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Chris Greenshields authoredd96a221b
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2015-2017 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::compressible::alphatWallBoilingWallFunctionFvPatchScalarField
Group
grpCmpWallFunctions
Description
A thermal wall function for simulation of subcooled nucleate wall boiling
with runtime selctable submodels for:
- wall heat flux partitioning model
- nucleation site density
- bubble departure frequency
- bubble departure diameter
Implements a version of the well-known RPI wall boiling model
(Kurul & Podowski, 1991). The model implementation is similar to the model
described by Peltola & Pättikangas (2012) but has been extended with the
wall heat flux partitioning models.
References:
\verbatim
"On the modeling of multidimensional effects in boiling channels"
Kurul, N., Podowski, M.Z.,
ANS Proceedings, National Heat Transfer Conference,
Minneapolis, Minnesota, USA, July 28-31, 1991,
ISBN: 0-89448-162-1, pp. 30-40
\endverbatim
\verbatim
"Development and validation of a boiling model for OpenFOAM
multiphase solver"
Peltola, J., Pättikangas, T.J.H.,
CFD4NRS-4 Conference Proceedings, paper 59,
Daejeon, Korea, September 10-12 2012
\endverbatim
Usage
\table
Property | Description | Required | Default value
phaseType | 'vapor' or 'liquid' | yes |
relax |wall boiling model relaxation| yes |
Prt | inherited from alphatPhaseChangeJayatillekeWallFunction
Cmu | inherited from alphatPhaseChangeJayatillekeWallFunction
kappa | inherited from alphatPhaseChangeJayatillekeWallFunction
E | inherited from alphatPhaseChangeJayatillekeWallFunction
dmdt | phase change mass flux | yes |
value | initial alphat value | yes |
if phaseType 'vapor':
partitioningModel| | yes |
if phaseType 'liquid':
partitioningModel| | yes |
nucleationSiteModel| | yes |
departureDiamModel| | yes |
departureFreqModel| | yes |
\endtable
NOTE: Runtime selectabale submodels may require model specific entries
Example usage:
\verbatim
hotWall
{
type compressible::alphatWallBoiling2WallFunction;
phaseType liquid;
Prt 0.85;
Cmu 0.09;
kappa 0.41;
E 9.8;
relax 0.001;
dmdt uniform 0;
partitioningModel
{
type Lavieville;
alphaCrit 0.2;
}
nucleationSiteModel
{
type LemmertChawla;
}
departureDiamModel
{
type TolubinskiKostanchuk;
}
departureFreqModel
{
type Cole;
}
value uniform 0.01;
\endverbatim
See also
Foam::alphatPhaseChangeJayatillekeWallFunctionFvPatchField
SourceFiles
alphatWallBoilingWallFunctionFvPatchScalarField.C
\*---------------------------------------------------------------------------*/
#ifndef compressiblealphatWallBoilingWallFunctionFvPatchScalarField_H
#define compressiblealphatWallBoilingWallFunctionFvPatchScalarField_H
#include "alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField.H"
#include "partitioningModel.H"
#include "nucleationSiteModel.H"
#include "departureDiameterModel.H"
#include "departureFrequencyModel.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace compressible
{
/*---------------------------------------------------------------------------*\
Class alphatWallBoilingWallFunctionFvPatchScalarField Declaration
\*---------------------------------------------------------------------------*/
class alphatWallBoilingWallFunctionFvPatchScalarField
:
public alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField
{
public:
// Data types
//- Enumeration listing the possible operational modes
enum phaseType
{
vaporPhase,
liquidPhase
};
private:
// Private data
//- Heat source type names
static const NamedEnum<phaseType, 2> phaseTypeNames_;
//- Heat source type
phaseType phaseType_;
//- dmdt relaxationFactor
scalar relax_;
//- Patch face area by cell volume
scalarField AbyV_;
//- Convective turbulent thermal diffusivity
scalarField alphatConv_;
//- Departure diameter field
scalarField dDep_;
//- Quenching surface heat flux
scalarField qq_;
//- Run-time selected heat flux partitioning model
autoPtr<wallBoilingModels::partitioningModel>
partitioningModel_;
//- Run-time selected nucleation site density model
autoPtr<wallBoilingModels::nucleationSiteModel>
nucleationSiteModel_;
//- Run-time selected bubble departure diameter model
autoPtr<wallBoilingModels::departureDiameterModel>
departureDiamModel_;
//- Run-time selected bubble departure frequency model
autoPtr<wallBoilingModels::departureFrequencyModel>
departureFreqModel_;
public:
//- Runtime type information
TypeName("compressible::alphatWallBoilingWallFunction");
// Constructors
//- Construct from patch and internal field
alphatWallBoilingWallFunctionFvPatchScalarField
(
const fvPatch&,
const DimensionedField<scalar, volMesh>&
);
//- Construct from patch, internal field and dictionary
alphatWallBoilingWallFunctionFvPatchScalarField
(
const fvPatch&,
const DimensionedField<scalar, volMesh>&,
const dictionary&
);
//- Construct by mapping given
// alphatWallBoilingWallFunctionFvPatchScalarField
// onto a new patch
alphatWallBoilingWallFunctionFvPatchScalarField
(
const alphatWallBoilingWallFunctionFvPatchScalarField&,
const fvPatch&,
const DimensionedField<scalar, volMesh>&,
const fvPatchFieldMapper&
);
//- Construct as copy
alphatWallBoilingWallFunctionFvPatchScalarField
(
const alphatWallBoilingWallFunctionFvPatchScalarField&
);
//- Construct and return a clone
virtual tmp<fvPatchScalarField> clone() const
{
return tmp<fvPatchScalarField>
(
new alphatWallBoilingWallFunctionFvPatchScalarField(*this)
);
}
//- Construct as copy setting internal field reference
alphatWallBoilingWallFunctionFvPatchScalarField
(
const alphatWallBoilingWallFunctionFvPatchScalarField&,
const DimensionedField<scalar, volMesh>&
);
//- Construct and return a clone setting internal field reference
virtual tmp<fvPatchScalarField> clone
(
const DimensionedField<scalar, volMesh>& iF
) const
{
return tmp<fvPatchScalarField>
(
new alphatWallBoilingWallFunctionFvPatchScalarField(*this, iF)
);
}
// Member functions
//- Return the departure diameter field
const scalarField& dDeparture() const
{
return dDep_;
}
//- Return the quenching surface heat flux [W/m2]
const scalarField& qq() const
{
return qq_;
}
//- Return the evaporation surface heat flux [W/m2]
tmp<scalarField> qe() const
{
return mDotL_/AbyV_;
}
// Evaluation functions
//- Update the coefficients associated with the patch field
virtual void updateCoeffs();
// I-O
//- Write
virtual void write(Ostream&) const;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace compressible
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //