kineticTheoryModel.H

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    Copyright (C) 2020 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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    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::kineticTheoryModel
 
Description
    Kinetic theory particle phase RAS model
 
    Reference:
    \verbatim
        "Derivation, implementation, and validation of computer simulation
         models for gas-solid fluidized beds",
        van Wachem, B.G.M.,
        Ph.D. Thesis, Delft University of Technology, Amsterdam, 2000.
    \endverbatim
 
    There are no default model coefficients.
 
SourceFiles
    kineticTheoryModel.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef kineticTheoryModel_H
#define kineticTheoryModel_H
 
#include "RASModel.H"
#include "eddyViscosity.H"
#include "phaseCompressibleTurbulenceModel.H"
#include "EddyDiffusivity.H"
#include "phaseModel.H"
#include "dragModel.H"
#include "viscosityModel.H"
#include "conductivityModel.H"
#include "radialModel.H"
#include "granularPressureModel.H"
#include "frictionalStressModel.H"
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace RASModels
{
 
/*---------------------------------------------------------------------------*\
                           Class kineticTheoryModel Declaration
\*---------------------------------------------------------------------------*/
 
class kineticTheoryModel
:
    public eddyViscosity
    <
        RASModel<EddyDiffusivity<phaseCompressibleTurbulenceModel>>
    >
{
    // Private data
 
        // Input Fields
 
            const phaseModel& phase_;
 
 
        // Sub-models
 
            //- Run-time selected viscosity model
            autoPtr<kineticTheoryModels::viscosityModel> viscosityModel_;
 
            //- Run-time selected conductivity model
            autoPtr<kineticTheoryModels::conductivityModel> conductivityModel_;
 
            //- Run-time selected radial distribution model
            autoPtr<kineticTheoryModels::radialModel> radialModel_;
 
            //- Run-time selected granular pressure model
            autoPtr<kineticTheoryModels::granularPressureModel>
                granularPressureModel_;
 
            //- Run-time selected frictional stress model
            autoPtr<kineticTheoryModels::frictionalStressModel>
                frictionalStressModel_;
 
 
        // Kinetic Theory Model coefficients
 
            //- Use equilibrium approximation: generation == dissipation
            bool equilibrium_;
 
            //- Coefficient of restitution
            dimensionedScalar e_;
 
            //- Maximum packing phase-fraction
            dimensionedScalar alphaMax_;
 
            //- Min value for which the frictional stresses are zero
            dimensionedScalar alphaMinFriction_;
 
            //- Residual phase fraction
            dimensionedScalar residualAlpha_;
 
            //- Maximum turbulent viscosity
            dimensionedScalar maxNut_;
 
 
        // Kinetic Theory Model Fields
 
            //- The granular energy/temperature
            volScalarField Theta_;
 
            //- The granular bulk viscosity
            volScalarField lambda_;
 
            //- The granular radial distribution
            volScalarField gs0_;
 
            //- The granular "thermal" conductivity
            volScalarField kappa_;
 
            //- The frictional viscosity
            volScalarField nuFric_;
 
 
    // Private Member Functions
 
        void correctNut()
        {}
 
        //- No copy construct
        kineticTheoryModel(const kineticTheoryModel&) = delete;
 
        //- No copy assignment
        void operator=(const kineticTheoryModel&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("kineticTheory");
 
 
    // Constructors
 
        //- Construct from components
        kineticTheoryModel
        (
            const volScalarField& alpha,
            const volScalarField& rho,
            const volVectorField& U,
            const surfaceScalarField& alphaRhoPhi,
            const surfaceScalarField& phi,
            const phaseModel& transport,
            const word& propertiesName = turbulenceModel::propertiesName,
            const word& type = typeName
        );
 
 
    //- Destructor
    virtual ~kineticTheoryModel();
 
 
    // Member Functions
 
        //- Re-read model coefficients if they have changed
        virtual bool read();
 
        //- Return the effective viscosity
        virtual tmp<volScalarField> nuEff() const
        {
            return this->nut();
        }
 
        //- Return the effective viscosity on patch
        virtual tmp<scalarField> nuEff(const label patchi) const
        {
            return this->nut(patchi);
        }
 
        //- Return the turbulence kinetic energy
        virtual tmp<volScalarField> k() const;
 
        //- Return the turbulence kinetic energy dissipation rate
        virtual tmp<volScalarField> epsilon() const;
 
        //- Return the specific dissipation rate
        virtual tmp<volScalarField> omega() const;
 
        //- Return the Reynolds stress tensor
        virtual tmp<volSymmTensorField> R() const;
 
        //- Return the phase-pressure'
        // (derivative of phase-pressure w.r.t. phase-fraction)
        virtual tmp<volScalarField> pPrime() const;
 
        //- Return the face-phase-pressure'
        // (derivative of phase-pressure w.r.t. phase-fraction)
        virtual tmp<surfaceScalarField> pPrimef() 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;
 
        //- Solve the kinetic theory equations and correct the viscosity
        virtual void correct();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace RASModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //