continuousGasKEpsilon.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2013-2016 OpenFOAM Foundation
    Copyright (C) 2019 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::RASModels::continuousGasKEpsilon
 
Group
    grpRASTurbulence
 
Description
    k-epsilon model for the gas-phase in a two-phase system
    supporting phase-inversion.
 
    In the limit that the gas-phase fraction approaches zero a contribution from
    the other phase is blended into the k and epsilon equations up to the
    phase-fraction of alphaInversion at which point phase-inversion is
    considered to have occurred and the model reverts to the pure single-phase
    form.
 
    This model is unpublished and is provided as a stable numerical framework
    on which a more physical model may be built.
 
    The default model coefficients are
    \verbatim
        continuousGasKEpsilonCoeffs
        {
            Cmu             0.09;
            C1              1.44;
            C2              1.92;
            C3              -0.33;
            sigmak          1.0;
            sigmaEps        1.3;
            alphaInversion  0.7;
        }
    \endverbatim
 
SourceFiles
    continuousGasKEpsilon.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef continuousGasKEpsilon_H
#define continuousGasKEpsilon_H
 
#include "kEpsilon.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace RASModels
{
 
/*---------------------------------------------------------------------------*\
                           Class continuousGasKEpsilon Declaration
\*---------------------------------------------------------------------------*/
 
template<class BasicTurbulenceModel>
class continuousGasKEpsilon
:
    public kEpsilon<BasicTurbulenceModel>
{
    // Private data
 
        mutable const turbulenceModel *liquidTurbulencePtr_;
 
        volScalarField nutEff_;
 
 
    // Private Member Functions
 
        //- No copy construct
        continuousGasKEpsilon(const continuousGasKEpsilon&) = delete;
 
        //- No copy assignment
        void operator=(const continuousGasKEpsilon&) = delete;
 
 
protected:
 
    // Protected data
 
        // Model coefficients
 
            dimensionedScalar alphaInversion_;
 
 
    // Protected Member Functions
 
        virtual void correctNut();
        tmp<volScalarField> phaseTransferCoeff() const;
        virtual tmp<fvScalarMatrix> kSource() const;
        virtual tmp<fvScalarMatrix> epsilonSource() const;
 
 
public:
 
    typedef typename BasicTurbulenceModel::alphaField alphaField;
    typedef typename BasicTurbulenceModel::rhoField rhoField;
    typedef typename BasicTurbulenceModel::transportModel transportModel;
 
 
    //- Runtime type information
    TypeName("continuousGasKEpsilon");
 
 
    // Constructors
 
        //- Construct from components
        continuousGasKEpsilon
        (
            const alphaField& alpha,
            const rhoField& rho,
            const volVectorField& U,
            const surfaceScalarField& alphaRhoPhi,
            const surfaceScalarField& phi,
            const transportModel& transport,
            const word& propertiesName = turbulenceModel::propertiesName,
            const word& type = typeName
        );
 
 
    //- Destructor
    virtual ~continuousGasKEpsilon() = default;
 
 
    // Member Functions
 
        //- Re-read model coefficients if they have changed
        virtual bool read();
 
        //- Return the turbulence model for the liquid phase
        const turbulenceModel& liquidTurbulence() const;
 
        //- Return the effective viscosity
        virtual tmp<volScalarField> nuEff() const;
 
        //- Return the effective density for the stress
        virtual tmp<volScalarField> rhoEff() const;
 
        //- Return the Reynolds stress tensor
        virtual tmp<volSymmTensorField> R() const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace RASModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "continuousGasKEpsilon.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //