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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2015-2026 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::patchDistMethods::Poisson
Description
Calculation of approximate distance to nearest patch for all cells and
boundary by solving Poisson's equation.
References:
\verbatim
D.B. Spalding,
"Calculation of turbulent heat transfer in cluttered spaces",
Proc. 10th Int. Heat Transfer Conference, Brighton, UK, (1994).
E. Fares and W. Schroder,
"Differential Equation for Approximate Wall Distance",
Int.J.Numer.Meth., 39:743-762, (2002).
P.G. Tucker,
"Differential equation based wall distance computation for DES and
RANS",
J.Comp.Phys., Vol. 190, Issue 1, 1 st September, pp. 229-248 (2003)
\endverbatim
Example of the wallDist specification in fvSchemes:
\verbatim
laplacianSchemes
{
.
.
laplacian(yPsi) Gauss linear corrected;
.
.
}
wallDist
{
method Poisson;
// Optional entry enabling the calculation
// of the normal-to-wall field
nRequired false;
}
\endverbatim
Also the solver specification for yPsi is required in fvSolution, e.g.
for simple cases:
\verbatim
yPsi
{
solver PCG;
preconditioner DIC;
tolerance 1e-5;
relTol 0;
}
or for more complex cases:
yPsi
{
solver GAMG;
smoother GaussSeidel;
tolerance 1e-5;
relTol 0;
}
\endverbatim
See also
Foam::patchDistMethod::meshWave
Foam::wallDist
SourceFiles
PoissonPatchDistMethod.C
\*---------------------------------------------------------------------------*/
#ifndef PoissonPatchDistMethod_H
#define PoissonPatchDistMethod_H
#include "patchDistMethod.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace patchDistMethods
{
/*---------------------------------------------------------------------------*\
Class Poisson Declaration
\*---------------------------------------------------------------------------*/
class Poisson
:
public patchDistMethod
{
// Private Data
//- Cache yPsi for moving meshes
tmp<volScalarField> tyPsi_;
public:
//- Runtime type information
TypeName("Poisson");
// Constructors
//- Construct from coefficients dictionary, mesh
// and fixed-value patch set
Poisson
(
const dictionary& dict,
const fvMesh& mesh,
const labelHashSet& patchIDs
);
//- Construct from mesh and fixed-value patch set
Poisson
(
const fvMesh& mesh,
const labelHashSet& patchIDs
);
//- Disallow default bitwise copy construction
Poisson(const Poisson&) = delete;
// Member Functions
//- Correct the given distance-to-patch field
virtual bool correct(volScalarField& y);
//- Correct the given distance-to-patch and normal-to-patch fields
virtual bool correct(volScalarField& y, volVectorField& n);
// Member Operators
//- Disallow default bitwise assignment
void operator=(const Poisson&) = delete;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace patchDistMethods
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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