omega turbulence model for
    incompressible flows.

    References:
    @verbatim
        "Turbulence Modeling for CFD"
        D. C. Wilcox,
        DCW Industries, Inc., La Canada,
        California, 1988.

        See also:
        http://www.cfd-online.com/Wiki/Wilcox's_k-omega_model
    @endverbatim

    The default model coefficients correspond to the following:
    @verbatim
        kOmegaCoeffs
        {
            Cmu         0.09;  // Equivalent to betaStar
            alpha       0.52;
            beta        0.072;
            alphak      0.5;
            alphaOmega  0.5;
        }
    @endverbatim

SourceFiles
    kOmega.C

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

#ifndef kOmega_H
#define kOmega_H

#include <incompressibleRASModels/RASModel.H>

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

namespace Foam
{
namespace incompressible
{
namespace RASModels
{

/*---------------------------------------------------------------------------*\
                           Class kOmega Declaration
\*---------------------------------------------------------------------------*/

class kOmega
:
    public RASModel
{
    // Private data

        // Model coefficients

            dimensionedScalar Cmu_;
            dimensionedScalar beta_;
            dimensionedScalar alpha_;
            dimensionedScalar alphaK_;
            dimensionedScalar alphaOmega_;


        // Fields

            volScalarField k_;
            volScalarField omega_;
            volScalarField nut_;


public:

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

    // Constructors

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


    // Destructor
    virtual ~kOmega()
    {}


    // Member Functions

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

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

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

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

        //- Return the turbulence specific dissipation rate
        virtual tmp<volScalarField> omega() const
        {
            return omega_;
        }

        //- Return the turbulence kinetic energy dissipation rate
        virtual tmp<volScalarField> epsilon() const
        {
            return tmp<volScalarField>
            (
                new volScalarField
                (
                    IOobject
                    (
                        "epsilon",
                        mesh_.time().timeName(),
                        mesh_
                    ),
                    Cmu_*k_*omega_,
                    omega_.boundaryField().types()
                )
            );
        }

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

        //- 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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