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SubSteppingExtrapolateWeakPressure.cpp
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3 // File: SubSteppingExtrapolateWeakPressure.cpp
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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
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31 //
32 // Description: Abstract base class for SubSteppingExtrapolate with Weak Pressure VCS
33 // mainly redefines SubStepSetPressureBCs
34 ///////////////////////////////////////////////////////////////////////////////
35 
38 
39 using namespace std;
40 
41 namespace Nektar
42 {
43  /**
44  * Registers the class with the Factory.
45  */
46  std::string SubSteppingExtrapolateWeakPressure::className = GetExtrapolateFactory().RegisterCreatorFunction(
47  "SubSteppingWeakPressure",
48  SubSteppingExtrapolateWeakPressure::create,
49  "SubSteppingWeakPressure");
50 
51  SubSteppingExtrapolateWeakPressure::SubSteppingExtrapolateWeakPressure(
55  const Array<OneD, int> pVel,
56  const SolverUtils::AdvectionSharedPtr advObject)
57  : SubSteppingExtrapolate(pSession,pFields,pPressure,pVel,advObject)
58  {
59  }
60 
62  {
63  }
64 
66  const Array<OneD, const Array<OneD, NekDouble> > &inarray,
67  const NekDouble Aii_Dt,
68  NekDouble kinvis)
69  {
70  Array<OneD, Array<OneD, NekDouble> > nullvelfields;
71 
73 
74  // Calculate non-linear and viscous BCs at current level and
75  // put in m_pressureHBCs[0]
76  CalcNeumannPressureBCs(inarray,nullvelfields,kinvis);
77 
78  // Extrapolate to m_pressureHBCs to n+1
80 
81  // Add (phi,gamma0 u^{n+1}/Dt) term to m_presureHBC
82  AddVelBC();
83 
84  // Copy m_pressureHBCs to m_PbndExp
86 
87  // Evaluate High order outflow conditiosn if required.
88  CalcOutflowBCs(inarray, kinvis);
89  }
90 
91 
92  // In weak pressure formulation we also require \int q u.n ds on outflow boundary
93  void SubSteppingExtrapolateWeakPressure::v_AddNormVelOnOBC(const int cnt, const int nreg,
95  {
96  if(!m_houtflow.get()) // no outflow on partition so just return
97  {
98  return;
99  }
100 
101  int nbcoeffs = m_PBndExp[nreg]->GetNcoeffs();
102  //int nqb = m_PBndExp[nreg]->GetTotPoints();
103 
104  Array<OneD, NekDouble> IProdVnTmp(nbcoeffs);
105 
107 
108 
109  for(int i = 0; i < m_curl_dim; ++i)
110  {
111  EvaluateBDFArray(m_houtflow->m_outflowVelBnd[cnt][i]);
112 
113  ubnd[i] = m_houtflow->m_outflowVelBnd[cnt][i][m_intSteps-1];
114 
115  // point input u to the first part of the array for later uee.
116  u[i] = m_houtflow->m_outflowVelBnd[cnt][i][0];
117  }
118 
119  m_PBndExp[nreg]->NormVectorIProductWRTBase(ubnd,IProdVnTmp);
120 
121  Vmath::Svtvp(nbcoeffs,-1.0/m_timestep,IProdVnTmp,1,m_PBndExp[nreg]->UpdateCoeffs(),1,
122  m_PBndExp[nreg]->UpdateCoeffs(),1);
123  }
124 }
void ExtrapolateArray(Array< OneD, Array< OneD, NekDouble > > &array)
virtual void v_SubStepSetPressureBCs(const Array< OneD, const Array< OneD, NekDouble > > &inarray, NekDouble Aii_Dt, NekDouble kinvis)
Array< OneD, MultiRegions::ExpListSharedPtr > m_PBndExp
pressure boundary conditions expansion container
Definition: Extrapolate.h:242
ExtrapolateFactory & GetExtrapolateFactory()
Definition: Extrapolate.cpp:50
void Svtvp(int n, const T alpha, const T *x, const int incx, const T *y, const int incy, T *z, const int incz)
svtvp (scalar times vector plus vector): z = alpha*x + y
Definition: Vmath.cpp:485
boost::shared_ptr< Advection > AdvectionSharedPtr
A shared pointer to an Advection object.
Definition: Advection.h:165
STL namespace.
HighOrderOutflowSharedPtr m_houtflow
Definition: Extrapolate.h:272
void CopyPressureHBCsToPbndExp(void)
boost::shared_ptr< SessionReader > SessionReaderSharedPtr
Definition: MeshPartition.h:51
void EvaluateBDFArray(Array< OneD, Array< OneD, NekDouble > > &array)
int m_intSteps
Maximum points used in pressure BC evaluation.
Definition: Extrapolate.h:254
boost::shared_ptr< ExpList > ExpListSharedPtr
Shared pointer to an ExpList object.
double NekDouble
int m_pressureCalls
number of times the high-order pressure BCs have been called
Definition: Extrapolate.h:245
virtual void v_AddNormVelOnOBC(const int nbcoeffs, const int nreg, Array< OneD, Array< OneD, NekDouble > > &u)
Array< OneD, Array< OneD, NekDouble > > m_pressureHBCs
Storage for current and previous levels of high order pressure boundary conditions.
Definition: Extrapolate.h:259
int m_curl_dim
Curl-curl dimensionality.
Definition: Extrapolate.h:233
void CalcOutflowBCs(const Array< OneD, const Array< OneD, NekDouble > > &fields, NekDouble kinvis)
NekDouble m_timestep
Definition: Extrapolate.h:256
void CalcNeumannPressureBCs(const Array< OneD, const Array< OneD, NekDouble > > &fields, const Array< OneD, const Array< OneD, NekDouble > > &N, NekDouble kinvis)
Definition: Extrapolate.h:188
tKey RegisterCreatorFunction(tKey idKey, CreatorFunction classCreator, tDescription pDesc="")
Register a class with the factory.
Definition: NekFactory.hpp:215