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DICPreconditioner.H
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23 
24 Class
25  Foam::DICPreconditioner
26 
27 Description
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.
31 
32 SourceFiles
33  DICPreconditioner.C
34 
35 \*---------------------------------------------------------------------------*/
36 
37 #ifndef DICPreconditioner_H
38 #define DICPreconditioner_H
39 
40 #include "lduMatrix.H"
41 
42 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
43 
44 namespace Foam
45 {
46 
47 /*---------------------------------------------------------------------------*\
48  Class DICPreconditioner Declaration
49 \*---------------------------------------------------------------------------*/
50 
52 :
54 {
55  // Private Data
56 
57  //- The reciprocal preconditioned diagonal
58  scalarField rD_;
59 
60 
61 public:
62 
63  //- Runtime type information
64  TypeName("DIC");
65 
66 
67  // Constructors
68 
69  //- Construct from matrix components and preconditioner solver controls
71  (
72  const lduMatrix::solver&,
73  const dictionary& solverControlsUnused
74  );
75 
76 
77  //- Destructor
78  virtual ~DICPreconditioner()
79  {}
80 
81 
82  // Member Functions
83 
84  //- Calculate the reciprocal of the preconditioned diagonal
85  static void calcReciprocalD(scalarField& rD, const lduMatrix& matrix);
86 
87  //- Return wA the preconditioned form of residual rA
88  virtual void precondition
89  (
90  scalarField& wA,
91  const scalarField& rA,
92  const direction cmpt=0
93  ) const;
94 };
95 
96 
97 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
98 
99 } // End namespace Foam
100 
101 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
102 
103 #endif
104 
105 // ************************************************************************* //
A list of keyword definitions, which are a keyword followed by any number of values (e...
Definition: dictionary.H:158
uint8_t direction
Definition: direction.H:45
TypeName("DIC")
Runtime type information.
virtual ~DICPreconditioner()
Destructor.
DICPreconditioner(const lduMatrix::solver &, const dictionary &solverControlsUnused)
Construct from matrix components and preconditioner solver controls.
Abstract base-class for lduMatrix solvers.
Definition: lduMatrix.H:93
virtual void precondition(scalarField &wA, const scalarField &rA, const direction cmpt=0) const
Return wA the preconditioned form of residual rA.
lduMatrix is a general matrix class in which the coefficients are stored as three arrays...
Definition: lduMatrix.H:79
Abstract base-class for lduMatrix preconditioners.
Definition: lduMatrix.H:410
static void calcReciprocalD(scalarField &rD, const lduMatrix &matrix)
Calculate the reciprocal of the preconditioned diagonal.
Simplified diagonal-based incomplete Cholesky preconditioner for symmetric matrices (symmetric equiva...
Namespace for OpenFOAM.