/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright held by original author
     \\/     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 2 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, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

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

#include "Gulder.H"
#include "addToRunTimeSelectionTable.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
namespace XiEqModels
{
    defineTypeNameAndDebug(Gulder, 0);
    addToRunTimeSelectionTable(XiEqModel, Gulder, dictionary);
};
};


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::XiEqModels::Gulder::Gulder
(
    const dictionary& XiEqProperties,
    const hhuCombustionThermo& thermo,
    const compressible::RASModel& turbulence,
    const volScalarField& Su
)
:
    XiEqModel(XiEqProperties, thermo, turbulence, Su),
    XiEqCoef(readScalar(XiEqModelCoeffs_.lookup("XiEqCoef"))),
    SuMin(0.01*Su.average())
{}


// * * * * * * * * * * * * * * * * Destructors * * * * * * * * * * * * * * * //

Foam::XiEqModels::Gulder::~Gulder()
{}


// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //

Foam::tmp<Foam::volScalarField> Foam::XiEqModels::Gulder::XiEq() const
{
    volScalarField up = sqrt((2.0/3.0)*turbulence_.k());
    const volScalarField& epsilon = turbulence_.epsilon();

    volScalarField tauEta = sqrt(mag(thermo_.muu()/(thermo_.rhou()*epsilon)));

    volScalarField Reta = up/
    (
        sqrt(epsilon*tauEta)
      + dimensionedScalar("1e-8", up.dimensions(), 1e-8)
    );

    return 1.0 + XiEqCoef*sqrt(up/(Su_ + SuMin))*Reta;
}


bool Foam::XiEqModels::Gulder::read(const dictionary& XiEqProperties)
{
    XiEqModel::read(XiEqProperties);

    XiEqModelCoeffs_.lookup("XiEqCoef") >> XiEqCoef;

    return true;
}


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