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src
OpenFOAM
matrices
lduMatrix
preconditioners
GAMGPreconditioner
GAMGPreconditioner.C
Go to the documentation of this file.
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include <
OpenFOAM/GAMGPreconditioner.H
>
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace
Foam
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{
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defineTypeNameAndDebug
(GAMGPreconditioner, 0);
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lduMatrix::preconditioner::addsymMatrixConstructorToTable
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<
GAMGPreconditioner
>
addGAMGPreconditionerSymMatrixConstructorToTable_
;
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lduMatrix::preconditioner::addasymMatrixConstructorToTable
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<
GAMGPreconditioner
>
addGAMGPreconditionerAsymMatrixConstructorToTable_
;
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::GAMGPreconditioner::GAMGPreconditioner
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(
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const
lduMatrix::solver
& sol,
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const
dictionary
& solverControls
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)
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:
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GAMGSolver
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(
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sol.
fieldName
(),
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sol.
matrix
(),
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sol.
interfaceBouCoeffs
(),
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sol.
interfaceIntCoeffs
(),
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sol.
interfaces
(),
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solverControls
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),
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lduMatrix::preconditioner
(sol),
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nVcycles_(2)
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{
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readControls();
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}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::GAMGPreconditioner::~GAMGPreconditioner
()
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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void
Foam::GAMGPreconditioner::readControls
()
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{
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GAMGSolver::readControls();
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nVcycles_ = controlDict_.lookupOrDefault<label>(
"nVcycles"
, 2);
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}
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void
Foam::GAMGPreconditioner::precondition
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(
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scalarField
& wA,
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const
scalarField
& rA,
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const
direction
cmpt
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)
const
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{
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wA = 0.0;
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scalarField
AwA(wA.
size
());
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scalarField
finestCorrection(wA.
size
());
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scalarField
finestResidual(rA);
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// Create coarse grid correction fields
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PtrList<scalarField>
coarseCorrFields;
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// Create coarse grid sources
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PtrList<scalarField>
coarseSources;
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// Create the smoothers for all levels
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PtrList<lduMatrix::smoother>
smoothers;
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// Initialise the above data structures
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initVcycle(coarseCorrFields, coarseSources, smoothers);
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for
(label cycle=0; cycle<nVcycles_; cycle++)
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{
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Vcycle
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(
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smoothers,
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wA,
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rA,
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AwA,
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finestCorrection,
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finestResidual,
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coarseCorrFields,
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coarseSources,
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cmpt
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);
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if
(cycle < nVcycles_-1)
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{
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// Calculate finest level residual field
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matrix_.Amul(AwA, wA, interfaceBouCoeffs_, interfaces_, cmpt);
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finestResidual = rA;
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finestResidual -= AwA;
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}
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}
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}
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// ************************ vim: set sw=4 sts=4 et: ************************ //