DeardorffDiffStress.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
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Class
    Foam::LESModels::DeardorffDiffStress
 
Group
    grpLESTurbulence
 
Description
    Differential SGS Stress Equation Model for incompressible and
    compressible flows
 
    Reference:
    \verbatim
        Deardorff, J. W. (1973).
        The use of subgrid transport equations in a three-dimensional model
        of atmospheric turbulence.
        Journal of Fluids Engineering, 95(3), 429-438.
    \endverbatim
 
    This SGS model uses a full balance equation for the SGS stress tensor to
    simulate the behaviour of B.
 
    This implementation is as described in the above paper except that the
    triple correlation model of Donaldson is replaced with the generalized
    gradient diffusion model of Daly and Harlow:
    \verbatim
        Daly, B. J., & Harlow, F. H. (1970).
        Transport equations in turbulence.
        Physics of Fluids (1958-1988), 13(11), 2634-2649.
    \endverbatim
    with the default value for the coefficient Cs of 0.25 from
    \verbatim
        Launder, B. E., Reece, G. J., & Rodi, W. (1975).
        Progress in the development of a Reynolds-stress turbulence closure.
        Journal of fluid mechanics, 68(03), 537-566.
    \endverbatim
 
SourceFiles
    DeardorffDiffStress.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef DeardorffDiffStress_H
#define DeardorffDiffStress_H
 
#include "LESModel.H"
#include "ReynoldsStress.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace LESModels
{
 
/*---------------------------------------------------------------------------*\
                    Class DeardorffDiffStress Declaration
\*---------------------------------------------------------------------------*/
 
template<class BasicTurbulenceModel>
class DeardorffDiffStress
:
    public ReynoldsStress<LESModel<BasicTurbulenceModel>>
{
    // Private Member Functions
 
        //- No copy construct
        DeardorffDiffStress(const DeardorffDiffStress&) = delete;
 
        //- No copy assignment
        void operator=(const DeardorffDiffStress&) = delete;
 
 
protected:
 
    // Protected data
 
        // Model constants
 
            dimensionedScalar Ck_;
            dimensionedScalar Cm_;
            dimensionedScalar Ce_;
            dimensionedScalar Cs_;
 
 
    // Protected Member Functions
 
        //- Update the eddy-viscosity
        virtual void correctNut();
 
 
public:
 
    typedef typename BasicTurbulenceModel::alphaField alphaField;
    typedef typename BasicTurbulenceModel::rhoField rhoField;
    typedef typename BasicTurbulenceModel::transportModel transportModel;
 
 
    //- Runtime type information
    TypeName("DeardorffDiffStress");
 
 
    // Constructors
 
        //- Constructor from components
        DeardorffDiffStress
        (
            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 ~DeardorffDiffStress() = default;
 
 
    // Member Functions
 
        //- Read model coefficients if they have changed
        virtual bool read();
 
        //- Correct sub-grid stress, eddy-Viscosity and related properties
        virtual void correct();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace LESModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "DeardorffDiffStress.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //