kEqn.H

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    Copyright (C) 2019-2021 OpenCFD Ltd.
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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.
 
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    You should have received a copy of the GNU General Public License
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Class
    Foam::LESModels::kEqn
 
Group
    grpLESTurbulence
 
Description
    One equation eddy-viscosity model
 
    Eddy viscosity SGS model using a modeled balance equation to simulate the
    behaviour of k.
 
    Reference:
    \verbatim
        Yoshizawa, A. (1986).
        Statistical theory for compressible turbulent shear flows,
        with the application to subgrid modeling.
        Physics of Fluids (1958-1988), 29(7), 2152-2164.
    \endverbatim
 
    The default model coefficients are
    \verbatim
        kEqnCoeffs
        {
            Ck                  0.094;
            Ce                  1.048;
        }
    \endverbatim
 
SourceFiles
    kEqn.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef kEqn_H
#define kEqn_H
 
#include "LESeddyViscosity.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace LESModels
{
 
/*---------------------------------------------------------------------------*\
                           Class kEqn Declaration
\*---------------------------------------------------------------------------*/
 
template<class BasicTurbulenceModel>
class kEqn
:
    public LESeddyViscosity<BasicTurbulenceModel>
{
protected:
 
    // Protected data
 
        // Fields
 
            volScalarField k_;
 
 
        // Model constants
 
            dimensionedScalar Ck_;
 
 
    // Protected Member Functions
 
        //- No copy construct
        kEqn(const kEqn&) = delete;
 
        //- No copy assignment
        void operator=(const kEqn&) = delete;
 
 
        virtual void correctNut();
        virtual tmp<fvScalarMatrix> kSource() const;
 
 
public:
 
    typedef typename BasicTurbulenceModel::alphaField alphaField;
    typedef typename BasicTurbulenceModel::rhoField rhoField;
    typedef typename BasicTurbulenceModel::transportModel transportModel;
 
 
    //- Runtime type information
    TypeName("kEqn");
 
 
    // Constructors
 
        //- Constructor from components
        kEqn
        (
            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 ~kEqn() = default;
 
 
    // Member Functions
 
        //- Read model coefficients if they have changed
        virtual bool read();
 
        //- Return SGS kinetic energy
        virtual tmp<volScalarField> k() const
        {
            return k_;
        }
 
        //- Return the effective diffusivity for k
        tmp<volScalarField> DkEff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("DkEff", this->nut_ + this->nu())
            );
        }
 
        //- Correct eddy-Viscosity and related properties
        virtual void correct();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace LESModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "kEqn.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //