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PreconditionerLinearWithBlock.cpp
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1 ///////////////////////////////////////////////////////////////////////////////
2 //
3 // File Preconditioner.cpp
4 //
5 // For more information, please see: http://www.nektar.info
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7 // The MIT License
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9 // Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
10 // Department of Aeronautics, Imperial College London (UK), and Scientific
11 // Computing and Imaging Institute, University of Utah (USA).
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31 //
32 // Description: Preconditioner definition
33 //
34 ///////////////////////////////////////////////////////////////////////////////
35 
39 #include <LocalRegions/MatrixKey.h>
40 #include <math.h>
41 
42 namespace Nektar
43 {
44  namespace MultiRegions
45  {
46  /**
47  * Registers the class with the Factory.
48  */
49 
52  "FullLinearSpaceWithBlock",
54  "Full Linear space and block preconditioning");
55 
56  /**
57  * @class PreconditionerLinearWithBlock
58  *
59  * This class implements preconditioning for the conjugate
60  * gradient matrix solver.
61  */
62 
64  const boost::shared_ptr<GlobalLinSys> &plinsys,
65  const AssemblyMapSharedPtr &pLocToGloMap)
66  : Preconditioner(plinsys, pLocToGloMap)
67  {
68  }
69 
70  /**
71  *
72  */
74  {
77  }
78 
79  /**
80  *
81  */
83  {
84  m_linSpacePrecon->BuildPreconditioner();
85  m_blockPrecon->BuildPreconditioner();
86  }
87 
88 
89  /**
90  *
91  */
93  const Array<OneD, NekDouble>& pInput,
94  Array<OneD, NekDouble>& pOutput)
95  {
96  int nGlobal = pInput.num_elements();
97 
98  Array<OneD, NekDouble> OutputBlock(nGlobal, 0.0);
99  Array<OneD, NekDouble> OutputLinear(nGlobal, 0.0);
100  Array<OneD, NekDouble> InputLinear(nGlobal, 0.0);
101 
102  //Apply Low Energy preconditioner
103  m_blockPrecon->DoPreconditioner(pInput, OutputBlock);
104 
105  //Apply linear space preconditioner
106  m_linSpacePrecon->DoPreconditionerWithNonVertOutput(pInput, pOutput,OutputBlock);
107  }
108 
109  }
110 }
111 
112 
113 
114 
115 
116