alphatWallBoilingWallFunctionFvPatchScalarField.H

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Class
    Foam::compressible::alphatWallBoilingWallFunctionFvPatchScalarField

Description
    A thermal wall function for simulation of subcooled nucleate wall boiling
    with runtime selctable submodels for:
      - wall heat flux partitioning model
      - nucleation site density
      - bubble departure frequency
      - bubble departure diameter

    Implements a version of the well-known RPI wall boiling model
    (Kurul & Podowski, 1991). The model implementation is similar to the model
    described by Peltola & Pättikangas (2012) but has been extended with the
    wall heat flux partitioning models.

    References:
    \verbatim
        "On the modeling of multidimensional effects in boiling channels"
        Kurul, N., Podowski, M.Z.,
        ANS Proceedings, National Heat Transfer Conference,
        Minneapolis, Minnesota, USA, July 28-31, 1991,
        ISBN: 0-89448-162-1, pp. 30-40
    \endverbatim

    \verbatim
        "Development and validation of a boiling model for OpenFOAM
        multiphase solver"
        Peltola, J., Pättikangas, T.J.H.,
        CFD4NRS-4 Conference Proceedings, paper 59,
        Daejeon, Korea, September 10-12 2012
    \endverbatim

Usage
    \table
        Property     | Description             | Required    | Default value
        phaseType    | 'vapor' or 'liquid'     | yes         |
        relax        |wall boiling model relaxation| yes     |
        Prt          | inherited from alphatPhaseChangeJayatillekeWallFunction
        Cmu          | inherited from alphatPhaseChangeJayatillekeWallFunction
        kappa        | inherited from alphatPhaseChangeJayatillekeWallFunction
        E            | inherited from alphatPhaseChangeJayatillekeWallFunction
        dmdt         | phase change mass flux  | yes         |
        value        | initial alphat value    | yes         |

        if phaseType 'vapor':

        partitioningModel|                     | yes         |

        if phaseType 'liquid':

        partitioningModel|                     | yes         |
        nucleationSiteModel|                     | yes         |
        departureDiamModel|                     | yes         |
        departureFreqModel|                     | yes         |
    \endtable

    NOTE: Runtime selectabale submodels may require model specific entries

    Example usage:
    \verbatim
    hotWall
    {
        type            compressible::alphatWallBoiling2WallFunction;
        phaseType       liquid;
        Prt             0.85;
        Cmu             0.09;
        kappa           0.41;
        E               9.8;
        relax           0.001;
        dmdt            uniform 0;
        partitioningModel
        {
            type        Lavieville;
            alphaCrit   0.2;
        }
        nucleationSiteModel
        {
            type        LemmertChawla;
        }
        departureDiamModel
        {
            type        TolubinskiKostanchuk;
        }
        departureFreqModel
        {
            type        Cole;
        }
        value           uniform 0.01;
    \endverbatim

See also
    Foam::alphatPhaseChangeJayatillekeWallFunctionFvPatchField

SourceFiles
    alphatWallBoilingWallFunctionFvPatchScalarField.C

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

#ifndef compressible_alphatWallBoilingWallFunctionFvPatchScalarField_H
#define compressible_alphatWallBoilingWallFunctionFvPatchScalarField_H

#include "alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField.H"
#include "partitioningModel.H"
#include "nucleationSiteModel.H"
#include "departureDiameterModel.H"
#include "departureFrequencyModel.H"

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

namespace Foam
{
namespace compressible
{

/*---------------------------------------------------------------------------*\
            Class alphatWallBoilingWallFunctionFvPatchScalarField Declaration
\*---------------------------------------------------------------------------*/

class alphatWallBoilingWallFunctionFvPatchScalarField
:
    public alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField
{
public:

    // Data types

        //- Enumeration listing the possible operational modes
        enum phaseType
        {
            vaporPhase,
            liquidPhase
        };


private:

    // Private data

        //- name of the other phase (vapor/liquid phase)
        word otherPhaseName_;

        //- Heat source type names
        static const NamedEnum<phaseType, 2> phaseTypeNames_;

        //- Heat source type
        phaseType phaseType_;

        //- dmdt relaxationFactor
        scalar relax_;

        //- Patch face area by cell volume
        scalarField AbyV_;

        //- Convective turbulent thermal diffusivity
        scalarField alphatConv_;

        //- Departure diameter field
        scalarField dDep_;

        //- Quenching surface heat flux
        scalarField qq_;

        //- Run-time selected heat flux partitioning model
        autoPtr<wallBoilingModels::partitioningModel>
            partitioningModel_;

        //- Run-time selected nucleation site density model
        autoPtr<wallBoilingModels::nucleationSiteModel>
            nucleationSiteModel_;

        //- Run-time selected bubble departure diameter model
        autoPtr<wallBoilingModels::departureDiameterModel>
            departureDiamModel_;

        //- Run-time selected bubble departure frequency model
        autoPtr<wallBoilingModels::departureFrequencyModel>
            departureFreqModel_;


public:

    //- Runtime type information
    TypeName("compressible::alphatWallBoilingWallFunction");


    // Constructors

        //- Construct from patch and internal field
        alphatWallBoilingWallFunctionFvPatchScalarField
        (
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&
        );

        //- Construct from patch, internal field and dictionary
        alphatWallBoilingWallFunctionFvPatchScalarField
        (
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const dictionary&
        );

        //- Construct by mapping given
        //  alphatWallBoilingWallFunctionFvPatchScalarField
        //  onto a new patch
        alphatWallBoilingWallFunctionFvPatchScalarField
        (
            const alphatWallBoilingWallFunctionFvPatchScalarField&,
            const fvPatch&,
            const DimensionedField<scalar, volMesh>&,
            const fvPatchFieldMapper&
        );

        //- Construct as copy
        alphatWallBoilingWallFunctionFvPatchScalarField
        (
            const alphatWallBoilingWallFunctionFvPatchScalarField&
        );

        //- Construct and return a clone
        virtual tmp<fvPatchScalarField> clone() const
        {
            return tmp<fvPatchScalarField>
            (
                new alphatWallBoilingWallFunctionFvPatchScalarField(*this)
            );
        }

        //- Construct as copy setting internal field reference
        alphatWallBoilingWallFunctionFvPatchScalarField
        (
            const alphatWallBoilingWallFunctionFvPatchScalarField&,
            const DimensionedField<scalar, volMesh>&
        );

        //- Construct and return a clone setting internal field reference
        virtual tmp<fvPatchScalarField> clone
        (
            const DimensionedField<scalar, volMesh>& iF
        ) const
        {
            return tmp<fvPatchScalarField>
            (
                new alphatWallBoilingWallFunctionFvPatchScalarField(*this, iF)
            );
        }


    // Member functions

        using alphatPhaseChangeWallFunctionFvPatchScalarField::dmdt;

        //- Is there phase change mass transfer for this phasePair
        virtual bool activePhasePair(const phasePairKey&) const;

        //- Return the rate of phase-change for specific phase pair
        virtual const scalarField& dmdt(const phasePairKey&) const;

        //- Return the rate of phase-change for specific phase pair
        virtual const scalarField& mDotL(const phasePairKey&) const;

        //- Return the departure diameter field
        const scalarField& dDeparture() const
        {
            return dDep_;
        }

        //- Return the quenching surface heat flux [W/m2]
        const scalarField& qq() const
        {
            return qq_;
        }

        //- Return the evaporation surface heat flux [W/m2]
        tmp<scalarField> qe() const
        {
            return mDotL_/AbyV_;
        }

        // Evaluation functions

            //- Update the coefficients associated with the patch field
            virtual void updateCoeffs();


        // I-O

            //- Write
            virtual void write(Ostream&) const;
};


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

} // End namespace compressible
} // End namespace Foam

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

#endif

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