/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2016 OpenFOAM Foundation
\\/ M anipulation |
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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
(at your option) any later version.
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for more details.
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Class
Foam::externalWallHeatFluxTemperatureFvPatchScalarField
Group
grpThermoBoundaryConditions grpWallBoundaryConditions
Description
This boundary condition supplies a heat flux condition for temperature
on an external wall. Optional thin thermal layer resistances can be
specified through thicknessLayers and kappaLayers entries for the
fixed heat transfer coefficient mode.
The condition can operate in two modes:
- fixed heat transfer coefficient: supply h and Ta
- fixed heat flux: supply q
where:
\vartable
h | heat transfer coefficient [W/m^2/K]
Ta | ambient temperature [K]
q | heat flux [W/m^2]
\endvartable
The thermal conductivity, \c kappa, can either be retrieved from the
mesh database using the \c lookup option, or from a \c solidThermo
thermophysical package.
\heading Patch usage
\table
Property | Description | Required | Default value
kappa | thermal conductivity option | yes |
q | heat flux [W/m^2] | yes* |
Ta | ambient temperature [K] | yes* |
h | heat transfer coefficient [W/m^2/K] | yes*|
thicknessLayers | list of thicknesses per layer [m] | yes |
kappaLayers | list of thermal conductivites per layer [W/m/K] | yes |
kappaName | name of thermal conductivity field | yes |
Qr | name of the radiative field | no | no
relaxation | relaxation factor for radiative field | no | 1
\endtable
Example of the boundary condition specification:
\verbatim
myPatch
{
type externalWallHeatFluxTemperature;
kappa fluidThermo;
q uniform 1000;
Ta uniform 300.0;
h uniform 10.0;
thicknessLayers (0.1 0.2 0.3 0.4);
kappaLayers (1 2 3 4);
value uniform 300.0;
kappaName none;
Qr none;
relaxation 1;
}
\endverbatim
Note:
\li Only supply \c h and \c Ta, or \c q in the dictionary (see above)
\li \c kappa and \c kappaName are inherited from temperatureCoupledBase.
SeeAlso
Foam::temperatureCoupledBase
SourceFiles
externalWallHeatFluxTemperatureFvPatchScalarField.C
\*---------------------------------------------------------------------------*/
#ifndef solidWallHeatFluxTemperatureFvPatchScalarField_H
#define solidWallHeatFluxTemperatureFvPatchScalarField_H
#include "mixedFvPatchFields.H"
#include "temperatureCoupledBase.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
/*---------------------------------------------------------------------------*\
Class externalWallHeatFluxTemperatureFvPatchScalarField Declaration
\*---------------------------------------------------------------------------*/
class externalWallHeatFluxTemperatureFvPatchScalarField
:
public mixedFvPatchScalarField,
public temperatureCoupledBase
{
public:
// Public data
//- Operation mode enumeration
enum operationMode
{
fixedHeatFlux,
fixedHeatTransferCoeff,
unknown
};
static const NamedEnum operationModeNames;
private:
// Private data
//- Operation mode
operationMode mode_;
//- Heat flux / [W/m2]
scalarField q_;
//- Heat transfer coefficient / [W/m2K]
scalarField h_;
//- Ambient temperature / [K]
scalarField Ta_;
//- Chache Qr for relaxation
scalarField QrPrevious_;
//- Relaxation for Qr
scalar QrRelaxation_;
//- Name of the radiative heat flux
const word QrName_;
//- Thickness of layers
scalarList thicknessLayers_;
//- Conductivity of layers
scalarList kappaLayers_;
public:
//- Runtime type information
TypeName("externalWallHeatFluxTemperature");
// Constructors
//- Construct from patch and internal field
externalWallHeatFluxTemperatureFvPatchScalarField
(
const fvPatch&,
const DimensionedField&
);
//- Construct from patch, internal field and dictionary
externalWallHeatFluxTemperatureFvPatchScalarField
(
const fvPatch&,
const DimensionedField&,
const dictionary&
);
//- Construct by mapping given
// externalWallHeatFluxTemperatureFvPatchScalarField
// onto a new patch
externalWallHeatFluxTemperatureFvPatchScalarField
(
const externalWallHeatFluxTemperatureFvPatchScalarField&,
const fvPatch&,
const DimensionedField&,
const fvPatchFieldMapper&
);
//- Construct as copy
externalWallHeatFluxTemperatureFvPatchScalarField
(
const externalWallHeatFluxTemperatureFvPatchScalarField&
);
//- Construct and return a clone
virtual tmp clone() const
{
return tmp
(
new externalWallHeatFluxTemperatureFvPatchScalarField(*this)
);
}
//- Construct as copy setting internal field reference
externalWallHeatFluxTemperatureFvPatchScalarField
(
const externalWallHeatFluxTemperatureFvPatchScalarField&,
const DimensionedField&
);
//- Construct and return a clone setting internal field reference
virtual tmp clone
(
const DimensionedField& iF
) const
{
return tmp
(
new externalWallHeatFluxTemperatureFvPatchScalarField(*this, iF)
);
}
// Member functions
// Mapping functions
//- Map (and resize as needed) from self given a mapping object
virtual void autoMap
(
const fvPatchFieldMapper&
);
//- Reverse map the given fvPatchField onto this fvPatchField
virtual void rmap
(
const fvPatchScalarField&,
const labelList&
);
// Evaluation functions
//- Update the coefficients associated with the patch field
virtual void updateCoeffs();
// I-O
//- Write
void write(Ostream&) const;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //