FreeFOAM The Cross-Platform CFD Toolkit
FDICPreconditioner.C
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25 
27 
28 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
29 
30 namespace Foam
31 {
32  defineTypeNameAndDebug(FDICPreconditioner, 0);
33 
34  lduMatrix::preconditioner::
35  addsymMatrixConstructorToTable<FDICPreconditioner>
37 }
38 
39 
40 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
41 
42 Foam::FDICPreconditioner::FDICPreconditioner
43 (
44  const lduMatrix::solver& sol,
45  const dictionary&
46 )
47 :
49  rD_(sol.matrix().diag()),
50  rDuUpper_(sol.matrix().upper().size()),
51  rDlUpper_(sol.matrix().upper().size())
52 {
53  scalar* __restrict__ rDPtr = rD_.begin();
54  scalar* __restrict__ rDuUpperPtr = rDuUpper_.begin();
55  scalar* __restrict__ rDlUpperPtr = rDlUpper_.begin();
56 
57  const label* const __restrict__ uPtr =
58  solver_.matrix().lduAddr().upperAddr().begin();
59  const label* const __restrict__ lPtr =
60  solver_.matrix().lduAddr().lowerAddr().begin();
61  const scalar* const __restrict__ upperPtr = solver_.matrix().upper().begin();
62 
63  register label nCells = rD_.size();
64  register label nFaces = solver_.matrix().upper().size();
65 
66  for (register label face=0; face<nFaces; face++)
67  {
68  rDPtr[uPtr[face]] -= sqr(upperPtr[face])/rDPtr[lPtr[face]];
69  }
70 
71  // Generate reciprocal FDIC
72  for (register label cell=0; cell<nCells; cell++)
73  {
74  rDPtr[cell] = 1.0/rDPtr[cell];
75  }
76 
77  for (register label face=0; face<nFaces; face++)
78  {
79  rDuUpperPtr[face] = rDPtr[uPtr[face]]*upperPtr[face];
80  rDlUpperPtr[face] = rDPtr[lPtr[face]]*upperPtr[face];
81  }
82 }
83 
84 
85 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
86 
88 (
89  scalarField& wA,
90  const scalarField& rA,
91  const direction
92 ) const
93 {
94  scalar* __restrict__ wAPtr = wA.begin();
95  const scalar* __restrict__ rAPtr = rA.begin();
96  const scalar* __restrict__ rDPtr = rD_.begin();
97 
98  const label* const __restrict__ uPtr =
99  solver_.matrix().lduAddr().upperAddr().begin();
100  const label* const __restrict__ lPtr =
101  solver_.matrix().lduAddr().lowerAddr().begin();
102 
103  const scalar* const __restrict__ rDuUpperPtr = rDuUpper_.begin();
104  const scalar* const __restrict__ rDlUpperPtr = rDlUpper_.begin();
105 
106  register label nCells = wA.size();
107  register label nFaces = solver_.matrix().upper().size();
108  register label nFacesM1 = nFaces - 1;
109 
110  for (register label cell=0; cell<nCells; cell++)
111  {
112  wAPtr[cell] = rDPtr[cell]*rAPtr[cell];
113  }
114 
115  for (register label face=0; face<nFaces; face++)
116  {
117  wAPtr[uPtr[face]] -= rDuUpperPtr[face]*wAPtr[lPtr[face]];
118  }
119 
120  for (register label face=nFacesM1; face>=0; face--)
121  {
122  wAPtr[lPtr[face]] -= rDlUpperPtr[face]*wAPtr[uPtr[face]];
123  }
124 }
125 
126 
127 // ************************ vim: set sw=4 sts=4 et: ************************ //