greyDiffusiveRadiationMixedFvPatchScalarField.H

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    Copyright (C) 2016-2022 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
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    the Free Software Foundation, either version 3 of the License, or
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Class
    Foam::radiation::greyDiffusiveRadiationMixedFvPatchScalarField

Group
    grpThermoBoundaryConditions

Description
    This boundary condition provides a grey-diffuse condition for radiation
    intensity, \c I, for use with the finite-volume discrete-ordinates model
    (fvDOM), in which the radiation temperature is retrieved from the
    temperature field boundary condition.

    An external radiative heat flux can be added using \c qRadExt. If
    \c qRadExtDir is specified, this ray closest to this direction is used.
    Otherwise, the face normal is used as direction to set \c qRadExt.

Usage
    Example of the boundary condition specification:
    \verbatim
    <patchName>
    {
        // Mandatory entries
        type            greyDiffusiveRadiation;

        // Optional entries
        T               T;
        qRadExt         <scalar>;
        qRadExtDir      <vector>;

        // Inherited entries
        ...
    }
    \endverbatim

    where the entries mean:
    \table
      Property | Description                            | Type  | Reqd | Deflt
      type     | Type name: greyDiffusiveRadiation      | word  | yes  | -
      T        | Name of temperature field              | word  | no   | T
      qRadExt  | Radiative external flux                | scalar | no  | Zero
      qRadExtDir | Radiative external flux direction    | vector | no  | Zero
    \endtable

    The inherited entries are elaborated in:
      - \link mixedFvPatchFields.H \endlink

See also
  - Foam::radiation::radiationModel
  - Foam::radiation::fvDOM
  - Foam::radiationCoupledBase
  - Foam::mixedFvPatchField

SourceFiles
    greyDiffusiveRadiationMixedFvPatchScalarField.C

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

#ifndef radiation_greyDiffusiveRadiationMixedFvPatchScalarField_H
#define radiation_greyDiffusiveRadiationMixedFvPatchScalarField_H

#include "mixedFvPatchFields.H"

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

namespace Foam
{
namespace radiation
{
/*---------------------------------------------------------------------------*\
        Class greyDiffusiveRadiationMixedFvPatchScalarField Declaration
\*---------------------------------------------------------------------------*/

class greyDiffusiveRadiationMixedFvPatchScalarField
:
    public mixedFvPatchScalarField
{
    // Private Data

        //- Name of temperature field
        word TName_;

        //- External radiative flux
        scalar qRadExt_;

        //- External radiative flux direction
        vector qRadExtDir_;


public:

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


    // Constructors

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

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

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

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

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

        //- Construct as copy setting internal field reference
        greyDiffusiveRadiationMixedFvPatchScalarField
        (
            const greyDiffusiveRadiationMixedFvPatchScalarField&,
            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 greyDiffusiveRadiationMixedFvPatchScalarField(*this, iF)
            );
        }


    // Member Functions

        // Access

            //- Return the temperature field name
            const word& TName() const noexcept
            {
                return TName_;
            }

            //- Return reference to the temperature field name to allow
            //- adjustment
            word& TName() noexcept
            {
                return TName_;
            }


        // Evaluation

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


        // I-O

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


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

} // End namespace Foam
}

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

#endif

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