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ArtificialDiffusion.cpp
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1 ///////////////////////////////////////////////////////////////////////////////
2 //
3 // File: ArtificialDiffusion.cpp
4 //
5 // For more information, please see: http://www.nektar.info
6 //
7 // The MIT License
8 //
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).
12 //
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31 //
32 // Description: Abstract base class for compressible solver artificial diffusion
33 // used for shock capturing artificial diffusion.
34 //
35 ///////////////////////////////////////////////////////////////////////////////
36 
37 #include "ArtificialDiffusion.h"
38 
39 using namespace std;
40 
41 namespace Nektar
42 {
44 {
45  typedef Loki::SingletonHolder<ArtificialDiffusionFactory,
46  Loki::CreateUsingNew,
47  Loki::NoDestroy,
48  Loki::SingleThreaded> Type;
49  return Type::Instance();
50 }
51 
52 ArtificialDiffusion::ArtificialDiffusion(
55  const int spacedim)
56  : m_session(pSession),
57  m_fields(pFields)
58 {
59  m_session->LoadParameter ("FL", m_FacL, 0.0);
60  m_session->LoadParameter ("FH", m_FacH, 0.0);
61  m_session->LoadParameter ("hFactor", m_hFactor, 1.0);
62  m_session->LoadParameter ("C1", m_C1, 3.0);
63  m_session->LoadParameter ("C2", m_C2, 5.0);
64  m_session->LoadParameter ("mu0", m_mu0, 1.0);
65  m_session->LoadParameter ("Skappa", m_Skappa, -2.048);
66  m_session->LoadParameter ("Kappa", m_Kappa, 0.0);
67 
68  // Create auxiliary object to convert variables
70  m_session, spacedim);
71 
73  .CreateInstance("LDG", "LDG");
74  m_diffusion->SetArtificialDiffusionVector(
76  m_diffusion->InitObject (m_session, m_fields);
77 }
78 
79 /**
80  *
81  */
83  const Array<OneD, const Array<OneD, NekDouble> > &inarray,
84  Array<OneD, Array<OneD, NekDouble> > &outarray)
85 {
86  v_DoArtificialDiffusion(inarray, outarray);
87 }
88 
89 /**
90  *
91  */
93  const Array<OneD, const Array<OneD, NekDouble> > &inarray,
94  Array<OneD, Array<OneD, NekDouble> > &outarray)
95 {
96  int i;
97  int nvariables = inarray.num_elements();
98  int npoints = m_fields[0]->GetNpoints();
99 
100  Array<OneD, Array<OneD, NekDouble> > outarrayDiff(nvariables);
101 
102  for (i = 0; i < nvariables; ++i)
103  {
104  outarrayDiff[i] = Array<OneD, NekDouble>(npoints, 0.0);
105  }
106 
107  m_diffusion->Diffuse(nvariables, m_fields, inarray, outarrayDiff);
108 
109  for (i = 0; i < nvariables; ++i)
110  {
111  Vmath::Vadd(npoints,
112  outarray[i], 1,
113  outarrayDiff[i], 1,
114  outarray[i], 1);
115  }
116 }
117 
118 /**
119  *
120  */
122  const Array<OneD, Array<OneD, NekDouble> > &physfield,
124 {
125  v_GetArtificialViscosity(physfield, mu);
126 }
127 
128 }
LibUtilities::NekFactory< std::string, ArtificialDiffusion, const LibUtilities::SessionReaderSharedPtr &, const Array< OneD, MultiRegions::ExpListSharedPtr > &, const int > ArtificialDiffusionFactory
Declaration of the artificial diffusion factory.
tBaseSharedPtr CreateInstance(tKey idKey BOOST_PP_COMMA_IF(MAX_PARAM) BOOST_PP_ENUM_BINARY_PARAMS(MAX_PARAM, tParam, x))
Create an instance of the class referred to by idKey.
Definition: NekFactory.hpp:162
static boost::shared_ptr< DataType > AllocateSharedPtr()
Allocate a shared pointer from the memory pool.
void DoArtificialDiffusion(const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray)
Apply the artificial diffusion.
DiffusionFactory & GetDiffusionFactory()
Definition: Diffusion.cpp:42
STL namespace.
boost::shared_ptr< SessionReader > SessionReaderSharedPtr
Definition: MeshPartition.h:51
SolverUtils::DiffusionSharedPtr m_diffusion
LDG Diffusion operator.
virtual void v_GetArtificialViscosity(const Array< OneD, Array< OneD, NekDouble > > &physfield, Array< OneD, NekDouble > &mu)=0
ArtificialDiffusionFactory & GetArtificialDiffusionFactory()
Declaration of the artificial diffusion factory singleton.
LibUtilities::SessionReaderSharedPtr m_session
Session reader.
NekDouble m_FacL
Parameters.
virtual void v_DoArtificialDiffusion(const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &outarray)
void GetArtificialViscosity(const Array< OneD, Array< OneD, NekDouble > > &physfield, Array< OneD, NekDouble > &mu)
Calculate the artificial viscosity.
VariableConverterSharedPtr m_varConv
Auxiliary object to convert variables.
Array< OneD, MultiRegions::ExpListSharedPtr > m_fields
Array of fields.
void Vadd(int n, const T *x, const int incx, const T *y, const int incy, T *z, const int incz)
Add vector z = x+y.
Definition: Vmath.cpp:299
Provides a generic Factory class.
Definition: NekFactory.hpp:116