OpenFOAM-dev / data /src /ThermophysicalTransportModels /coupledThermophysicalTransportModels /externalTemperature /externalTemperatureFvPatchScalarField.H
| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
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| \\ / A nd | Copyright (C) 2011-2026 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 | |
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| for more details. | |
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| Class | |
| Foam::externalTemperatureFvPatchScalarField | |
| Description | |
| This boundary condition applies a heat flux condition to temperature | |
| on an external wall. Heat flux can be specified in the following ways: | |
| - Fixed power: requires \c Q | |
| - Fixed heat flux: requires \c q | |
| - Fixed heat transfer coefficient: requires \c h and \c Ta | |
| where: | |
| \vartable | |
| Q | Power Function1 of time [W] | |
| q | Heat flux Function1 of time [W/m^2] | |
| h | Heat transfer coefficient DimensionedFieldFunction [W/m^2/K] | |
| Ta | Ambient temperature Function1 of time [K] | |
| \endvartable | |
| Only one of \c Q or \c q may be specified, if \c h and \c Ta are also | |
| specified the corresponding heat-flux is added. | |
| The patch thermal conductivity \c kappa is obtained from the region | |
| thermophysicalTransportModel so that this boundary condition can be applied | |
| directly to either fluid or solid regions. | |
| Usage | |
| \table | |
| Property | Description | Required | Default value | |
| Q | Power [W] | no | | |
| q | Heat flux [W/m^2] | no | | |
| h | Heat transfer coefficient [W/m^2/K] | no | | |
| Ta | Ambient temperature [K] | if h is given | | |
| relaxation | Relaxation for the wall temperature | no | 1 | |
| emissivity | Surface emissivity for radiative flux to ambient | no | 0 | |
| qr | Name of the radiative field | no | none | |
| qrRelaxation | Relaxation factor for radiative field | no | 1 | |
| \endtable | |
| Example of the boundary condition specification: | |
| \verbatim | |
| <patchName> | |
| { | |
| type externalTemperature; | |
| Ta constant 300.0; | |
| h uniform 10.0; | |
| value $internalField; | |
| } | |
| \endverbatim | |
| See also | |
| Foam::mixedFvPatchScalarField | |
| Foam::Function1 | |
| SourceFiles | |
| externalTemperatureFvPatchScalarField.C | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| /*---------------------------------------------------------------------------*\ | |
| Class externalTemperatureFvPatchScalarField Declaration | |
| \*---------------------------------------------------------------------------*/ | |
| class externalTemperatureFvPatchScalarField | |
| : | |
| public mixedFvPatchScalarField | |
| { | |
| // Private Data | |
| // Heat power | |
| //- Do we have a heat power? | |
| bool haveQ_; | |
| //- Heat power [W] | |
| autoPtr<Function1<scalar>> Q_; | |
| // Heat flux | |
| //- Do we have a heat flux? | |
| bool haveq_; | |
| //- Heat flux [W/m^2] | |
| autoPtr<Function1<scalar>> q_; | |
| // Heat transfer coefficient | |
| //- Heat transfer coefficient [W/m^2K] | |
| autoPtr<FunctionalDimensionedField<scalar, fvPatch>> h_; | |
| //- Do we have an emissivity? | |
| const bool haveEmissivity_; | |
| //- Optional surface emissivity for radiative transfer to ambient | |
| scalar emissivity_; | |
| //- Ambient temperature [K] | |
| autoPtr<Function1<scalar>> Ta_; | |
| //- Relaxation factor for the wall temperature (thermal inertia) | |
| scalar relax_; | |
| // Radiation | |
| //- Name of the radiative heat flux | |
| const word qrName_; | |
| //- Relaxation factor for qr | |
| scalar qrRelax_; | |
| //- Cache qr for relaxation | |
| scalarField qrPrevious_; | |
| protected: | |
| // Protected Member Functions | |
| //- Plus-equals op for a tmp field. Will initialise the tmp if empty. | |
| void addEqOp(tmp<scalarField>& tf, const scalar d) const; | |
| //- Plus-equals op for a tmp field. Will initialise the tmp if empty. | |
| void addEqOp(tmp<scalarField>& tf, const tmp<scalarField>& tdf) const; | |
| //- Get the patch kappa, kappa*Tc/delta, kappa/delta, | |
| // reference T, current wall T and also the | |
| // heat-flux/delta obtained from the sum heat-flux provided | |
| virtual void getKappa | |
| ( | |
| scalarField& kappa, | |
| tmp<scalarField>& sumKappaTcByDelta, | |
| tmp<scalarField>& sumKappaByDelta, | |
| tmp<scalarField>& T, | |
| tmp<scalarField>& sumq | |
| ) const; | |
| public: | |
| //- Runtime type information | |
| TypeName("externalTemperature"); | |
| // Constructors | |
| //- Construct from patch, internal field and dictionary | |
| externalTemperatureFvPatchScalarField | |
| ( | |
| const fvPatch&, | |
| const DimensionedField<scalar, fvMesh>&, | |
| const dictionary& | |
| ); | |
| //- Construct by mapping given | |
| // externalTemperatureFvPatchScalarField | |
| // onto a new patch | |
| externalTemperatureFvPatchScalarField | |
| ( | |
| const externalTemperatureFvPatchScalarField&, | |
| const fvPatch&, | |
| const DimensionedField<scalar, fvMesh>&, | |
| const fieldMapper& | |
| ); | |
| //- Disallow copy without setting internal field reference | |
| externalTemperatureFvPatchScalarField | |
| ( | |
| const externalTemperatureFvPatchScalarField& | |
| ) = delete; | |
| //- Copy constructor setting internal field reference | |
| externalTemperatureFvPatchScalarField | |
| ( | |
| const externalTemperatureFvPatchScalarField&, | |
| const DimensionedField<scalar, fvMesh>& | |
| ); | |
| //- Construct and return a clone setting internal field reference | |
| virtual tmp<fvPatchScalarField> clone | |
| ( | |
| const DimensionedField<scalar, fvMesh>& iF | |
| ) const; | |
| //- Destructor | |
| virtual ~externalTemperatureFvPatchScalarField(); | |
| // Member Functions | |
| // Access | |
| //- Disallow manipulation of the boundary values | |
| // The boundary temperature is evaluated only by | |
| // this boundary condition | |
| virtual bool fixesValue() const | |
| { | |
| return true; | |
| } | |
| // Mapping functions | |
| //- Map the given fvPatchField onto this fvPatchField | |
| virtual void map(const fvPatchScalarField&, const fieldMapper&); | |
| //- Reset the fvPatchField to the given fvPatchField | |
| // Used for mesh to mesh mapping | |
| virtual void reset(const fvPatchScalarField&); | |
| // Evaluation functions | |
| //- Update the coefficients associated with the patch field | |
| virtual void updateCoeffs(); | |
| // I-O | |
| //- Write | |
| void write(Ostream&) const; | |
| // Member Operators | |
| //- Inherit assignment | |
| using mixedFvPatchScalarField::operator=; | |
| }; | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |