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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2023-2026 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::zeroDimensionalFixedPressureConstraint
Description
Zero-dimensional fixed pressure constraint. Should be used in conjunction
with the zeroDimensionalFixedPressureModel.
This constraint and model facilitates specification of a constant or
time-varying pressure. It adds mass source terms proportional to the error
that remains when the pressure equation is evaluated at the desired
pressure. Iteration may be necessary to converge the constraint in the case
of non-linear equations of state.
Properties are added or removed with their current value. The model
therefore represents a uniform expansion or contraction in infinite space.
Usage
Example usage:
\verbatim
{
type zeroDimensionalFixedPressure;
// Name of the pressure field, default = p
//p p;
// Name of the density field, default = rho
//rho rho;
// Pressure value
pressure 1e5;
}
\endverbatim
\*---------------------------------------------------------------------------*/
#ifndef zeroDimensionalFixedPressureConstraint_H
#define zeroDimensionalFixedPressureConstraint_H
#include "fvConstraint.H"
#include "Function1.H"
#include "volFields.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace fv
{
class zeroDimensionalFixedPressureModel;
/*---------------------------------------------------------------------------*\
Class zeroDimensionalFixedPressureConstraint Declaration
\*---------------------------------------------------------------------------*/
class zeroDimensionalFixedPressureConstraint
:
public fvConstraint
{
// Private data
//- Pressure field name, default = p
word pName_;
//- Density field name, default = rho
word rhoName_;
//- The pressure value
autoPtr<Function1<scalar>> p_;
//- The mass or volume source
mutable autoPtr<volInternalScalarField> sourcePtr_;
// Private Member Functions
//- Access the corresponding model
const zeroDimensionalFixedPressureModel& model() const;
//- Get the mass source
template<class AlphaFieldType>
tmp<volInternalScalarField> massSource
(
const AlphaFieldType& alpha,
const volInternalScalarField& rho
) const;
//- Non-virtual read
void readCoeffs(const dictionary& dict);
public:
//- Runtime type information
TypeName("zeroDimensionalFixedPressure");
// Constructors
//- Construct from dictionary
zeroDimensionalFixedPressureConstraint
(
const word& name,
const word& modelType,
const fvMesh& mesh,
const dictionary& dict
);
//- Destructor
virtual ~zeroDimensionalFixedPressureConstraint();
// Member Functions
// Access
//- Pressure field name
inline const word& pName() const
{
return pName_;
}
//- Density field name
inline const word& rhoName() const
{
return rhoName_;
}
// Checks
//- Return the list of fields constrained by the fvConstraint
virtual wordList constrainedFields() const;
// Constraints
//- Return the mass or volume source for the pressure equation
tmp<volInternalScalarField> pEqnSource
(
const volScalarField& rho,
fvMatrix<scalar>& pEqn
) const;
//- Return the mass source
tmp<volInternalScalarField> massSource
(
const volInternalScalarField& rho
) const;
//- Return the mass source for a given phase
tmp<volInternalScalarField> massSource
(
const volInternalScalarField& alpha,
const volInternalScalarField& rho
) const;
//- Apply the constraint to the pressure equation
virtual bool constrain
(
fvMatrix<scalar>& pEqn,
const word& fieldName
) const;
// 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);
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace fv
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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