FreeFOAM The Cross-Platform CFD Toolkit
DILUSmoother.C
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1 /*---------------------------------------------------------------------------*\
2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4  \\ / O peration |
5  \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
6  \\/ M anipulation |
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24 \*---------------------------------------------------------------------------*/
25 
26 #include "DILUSmoother.H"
28 
29 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
30 
31 namespace Foam
32 {
33  defineTypeNameAndDebug(DILUSmoother, 0);
34 
35  lduMatrix::smoother::addasymMatrixConstructorToTable<DILUSmoother>
37 }
38 
39 
40 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
41 
43 (
44  const word& fieldName,
45  const lduMatrix& matrix,
46  const FieldField<Field, scalar>& interfaceBouCoeffs,
47  const FieldField<Field, scalar>& interfaceIntCoeffs,
48  const lduInterfaceFieldPtrsList& interfaces
49 )
50 :
52  (
53  fieldName,
54  matrix,
55  interfaceBouCoeffs,
56  interfaceIntCoeffs,
57  interfaces
58  ),
59  rD_(matrix_.diag())
60 {
61  DILUPreconditioner::calcReciprocalD(rD_, matrix_);
62 }
63 
64 
65 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
66 
68 (
70  const scalarField& source,
71  const direction cmpt,
72  const label nSweeps
73 ) const
74 {
75  const scalar* const __restrict__ rDPtr = rD_.begin();
76 
77  const label* const __restrict__ uPtr =
78  matrix_.lduAddr().upperAddr().begin();
79  const label* const __restrict__ lPtr =
80  matrix_.lduAddr().lowerAddr().begin();
81 
82  const scalar* const __restrict__ upperPtr = matrix_.upper().begin();
83  const scalar* const __restrict__ lowerPtr = matrix_.lower().begin();
84 
85  // Temporary storage for the residual
86  scalarField rA(rD_.size());
87  scalar* __restrict__ rAPtr = rA.begin();
88 
89  for (label sweep=0; sweep<nSweeps; sweep++)
90  {
91  matrix_.residual
92  (
93  rA,
94  psi,
95  source,
96  interfaceBouCoeffs_,
97  interfaces_,
98  cmpt
99  );
100 
101  rA *= rD_;
102 
103  register label nFaces = matrix_.upper().size();
104  for (register label face=0; face<nFaces; face++)
105  {
106  register label u = uPtr[face];
107  rAPtr[u] -= rDPtr[u]*lowerPtr[face]*rAPtr[lPtr[face]];
108  }
109 
110  register label nFacesM1 = nFaces - 1;
111  for (register label face=nFacesM1; face>=0; face--)
112  {
113  register label l = lPtr[face];
114  rAPtr[l] -= rDPtr[l]*upperPtr[face]*rAPtr[uPtr[face]];
115  }
116 
117  psi += rA;
118  }
119 }
120 
121 
122 // ************************ vim: set sw=4 sts=4 et: ************************ //