continuousGasKEpsilon.H

Go to the documentation of this file.

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2013-2022 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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
 
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    This model is unpublished and is provided as a stable numerical framework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;
            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 BasicMomentumTransportModel>
class continuousGasKEpsilon
:
    public kEpsilon<BasicMomentumTransportModel>
{
    // Private Data
 
        mutable const momentumTransportModel *liquidTurbulencePtr_;
 
        volScalarField nutEff_;
 
 
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 BasicMomentumTransportModel::alphaField alphaField;
    typedef typename BasicMomentumTransportModel::rhoField rhoField;
 
 
    //- 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 viscosity& viscosity,
            const word& type = typeName
        );
 
        //- Disallow default bitwise copy construction
        continuousGasKEpsilon(const continuousGasKEpsilon&) = delete;
 
 
    //- Destructor
    virtual ~continuousGasKEpsilon()
    {}
 
 
    // Member Functions
 
        //- Re-read model coefficients if they have changed
        virtual bool read();
 
        //- Return the turbulence model for the liquid phase
        const momentumTransportModel& 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 stress tensor [m^2/s^2]
        virtual tmp<volSymmTensorField> sigma() const;
 
 
    // Member Operators
 
        //- Disallow default bitwise assignment
        void operator=(const continuousGasKEpsilon&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace RASModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "continuousGasKEpsilon.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //