nonUnityLewisEddyDiffusivity.H

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Class
    Foam::turbulenceThermophysicalTransportModels::nonUnityLewisEddyDiffusivity
 
Description
    Non-unity-Lewis-Eddy-diffusivity based temperature gradient heat flux model
    for RAS or LES of turbulent flow. Allows independent specification of
    turbulent Prandtl and Schmidt numbers.  Unity laminar Lewis number is
    assumed.
 
    The heat flux source is implemented as an implicit energy correction to the
    temperature gradient based flux source.  At convergence the energy
    correction is 0.
 
Usage
    \verbatim
    LES
    {
        model           nonUnityLewisEddyDiffusivity;
        Prt             0.85;
        Sct             0.7;
    }
    \endverbatim
 
SourceFiles
    nonUnityLewisEddyDiffusivity.C
 
\*---------------------------------------------------------------------------*/
 
#include "unityLewisEddyDiffusivity.H"
 
#ifndef nonUnityLewisEddyDiffusivity_H
#define nonUnityLewisEddyDiffusivity_H
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace turbulenceThermophysicalTransportModels
{
 
/*---------------------------------------------------------------------------*\
                Class nonUnityLewisEddyDiffusivity Declaration
\*---------------------------------------------------------------------------*/
 
template<class TurbulenceThermophysicalTransportModel>
class nonUnityLewisEddyDiffusivity
:
    public unityLewisEddyDiffusivity<TurbulenceThermophysicalTransportModel>
{
 
protected:
 
    // Protected data
 
        // Model coefficients
 
            //- Turbulent Schmidt number []
            dimensionedScalar Sct_;
 
 
public:
 
    typedef typename TurbulenceThermophysicalTransportModel::alphaField
        alphaField;
 
    typedef typename
        TurbulenceThermophysicalTransportModel::momentumTransportModel
        momentumTransportModel;
 
    typedef typename TurbulenceThermophysicalTransportModel::thermoModel
        thermoModel;
 
 
    //- Runtime type information
    TypeName("nonUnityLewisEddyDiffusivity");
 
 
    // Constructors
 
        //- Construct from a momentum transport model and a thermo model
        nonUnityLewisEddyDiffusivity
        (
            const momentumTransportModel& momentumTransport,
            const thermoModel& thermo
        );
 
 
    //- Destructor
    virtual ~nonUnityLewisEddyDiffusivity()
    {}
 
 
    // Member Functions
 
        //- Read thermophysicalTransport dictionary
        virtual bool read();
 
        //- Effective mass diffusion coefficient
        //  for a given specie mass-fraction [kg/m/s]
        virtual tmp<volScalarField> DEff(const volScalarField& Yi) const
        {
            return volScalarField::New
            (
                "DEff",
                this->thermo().kappa()/this->thermo().Cp()
              + (this->Prt_/Sct_)*this->alphat()
            );
        }
 
        //- Effective mass diffusion coefficient
        //  for a given specie mass-fraction for patch [kg/m/s]
        virtual tmp<scalarField> DEff
        (
            const volScalarField& Yi,
            const label patchi
        ) const
        {
            return
                this->thermo().kappa().boundaryField()[patchi]
               /this->thermo().Cp().boundaryField()[patchi]
              + this->Prt_.value()/Sct_.value()*this->alphat(patchi);
        }
 
        //- Return the heat flux [W/m^2]
        virtual tmp<surfaceScalarField> q() const;
 
        //- Return the source term for the energy equation
        virtual tmp<fvScalarMatrix> divq(volScalarField& he) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace turbulenceThermophysicalTransportModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "nonUnityLewisEddyDiffusivity.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //