1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2008 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
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13 Free Software Foundation; either version 2 of the License, or (at your
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21 You should have received a copy of the GNU General Public License
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23 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26 Foam::DICPreconditioner
29 Simplified diagonal-based incomplete Cholesky preconditioner for symmetric
30 matrices (symmetric equivalent of DILU). The reciprocal of the
31 preconditioned diagonal is calculated and stored.
36 \*---------------------------------------------------------------------------*/
38 #ifndef DICPreconditioner_H
39 #define DICPreconditioner_H
41 #include "lduMatrix.H"
43 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
48 /*---------------------------------------------------------------------------*\
49 Class DICPreconditioner Declaration
50 \*---------------------------------------------------------------------------*/
52 class DICPreconditioner
54 public lduMatrix::preconditioner
58 //- The reciprocal preconditioned diagonal
64 //- Runtime type information
70 //- Construct from matrix components and preconditioner data stream
73 const lduMatrix::solver& sol,
74 Istream& preconditionerData
80 virtual ~DICPreconditioner()
86 //- Calculate the reciprocal of the preconditioned diagonal
87 static void calcReciprocalD(scalarField& rD, const lduMatrix& matrix);
89 //- Return wA the preconditioned form of residual rA
90 virtual void precondition
93 const scalarField& rA,
94 const direction cmpt=0
99 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
101 } // End namespace Foam
103 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
107 // ************************************************************************* //