1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | foam-extend: Open Source CFD
4 \\ / O peration | Version: 3.2
5 \\ / A nd | Web: http://www.foam-extend.org
6 \\/ M anipulation | For copyright notice see file Copyright
7 -------------------------------------------------------------------------------
9 This file is part of foam-extend.
11 foam-extend is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by the
13 Free Software Foundation, either version 3 of the License, or (at your
14 option) any later version.
16 foam-extend is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
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 lduPreconditioner
57 //- The reciprocal preconditioned diagonal
63 //- Runtime type information
69 //- Construct from matrix components and preconditioner solver controls
72 const lduMatrix& matrix,
73 const FieldField<Field, scalar>& coupleBouCoeffs,
74 const FieldField<Field, scalar>& coupleIntCoeffs,
75 const lduInterfaceFieldPtrsList& interfaces,
76 const dictionary& dict
82 virtual ~DICPreconditioner()
88 //- Calculate the reciprocal of the preconditioned diagonal
89 static void calcReciprocalD(scalarField& rD, const lduMatrix& matrix);
91 //- Execute preconditioning
92 virtual void precondition
95 const scalarField& rA,
96 const direction cmpt = 0
101 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
103 } // End namespace Foam
105 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
109 // ************************************************************************* //