continuousGasKEqn.H

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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
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    You should have received a copy of the GNU General Public License
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Class
    Foam::LESModels::continuousGasKEqn
 
Description
    One-equation SGS 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-equation 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    This model is unpublished and is provided as a stable numerical framework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
        continuousKEqnCoeffs
        {
            Ck              0.094;
            Ce              1.048;
            alphaInversion  0.7;
        }
    \endverbatim
 
SourceFiles
    continuousGasKEqn.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef continuousGasKEqn_H
#define continuousGasKEqn_H
 
#include "kEqn.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace LESModels
{
 
/*---------------------------------------------------------------------------*\
                      Class continuousGasKEqn Declaration
\*---------------------------------------------------------------------------*/
 
template<class BasicMomentumTransportModel>
class continuousGasKEqn
:
    public kEqn<BasicMomentumTransportModel>
{
    // Private Data
 
        mutable const momentumTransportModel *liquidTurbulencePtr_;
 
 
protected:
 
    // Protected data
 
        // Model coefficients
 
            dimensionedScalar alphaInversion_;
 
 
    // Protected Member Functions
 
        //- Return the turbulence model for the liquid phase
        const momentumTransportModel& liquidTurbulence() const;
 
        tmp<volScalarField> phaseTransferCoeff() const;
        virtual tmp<fvScalarMatrix> kSource() const;
 
 
public:
 
    typedef typename BasicMomentumTransportModel::alphaField alphaField;
    typedef typename BasicMomentumTransportModel::rhoField rhoField;
 
 
    //- Runtime type information
    TypeName("continuousGasKEqn");
 
 
    // Constructors
 
        //- Construct from components
        continuousGasKEqn
        (
            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
        continuousGasKEqn(const continuousGasKEqn&) = delete;
 
 
    //- Destructor
    virtual ~continuousGasKEqn()
    {}
 
 
    // Member Functions
 
        //- Read model coefficients if they have changed
        virtual bool read();
 
 
    // Member Operators
 
        //- Disallow default bitwise assignment
        void operator=(const continuousGasKEqn&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace LESModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "continuousGasKEqn.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //