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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2019-2026 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
(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::volumeBlockage
Description
This fvModel adds transport terms into the equations to account for the
presence of a constant volume fraction. The volume fraction is read from
constant/alpha.\<volumePhase\>, where \<volumePhase\> is given as a
parameter to the fvModel. Both advective and diffusive terms are added, and
the resulting solution is time-accurate. The flux and velocity are treated
as superficial.
This can be used to represent the effect of porous media that are caused
purely by the reduction in volume of the fluid phase; i.e., additional
volumeBlockage, and changes to transport and diffusion rates. It does not
represent losses or transfers with the porous media. That requires separate
sub-modelling.
Usage
\table
Property | Description | Req'd? | Default
phi | Name of the flux field | no | phi
rho | Name of the density field | no | rho
U | Name of the velocity field | no | U
volumePhase | Name of the phase associated with the volume fraction \\
| yes |
\endtable
Example specification:
\verbatim
volumeBlockage1
{
type volumeBlockage;
phi phi;
rho rho;
U U;
volumePhase solid;
}
\endverbatim
SourceFiles
volumeBlockage.C
\*---------------------------------------------------------------------------*/
#ifndef volumeBlockage_H
#define volumeBlockage_H
#include "fvModel.H"
#include "surfaceFields.H"
#include "volFields.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace fv
{
/*---------------------------------------------------------------------------*\
Class volumeBlockage Declaration
\*---------------------------------------------------------------------------*/
class volumeBlockage
:
public fvModel
{
// Private Data
//- The name of the flux field
word phiName_;
//- The name of the density field
word rhoName_;
//- The name of the velocity field
word UName_;
//- The name of the volume fraction phase
word volumePhaseName_;
// Private Member Functions
//- Non-virtual read
void readCoeffs(const dictionary& dict);
//- Get the volume fraction field
const volScalarField& volumeAlpha() const;
//- Get the diffusivity for a given field
tmp<volScalarField> D(const word& fieldName) const;
// Sources
//- Add source terms to an equation
template<class Type, class AlphaFieldType>
void addGeneralSupType
(
const AlphaFieldType& alpha,
fvMatrix<Type>&
) const;
//- Add a source term to an equation
template<class Type, class AlphaFieldType>
void addAlphaSupType
(
const AlphaFieldType& alpha,
const VolField<Type>& field,
fvMatrix<Type>& eqn
) const;
//- Add a source term to a scalar equation
template<class AlphaFieldType>
void addAlphaSupType
(
const AlphaFieldType& alpha,
const volScalarField& field,
fvMatrix<scalar>& eqn
) const;
//- Add a source term to a vector equation
template<class AlphaFieldType>
void addAlphaSupType
(
const AlphaFieldType& alpha,
const volVectorField& field,
fvMatrix<vector>& eqn
) const;
//- Add a source term to an equation
template<class Type>
void addSupType
(
const VolField<Type>& field,
fvMatrix<Type>& eqn
) const;
//- Add a source term to a compressible equation
template<class Type>
void addSupType
(
const volScalarField& rho,
const VolField<Type>& field,
fvMatrix<Type>& eqn
) const;
//- Add a source term to a phase equation
template<class Type>
void addSupType
(
const volScalarField& alpha,
const volScalarField& rho,
const VolField<Type>& field,
fvMatrix<Type>& eqn
) const;
public:
//- Runtime type information
TypeName("volumeBlockage");
// Constructors
//- Construct from components
volumeBlockage
(
const word& name,
const word& modelType,
const fvMesh& mesh,
const dictionary& dict
);
//- Disallow default bitwise copy construction
volumeBlockage(const volumeBlockage&) = delete;
//- Destructor
virtual ~volumeBlockage();
// Member Functions
// Checks
//- Return true if the fvModel adds a source term to the given
// field's transport equation
virtual bool addsSupToField(const word& fieldName) const;
//- Return the list of fields for which the fvModel adds source term
// to the transport equation
virtual wordList addSupFields() const;
// Sources
//- Add a source term to an equation
FOR_ALL_FIELD_TYPES(DEFINE_FV_MODEL_ADD_FIELD_SUP)
//- Add a source term to a compressible equation
FOR_ALL_FIELD_TYPES(DEFINE_FV_MODEL_ADD_RHO_FIELD_SUP)
//- Add a source term to a phase equation
FOR_ALL_FIELD_TYPES(DEFINE_FV_MODEL_ADD_ALPHA_RHO_FIELD_SUP)
// Mesh changes
//- Update for mesh motion
virtual bool movePoints();
//- Update topology using the given map
virtual void topoChange(const polyTopoChangeMap&);
//- Update from another mesh using the given map
virtual void mapMesh(const polyMeshMap&);
//- Redistribute or update using the given distribution map
virtual void distribute(const polyDistributionMap&);
// IO
//- Read dictionary
virtual bool read(const dictionary& dict);
// Member Operators
//- Disallow default bitwise assignment
void operator=(const volumeBlockage&) = delete;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace fv
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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