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License
    This file is part of OpenFOAM.

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    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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Class
    Foam::diameterModels::IATE

Description
    IATE (Interfacial Area Transport Equation) bubble diameter model.

    Solves for the interfacial curvature per unit volume of the phase rather
    than interfacial area per unit volume to avoid stability issues relating to
    the consistency requirements between the phase fraction and interfacial area
    per unit volume.  In every other respect this model is as presented in the
    paper:

    Reference:
    \verbatim
        Ishii, M., Kim, S., & Kelly, J. (2005).
        Development of interfacial area transport equation.
        Nuclear Engineering and Technology, 37(6), 525-536.
    \endverbatim

SourceFiles
    IATE.C

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

#ifndef IATE_H
#define IATE_H

#include "diameterModel.H"

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

namespace Foam
{
namespace diameterModels
{

// Forward declaration of classes
class IATEsource;

/*---------------------------------------------------------------------------*\
                           Class IATE Declaration
\*---------------------------------------------------------------------------*/

class IATE
:
    public diameterModel
{
    // Private Data

        //- Interfacial curvature (alpha*interfacial area)
        volScalarField kappai_;

        //- Maximum diameter used for stabilisation in the limit kappai->0
        dimensionedScalar dMax_;

        //- Minimum diameter used for stabilisation in the limit kappai->inf
        dimensionedScalar dMin_;

        //- Residual phase fraction
        dimensionedScalar residualAlpha_;

        //- The Sauter-mean diameter of the phase
        volScalarField d_;

        //- IATE sources
        PtrList<IATEsource> sources_;


    // Private Member Functions

        tmp<volScalarField> dsm() const;


public:

    friend class IATEsource;

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


    // Constructors

        //- Construct from components
        IATE
        (
            const dictionary& diameterProperties,
            const phaseModel& phase
        );


    //- Destructor
    virtual ~IATE();


    // Member Functions

        //- Return the interfacial curvature
        const volScalarField& kappai() const
        {
            return kappai_;
        }

        //- Return the interfacial area
        tmp<volScalarField> a() const
        {
            return phase_*kappai_;
        }

        //- Return the Sauter-mean diameter
        virtual tmp<volScalarField> d() const
        {
            return d_;
        }

        //- Correct the diameter field
        virtual void correct();

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


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

} // End namespace diameterModels
} // End namespace Foam

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

#endif

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