ReynoldsStress.H

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    Copyright (C) 2019-2022 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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Class
    Foam::ReynoldsStress
 
Group
    grpTurbulence
 
Description
    Reynolds-stress turbulence model base class
 
    Reference:
    \verbatim
        Realizability conditions (tag:S):
            Schumann, U. (1977).
            Realizability of Reynolds‐stress turbulence models.
            The Physics of Fluids, 20(5), 721-725.
            DOI:10.1063/1.861942
    \endverbatim
 
SourceFiles
    ReynoldsStress.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef ReynoldsStress_H
#define ReynoldsStress_H
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class ReynoldsStress Declaration
\*---------------------------------------------------------------------------*/
 
template<class BasicTurbulenceModel>
class ReynoldsStress
:
    public BasicTurbulenceModel
{
 
protected:
 
    // Protected data
 
        // Model coefficients
 
            dimensionedScalar couplingFactor_;
 
        // Fields
 
            volSymmTensorField R_;
            volScalarField nut_;
 
 
    // Protected Member Functions
 
        void boundNormalStress(volSymmTensorField& R) const;
        void correctWallShearStress(volSymmTensorField& R) const;
        void checkRealizabilityConditions(const volSymmTensorField& R) const;
 
        //- Update the eddy-viscosity
        virtual void correctNut() = 0;
 
        //- Return the source term for the momentum equation
        template<class RhoFieldType>
        tmp<fvVectorMatrix> DivDevRhoReff
        (
            const RhoFieldType& rho,
            volVectorField& U
        ) const;
 
 
public:
 
    typedef typename BasicTurbulenceModel::alphaField alphaField;
    typedef typename BasicTurbulenceModel::rhoField rhoField;
    typedef typename BasicTurbulenceModel::transportModel transportModel;
 
 
    // Constructors
 
        //- Construct from components
        ReynoldsStress
        (
            const word& modelName,
            const alphaField& alpha,
            const rhoField& rho,
            const volVectorField& U,
            const surfaceScalarField& alphaRhoPhi,
            const surfaceScalarField& phi,
            const transportModel& transport,
            const word& propertiesName
        );
 
 
    //- Destructor
    virtual ~ReynoldsStress() = default;
 
 
    // Member Functions
 
        //- Re-read model coefficients if they have changed
        virtual bool read() = 0;
 
        //- Return the turbulence viscosity
        virtual tmp<volScalarField> nut() const
        {
            return nut_;
        }
 
        //- Return the turbulence viscosity on patch
        virtual tmp<scalarField> nut(const label patchi) const
        {
            return nut_.boundaryField()[patchi];
        }
 
        //- Return the turbulence kinetic energy
        virtual tmp<volScalarField> k() const;
 
        //- Return the Reynolds stress tensor
        virtual tmp<volSymmTensorField> R() const;
 
        //- Return the effective stress tensor
        virtual tmp<volSymmTensorField> devRhoReff() const;
 
        //- Return the effective stress tensor based on a given velocity field
        virtual tmp<volSymmTensorField> devRhoReff
        (
            const volVectorField& U
        ) const;
 
        //- Return the source term for the momentum equation
        virtual tmp<fvVectorMatrix> divDevRhoReff(volVectorField& U) const;
 
        //- Return the source term for the momentum equation
        virtual tmp<fvVectorMatrix> divDevRhoReff
        (
            const volScalarField& rho,
            volVectorField& U
        ) const;
 
        //- Validate the turbulence fields after construction
        //  Update turbulence viscosity and other derived fields as requires
        virtual void validate();
 
        //- Solve the turbulence equations and correct the turbulence viscosity
        virtual void correct() = 0;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "ReynoldsStress.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //