variableHeatTransfer.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2011-2015 OpenFOAM Foundation
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License
    This file is part of OpenFOAM.
 
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Class
    Foam::fv::variableHeatTransfer
 
Group
    grpFvOptionsSources
 
Description
    Variable heat transfer model depending on local values. The area of contact
    between regions (area) must be provided. The Nu number is calculated as:
 
        Nu = a*pow(Re, b)*pow(Pr, c)
 
    and the heat transfer coefficient as:
 
        htc = Nu*K/ds
 
    where:
        K is the heat conduction
        ds is the strut diameter
 
\*---------------------------------------------------------------------------*/
 
#ifndef variableHeatTransfer_H
#define variableHeatTransfer_H
 
#include "interRegionHeatTransferModel.H"
#include "autoPtr.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace fv
{
 
/*---------------------------------------------------------------------------*\
                    Class variableHeatTransfer Declaration
\*---------------------------------------------------------------------------*/
 
class variableHeatTransfer
:
    public interRegionHeatTransferModel
{
private:
 
    // Private data
 
        //- Name of neighbour velocity field; default = U
        word UNbrName_;
 
        //- Model constants
        scalar a_;
        scalar b_;
        scalar c_;
 
        //- Strut diameter
        scalar ds_;
 
        //- Fluid Prandtl number
        scalar Pr_;
 
        //- Area per unit volume of heat exchanger
        autoPtr<volScalarField> AoV_;
 
 
public:
 
    //- Runtime type information
    TypeName("variableHeatTransfer");
 
 
    // Constructors
 
        //- Construct from dictionary
        variableHeatTransfer
        (
            const word& name,
            const word& modelType,
            const dictionary& dict,
            const fvMesh& mesh
        );
 
 
    //- Destructor
    virtual ~variableHeatTransfer() = default;
 
 
    // Public Functions
 
        //- Calculate the heat transfer coefficient
        virtual void calculateHtc();
 
        //- Read dictionary
        virtual bool read(const dictionary& dict);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace fv
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //