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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2025 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
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.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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::fv::heatTransferCoefficientModels::variable
Description
Variable heat transfer model depending on local values. The Nusselt number
is calculated as:
\f[
Nu = a*Re^b*Pr^c
\f]
And the heat transfer coefficient is calculated as:
\f[
htc = Nu*\kappa/L
\f]
Where:
\vartable
\kappa | Conductivity
L | Length scale
\endvartable
Usage
Example usage:
\verbatim
{
heatTransferCoefficientModel variable;
a 1;
b 2;
c 3;
Pr 0.7;
L 1e-3;
}
\endverbatim
\*---------------------------------------------------------------------------*/
#ifndef variable_heatTransferCoefficientModel_H
#define variable_heatTransferCoefficientModel_H
#include "heatTransferCoefficientModel.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace fv
{
namespace heatTransferCoefficientModels
{
/*---------------------------------------------------------------------------*\
Class variable Declaration
\*---------------------------------------------------------------------------*/
class variable
:
public heatTransferCoefficientModel
{
// Private Data
//- Name of neighbour velocity field; default = U
word UName_;
//- Model constant
scalar a_;
//- Model constant
scalar b_;
//- Model constant
scalar c_;
//- Length scale
dimensionedScalar L_;
//- Fluid Prandtl number
dimensionedScalar Pr_;
//- Heat transfer coefficient [W/m^2/K]
volScalarField htc_;
// Private Member Functions
//- Non-virtual read
void readCoeffs(const dictionary& dict);
public:
//- Runtime type information
TypeName("variable");
// Constructors
//- Construct from dictionary and mesh
variable(const dictionary& dict, const fvMesh& mesh);
//- Construct from dictionary and model
variable(const dictionary& dict, const interRegionModel& model);
//- Destructor
virtual ~variable();
// Member Functions
//- Get the heat transfer coefficient
virtual tmp<volScalarField> htc() const
{
return htc_;
}
//- Correct the heat transfer coefficient
virtual void correct();
//- Read dictionary
virtual bool read(const dictionary& dict);
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace heatTransferCoefficientModels
} // End namespace fv
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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