nonUnityLewisEddyDiffusivity.H

Go to the documentation of this file.

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2020 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::turbulenceThermophysicalTransportModels::nonUnityLewisEddyDiffusivity

Description
    Non-unity-Lewis-Eddy-diffusivity based gradient heat flux model for RAS or
    LES of turbulent flow. Allows independent specification of turbulent
    Prandtl and Schmidt numbers. The laminar Lewis number is still assumed to
    equal one.

Usage
    \verbatim
    LES
    {
        model           nonUnityLewisEddyDiffusivity;
        Prt             0.85;
        Sct             0.7;
    }
    \endverbatim

SourceFiles
    nonUnityLewisEddyDiffusivity.C

\*---------------------------------------------------------------------------*/

#include "eddyDiffusivity.H"

#ifndef nonUnityLewisEddyDiffusivity_H
#define nonUnityLewisEddyDiffusivity_H

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{
namespace turbulenceThermophysicalTransportModels
{

/*---------------------------------------------------------------------------*\
                   Class nonUnityLewisEddyDiffusivity Declaration
\*---------------------------------------------------------------------------*/

template<class TurbulenceThermophysicalTransportModel>
class nonUnityLewisEddyDiffusivity
:
    public eddyDiffusivity<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 diffusivity for a given specie mass-fraction [kg/m/s]
        virtual tmp<volScalarField> DEff(const volScalarField& Yi) const
        {
            return volScalarField::New
            (
                "DEff",
                this->thermo().alphaEff(this->Prt_/Sct_*this->alphat())
            );
        }

        //- Effective mass diffusivity 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().alphaEff
            (
                this->Prt_.value()/Sct_.value()*this->alphat(patchi),
                patchi
            );
        }

        //- Return the heat flux
        virtual tmp<volVectorField> 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

// ************************************************************************* //