1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 2004-2010 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
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13 the Free Software Foundation, either version 3 of the License, or
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25 Foam::DICPreconditioner
28 Simplified diagonal-based incomplete Cholesky preconditioner for symmetric
29 matrices (symmetric equivalent of DILU). The reciprocal of the
30 preconditioned diagonal is calculated and stored.
35 \*---------------------------------------------------------------------------*/
37 #ifndef DICPreconditioner_H
38 #define DICPreconditioner_H
40 #include "lduMatrix.H"
42 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
47 /*---------------------------------------------------------------------------*\
48 Class DICPreconditioner Declaration
49 \*---------------------------------------------------------------------------*/
51 class DICPreconditioner
53 public lduMatrix::preconditioner
57 //- The reciprocal preconditioned diagonal
63 //- Runtime type information
69 //- Construct from matrix components and preconditioner solver controls
72 const lduMatrix::solver&,
73 const dictionary& solverControlsUnused
78 virtual ~DICPreconditioner()
84 //- Calculate the reciprocal of the preconditioned diagonal
85 static void calcReciprocalD(scalarField& rD, const lduMatrix& matrix);
87 //- Return wA the preconditioned form of residual rA
88 virtual void precondition
91 const scalarField& rA,
92 const direction cmpt=0
97 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
99 } // End namespace Foam
101 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
105 // ************************************************************************* //