COxidationHurtMitchell.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) 2012-2018 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::COxidationHurtMitchell

Description
    Char oxidation model given by Hurt and Mitchell:

    Based on the reference:
        Hurt R. and Mitchell R., "Unified high-temperature char combustion
        kinetics for a suite of coals of various rank", 24th Symposium in
        Combustion, The Combustion Institute, 1992, p 1243-1250

    Model specifies the rate of char combustion.

        C(s) + Sb*O2 -> CO2

    where Sb is the stoichiometry of the reaction

    Model validity:
        Gas temperature: Tc > 1500 K
        Particle sizes:  75 um -> 200 um
        Pox > 0.3 atm

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

#ifndef COxidationHurtMitchell_H
#define COxidationHurtMitchell_H

#include "SurfaceReactionModel.H"

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

namespace Foam
{

// Forward class declarations
template<class CloudType>
class COxidationHurtMitchell;

/*---------------------------------------------------------------------------*\
                  Class COxidationHurtMitchell Declaration
\*---------------------------------------------------------------------------*/

template<class CloudType>
class COxidationHurtMitchell
:
    public SurfaceReactionModel<CloudType>
{
    // Private data

        // Model constants

            //- Stoichiometry of reaction
            const scalar Sb_;


        // Addressing

            //- Cs position in global/local lists
            label CsLocalId_;

            //- Ash position in global/local lists
            label ashLocalId_;

            //- O2 position in global list
            label O2GlobalId_;

            //- CO2 positions in global list
            label CO2GlobalId_;


        // Local copies of thermo properties

            //- Molecular weight of C [kg/kmol]
            scalar WC_;

            //- Molecular weight of O2 [kg/kmol]
            scalar WO2_;

            //- Formation enthalpy for CO2 [J/kg]
            scalar HcCO2_;

            //- Heat of reaction [J/kg] (optional)
            scalar heatOfReaction_;


public:

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


    // Constructors

        //- Construct from dictionary
        COxidationHurtMitchell
        (
            const dictionary& dict,
            CloudType& owner
        );

        //- Construct copy
        COxidationHurtMitchell
        (
            const COxidationHurtMitchell<CloudType>& srm
        );

        //- Construct and return a clone
        virtual autoPtr<SurfaceReactionModel<CloudType>> clone() const
        {
            return autoPtr<SurfaceReactionModel<CloudType>>
            (
                new COxidationHurtMitchell<CloudType>(*this)
            );
        }


    //- Destructor
    virtual ~COxidationHurtMitchell();


    // Member Functions

        //- Update surface reactions
        virtual scalar calculate
        (
            const scalar dt,
            const label celli,
            const scalar d,
            const scalar T,
            const scalar Tc,
            const scalar pc,
            const scalar rhoc,
            const scalar mass,
            const scalarField& YGas,
            const scalarField& YLiquid,
            const scalarField& YSolid,
            const scalarField& YMixture,
            const scalar N,
            scalarField& dMassGas,
            scalarField& dMassLiquid,
            scalarField& dMassSolid,
            scalarField& dMassSRCarrier
        ) const;
};


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

} // End namespace Foam

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

#ifdef NoRepository
    #include "COxidationHurtMitchell.C"
#endif

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

#endif

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