/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2012 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::basicChemistryModel

Description
    Base class for chemistry models

SourceFiles
    basicChemistryModelI.H
    basicChemistryModel.C

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

#ifndef basicChemistryModel_H
#define basicChemistryModel_H

#include "IOdictionary.H"
#include "Switch.H"
#include "scalarField.H"
#include "volFieldsFwd.H"
#include "volMesh.H"
#include "DimensionedField.H"

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

namespace Foam
{

// Forward declaration of classes
class fvMesh;

/*---------------------------------------------------------------------------*\
                   class basicChemistryModel Declaration
\*---------------------------------------------------------------------------*/

class basicChemistryModel
:
    public IOdictionary
{
    // Private Member Functions

        //- Construct as copy (not implemented)
        basicChemistryModel(const basicChemistryModel&);

        //- Disallow default bitwise assignment
        void operator=(const basicChemistryModel&);


protected:

    // Protected data

        //- Reference to the mesh database
        const fvMesh& mesh_;

        //- Chemistry activation switch
        Switch chemistry_;

        //- Initial chemical time step
        const scalar deltaTChemIni_;

        //- Latest estimation of integration step
        DimensionedField<scalar, volMesh> deltaTChem_;


    // Protected Member Functions

        //- Return non-const access to the latest estimation of integration
        //  step, e.g. for multi-chemistry model
        inline DimensionedField<scalar, volMesh>& deltaTChem();

        //- Correct function - updates due to mesh changes
        void correct();


public:

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


    // Constructors

        //- Construct from mesh
        basicChemistryModel(const fvMesh& mesh);


    //- Destructor
    virtual ~basicChemistryModel();


    // Member Functions

        //- Return const access to the mesh database
        inline const fvMesh& mesh() const;

        //- Chemistry activation switch
        inline Switch chemistry() const;

        //- Return the latest estimation of integration step
        inline const DimensionedField<scalar, volMesh>& deltaTChem() const;


        // Functions to be derived in derived classes

            // Fields

                //- Return const access to chemical source terms [kg/m3/s]
                virtual tmp<volScalarField> RR(const label i) const = 0;


            // Chemistry solution

                //- Calculates the reaction rates
                virtual void calculate() = 0;

                //- Solve the reaction system for the given start time and
                //  timestep and return the characteristic time
                virtual scalar solve(const scalar t0, const scalar deltaT) = 0;

                //- Return the chemical time scale
                virtual tmp<volScalarField> tc() const = 0;

                //- Return source for enthalpy equation [kg/m/s3]
                virtual tmp<volScalarField> Sh() const = 0;

                //- Return the heat release, i.e. enthalpy/sec [m2/s3]
                virtual tmp<volScalarField> dQ() const = 0;
};


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

} // End namespace Foam

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

#include "basicChemistryModelI.H"

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

#endif

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