phaseLimitStabilisation.H

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License
    This file is part of OpenFOAM.

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    the Free Software Foundation, either version 3 of the License, or
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Class
    Foam::fv::phaseLimitStabilisation

Description
    Stabilisation source for phase transport equations

    Applies an implicit source to the phase transport equation for the specified
    \c field when the phase volume fraction is below \c residualAlpha.  The
    stabilisation rate is provided by the registered
    uniformDimensionedScalarField \c rate, which could be extended to also
    support volScalarField and volScalarField::Internal field types.  The \c
    field is currently stabilised towards zero in the limit of the phase volume
    fraction approaching zero but this could be extended to support a
    specified value or a value or field looked-up from the database.

Usage
    Example usage:
    \verbatim
    stabilisation
    {
        type            phaseLimitStabilisation;

        field           sigma.liquid;

        rate            rLambda.liquid;
        residualAlpha   1e-3;
    }
    \endverbatim

SourceFiles
    phaseLimitStabilisation.C

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

#ifndef phaseLimitStabilisation_H
#define phaseLimitStabilisation_H

#include "fvModel.H"

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

namespace Foam
{
namespace fv
{

/*---------------------------------------------------------------------------*\
                   Class phaseLimitStabilisation Declaration
\*---------------------------------------------------------------------------*/

class phaseLimitStabilisation
:
    public fvModel
{
    // Private Data

        //- Field name
        word fieldName_;

        //- Rate field name
        word rateName_;

        //- Residual alpha value below which stabilisation is applied
        scalar residualAlpha_;


    // Private Member Functions

        //- Non-virtual read
        void readCoeffs();

        //- Add source terms to a phase equation
        template<class Type>
        void addSupType
        (
            const volScalarField& alpha,
            const volScalarField& rho,
            fvMatrix<Type>& eqn,
            const word& fieldName
        ) const;


public:

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


    // Constructors

        //- Construct from components
        phaseLimitStabilisation
        (
            const word& name,
            const word& modelType,
            const dictionary& dict,
            const fvMesh& mesh
        );

        //- Disallow default bitwise copy construction
        phaseLimitStabilisation(const phaseLimitStabilisation&) = delete;


    //- Destructor
    virtual ~phaseLimitStabilisation()
    {}


    // Member Functions

        // Checks

            //- Return the list of fields for which the fvModel adds source term
            //  to the transport equation
            virtual wordList addSupFields() const;


        // Sources

            //- Add a source term to a phase equation
            FOR_ALL_FIELD_TYPES(DEFINE_FV_MODEL_ADD_ALPHA_RHO_SUP);


        //- Read dictionary
        virtual bool read(const dictionary& dict);


    // Member Operators

        //- Disallow default bitwise assignment
        void operator=(const phaseLimitStabilisation&) = delete;
};


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

} // End namespace fv
} // End namespace Foam

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

#endif

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