viewFactorHottel.H

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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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Class
    Foam::VF::viewFactorHottel
 
Description
    Computes view factors according to Hottel's crossed strings method.
 
    Reference:
    \verbatim
        Hottel, H. C., & Saforim, A. F. (1967).
        Radiative transfer.
        McGraw-Hill Book Company, New York.
    \endverbatim
 
Usage
    Minimal example in \c <constant>/viewFactorsDict:
    \verbatim
    // Inherited entries
    ...
    \endverbatim
 
    The inherited entries are elaborated in:
    - \link viewFactorModel.H \endlink
 
Note
    Only applicable to 2D cases
 
SourceFiles
    viewFactorModel.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_vf_viewFactorHottel_H
#define Foam_vf_viewFactorHottel_H
 
#include "viewFactorModel.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
namespace VF
{
 
/*---------------------------------------------------------------------------*\
                       Class viewFactorHottel Declaration
\*---------------------------------------------------------------------------*/
 
class viewFactorHottel
:
    public viewFactorModel
{
    // Private Data
 
        //- Mesh empty direction
        vector emptyDir_;
 
        //- Mesh 2D width
        scalar w_;
 
 
protected:
 
    // Protected Member Functions
 
        //- Calculate view factor using the double-area integral
        static scalar calculateFij
        (
            const point& p0,
            const point& p1,
            const point& p2,
            const point& p3
        );
 
        //- Calculate
        virtual scalarListList calculate
        (
            const labelListList& visibleFaceFaces,
            const pointField& compactCf,
            const vectorField& compactSf,
            const UList<List<vector>>& compactFineSf,
            const UList<List<point>>& compactFineCf,
            const UList<List<point>>& compactPoints,
            const UList<label>& compactPatchId
        ) const;
 
 
public:
 
    //- Runtime type information
    TypeName("viewFactorHottel");
 
    //- Constructor
    viewFactorHottel(const fvMesh& mesh, const dictionary& dict);
 
    //- Destructor
    virtual ~viewFactorHottel() = default;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace VF
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //