ReynoldsAnalogy.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2017-2019 OpenCFD Ltd.
-------------------------------------------------------------------------------
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
    (at your option) any later version.
 
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::heatTransferCoeffModels::ReynoldsAnalogy
 
Description
    Heat transfer coefficient calculation based on Reynolds Analogy
 
    The heat transfer coefficient is derived from the skin friction
    coefficient:
 
    \f[
        C_f = \frac{\tau_w}{0.5 \rho_\infty |U|^2}
    \f]
 
    as:
 
    \f[
        h = 0.5 \rho_\infty C_{p,\infty} |U_{\infty}| C_f
    \f]
 
Usage
    Example of function object specification:
    \verbatim
        type            heatTransferCoeff;
        libs            ("libfieldFunctionObjects.so");
        ...
        htcModel        ReynoldsAnalogy;
        UInf            (20 0 0);
        Cp              CpInf;
        CpInf           1005;
        ...
    \endverbatim
 
    Where the entries comprise:
    \table
        Property     | Description             | Required    | Default value
        type         | type name: heatTransferCoeff | yes    |
        htcModel     | selected htc model      | yes         |
        UInf         | reference velocity      | yes |
        Cp           | specific heat capacity field name | no |
        rho          | density field name      | no |
    \endtable
 
    Note:
    - to use a reference \c Cp, set \c Cp to \c CpInf
    - to use a reference \c rho, set \c rho to \c rhoInf
 
SourceFiles
    ReynoldsAnalogy.C
 
SeeAlso
    Foam::heatTransferCoeffModel
 
\*---------------------------------------------------------------------------*/
 
#ifndef heatTransferCoeffModels_ReynoldsAnalogy_H
#define heatTransferCoeffModels_ReynoldsAnalogy_H
 
#include "heatTransferCoeffModel.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace heatTransferCoeffModels
{
 
/*---------------------------------------------------------------------------*\
                   Class ReynoldsAnalogy Declaration
\*---------------------------------------------------------------------------*/
 
class ReynoldsAnalogy
:
    public heatTransferCoeffModel
{
    // Private Member Functions
 
        //- No copy construct
        ReynoldsAnalogy(const ReynoldsAnalogy&) = delete;
 
        //- No copy assignment
        void operator=(const ReynoldsAnalogy&) = delete;
 
 
protected:
 
    // Protected data
 
        //- Name of velocity field
        word UName_;
 
        //- Reference velocity
        vector URef_;
 
        //- Name of density field
        word rhoName_;
 
        //- Reference density
        scalar rhoRef_;
 
        //- Name of specific heat capacity field
        word CpName_;
 
        //- Reference specific heat capacity
        scalar CpRef_;
 
 
    // Protected Member Functions
 
        virtual tmp<Field<scalar>> rho(const label patchi) const;
 
        virtual tmp<Field<scalar>> Cp(const label patchi) const;
 
        virtual tmp<volSymmTensorField> devReff() const;
 
        tmp<FieldField<Field, scalar>> Cf() const;
 
        //- Set the heat transfer coefficient
        virtual void htc(volScalarField& htc);
 
 
public:
 
    //- Runtime type information
    TypeName("ReynoldsAnalogy");
 
 
    // Constructors
 
        //- Construct from components
        ReynoldsAnalogy
        (
            const dictionary& dict,
            const fvMesh& mesh,
            const word& TName
        );
 
 
    //- Destructor
    virtual ~ReynoldsAnalogy() = default;
 
 
    // Member Functions
 
        //- Read from dictionary
        virtual bool read(const dictionary& dict);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace heatTransferCoeffModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //