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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2018 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::DICPreconditioner
Description
Simplified diagonal-based incomplete Cholesky preconditioner for symmetric
matrices (symmetric equivalent of DILU). The reciprocal of the
preconditioned diagonal is calculated and stored.
SourceFiles
DICPreconditioner.C
\*---------------------------------------------------------------------------*/
#ifndef DICPreconditioner_H
#define DICPreconditioner_H
#include "lduMatrix.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
/*---------------------------------------------------------------------------*\
Class DICPreconditioner Declaration
\*---------------------------------------------------------------------------*/
class DICPreconditioner
:
public lduMatrix::preconditioner
{
// Private data
//- The reciprocal preconditioned diagonal
scalarField rD_;
public:
//- Runtime type information
TypeName("DIC");
// Constructors
//- Construct from matrix components and preconditioner solver controls
DICPreconditioner
(
const lduMatrix::solver&,
const dictionary& solverControlsUnused
);
//- Destructor
virtual ~DICPreconditioner()
{}
// Member Functions
//- Calculate the reciprocal of the preconditioned diagonal
static void calcReciprocalD(scalarField& rD, const lduMatrix& matrix);
//- Return wA the preconditioned form of residual rA
virtual void precondition
(
scalarField& wA,
const scalarField& rA,
const direction cmpt=0
) const;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //