dynamicLagrangian.H

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    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2019 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::dynamicLagrangian
 
Group
    grpLESTurbulence
 
Description
    Dynamic SGS model with Lagrangian averaging
 
    Reference:
    \verbatim
        Meneveau, C., Lund, T. S., & Cabot, W. H. (1996).
        A Lagrangian dynamic subgrid-scale model of turbulence.
        Journal of Fluid Mechanics, 319, 353-385.
    \endverbatim
 
SourceFiles
    dynamicLagrangian.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef dynamicLagrangian_H
#define dynamicLagrangian_H
 
#include "LESeddyViscosity.H"
#include "simpleFilter.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace LESModels
{
 
/*---------------------------------------------------------------------------*\
                       Class dynamicLagrangian Declaration
\*---------------------------------------------------------------------------*/
 
template<class BasicTurbulenceModel>
class dynamicLagrangian
:
    public LESeddyViscosity<BasicTurbulenceModel>
{
    // Private Member Functions
 
        //- No copy construct
        dynamicLagrangian(const dynamicLagrangian&) = delete;
 
        //- No copy assignment
        void operator=(const dynamicLagrangian&) = delete;
 
 
protected:
 
    // Protected data
 
        volScalarField flm_;
        volScalarField fmm_;
 
        dimensionedScalar theta_;
 
        simpleFilter simpleFilter_;
        autoPtr<LESfilter> filterPtr_;
        LESfilter& filter_;
 
        dimensionedScalar flm0_;
        dimensionedScalar fmm0_;
 
 
    // Protected Member Functions
 
        //- Update sub-grid eddy-viscosity
        void correctNut(const tmp<volTensorField>& gradU);
 
        virtual void correctNut();
 
 
public:
 
    typedef typename BasicTurbulenceModel::alphaField alphaField;
    typedef typename BasicTurbulenceModel::rhoField rhoField;
    typedef typename BasicTurbulenceModel::transportModel transportModel;
 
    //- Runtime type information
    TypeName("dynamicLagrangian");
 
 
    // Constructors
 
        //- Construct from components
        dynamicLagrangian
        (
            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 ~dynamicLagrangian() = default;
 
 
    // Member Functions
 
        //- Read model coefficients if they have changed
        virtual bool read();
 
        //- Return SGS kinetic energy
        tmp<volScalarField> k(const tmp<volTensorField>& gradU) const
        {
            return
                pow(2.0*flm_/fmm_, 2.0/3.0)
              * pow(this->Ce_, -2.0/3.0)
              * sqr(this->delta())*magSqr(dev(symm(gradU)));
        }
 
        //- Return SGS kinetic energy
        virtual tmp<volScalarField> k() const
        {
            return k(fvc::grad(this->U_));
        }
 
        //- 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 "dynamicLagrangian.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //