/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
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    Copyright (C) 2011-2012 OpenFOAM Foundation
-------------------------------------------------------------------------------
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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    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::XiEqModels::instability

Description
    This is the equilibrium level of the flame wrinkling generated by
    instability. It is a constant (default 2.5). It is used in
    \link XiModel.H \endlink.

SourceFiles
    instability.C

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

#ifndef instability_H
#define instability_H

#include "XiEqModel.H"

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

namespace Foam
{
namespace XiEqModels
{

/*---------------------------------------------------------------------------*\
                          Class instability Declaration
\*---------------------------------------------------------------------------*/

class instability
:
    public XiEqModel
{
    // Private data

        //- Equilibrium Xi due to instability only
        scalar XiEqIn;

        //- Equilibrium Xi model due to all other effects
        autoPtr<XiEqModel> XiEqModel_;


    // Private Member Functions

        //- No copy construct
        instability(const instability&) = delete;

        //- No copy assignment
        void operator=(const instability&) = delete;


public:

    //- Runtime type information
    TypeName("instability");


    // Constructors

        //- Construct from components
        instability
        (
            const dictionary& XiEqProperties,
            const psiuReactionThermo& thermo,
            const compressible::RASModel& turbulence,
            const volScalarField& Su
        );


    //- Destructor
    virtual ~instability();


    // Member Functions

        //- Return the flame-wrinkling XiEq
        virtual tmp<volScalarField> XiEq() const;

        //- Update properties from given dictionary
        virtual bool read(const dictionary& XiEqProperties);

};


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

} // End namespace XiEqModels
} // End namespace Foam

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

#endif

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