1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2009 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
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26 Foam::DILUPreconditioner
29 Simplified diagonal-based incomplete LU preconditioner for asymmetric
30 matrices. The reciprocal of the preconditioned diagonal is calculated
36 \*---------------------------------------------------------------------------*/
38 #ifndef DILUPreconditioner_H
39 #define DILUPreconditioner_H
41 #include "lduMatrix.H"
43 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
48 /*---------------------------------------------------------------------------*\
49 Class DILUPreconditioner Declaration
50 \*---------------------------------------------------------------------------*/
52 class DILUPreconditioner
54 public lduMatrix::preconditioner
58 //- The reciprocal preconditioned diagonal
64 //- Runtime type information
70 //- Construct from matrix components and preconditioner solver controls
73 const lduMatrix::solver&,
74 const dictionary& solverControlsUnused
80 virtual ~DILUPreconditioner()
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
97 //- Return wT the transpose-matrix preconditioned form of residual rT.
98 virtual void preconditionT
101 const scalarField& rT,
102 const direction cmpt=0
107 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
109 } // End namespace Foam
111 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
115 // ************************************************************************* //