basicXiSubG.H

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License
    This file is part of OpenFOAM.
 
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Class
    Foam::XiGModels::basicSubGrid
 
Description
 
    Basic sub-grid obstacle flame-wrinking generation rate coefficient model.
    Details supplied by J Puttock 2/7/06.
 
    \f$ G_{sub} \f$ denotes the generation coefficient and it is given by
 
    \f[
        G_{sub} = k_{1} /frac{\vert \dwea{\vec{U}} \vert}{L_{obs}}
                 \frac{/Xi_{{sub}_{eq}}-1}{/Xi_{sub}}
    \f]
 
    and the removal:
 
    \f[
        - k_{1} /frac{\vert \dwea{\vec{U}} \vert}{L_{sub}}
        \frac{\Xi_{sub}-1}{\Xi_{sub}}
    \f]
 
    Finally, \f$ G_{sub} \f$ is added to generation rate \f$ G_{in} \f$
    due to the turbulence.
 
SourceFiles
    basicSubGrid.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef basicSubGrid_H
#define basicSubGrid_H
 
#include "XiGModel.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace XiGModels
{
 
/*---------------------------------------------------------------------------*\
                        Class basicSubGrid Declaration
\*---------------------------------------------------------------------------*/
 
class basicSubGrid
:
    public XiGModel
{
    // Private data
 
        //- Sub-grid generation rate coefficient
        scalar k1;
 
        //- Xi generation rate model due to turbulence
        autoPtr<XiGModel> XiGModel_;
 
 
    // Private Member Functions
 
        //- Disallow copy construct
        basicSubGrid(const basicSubGrid&);
 
        //- Disallow default bitwise assignment
        void operator=(const basicSubGrid&);
 
 
public:
 
    //- Runtime type information
    TypeName("basicSubGridG");
 
 
    // Constructors
 
        //- Construct from components
        basicSubGrid
        (
            const dictionary& XiGProperties,
            const psiuReactionThermo& thermo,
            const compressible::RASModel& turbulence,
            const volScalarField& Su
        );
 
 
    //- Destructor
    virtual ~basicSubGrid();
 
 
    // Member Functions
 
        //- Return the flame-wrinking generation rate
        virtual tmp<volScalarField> G() const;
 
        //- Return the flame diffusivity
        virtual tmp<volScalarField> Db() const;
 
        //- Update properties from given dictionary
        virtual bool read(const dictionary& XiGProperties);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace XiGModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //