Nektar++
WeakPressureExtrapolate.cpp
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1///////////////////////////////////////////////////////////////////////////////
2//
3// File: WeakPressureExtrapolate.cpp
4//
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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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30//
31// Description: Abstract base class for WeakPressureExtrapolate.
32//
33///////////////////////////////////////////////////////////////////////////////
34
36
37namespace Nektar
38{
39/**
40 * Registers the class with the Factory.
41 */
44 "WeakPressure", WeakPressureExtrapolate::create, "WeakPressure");
45
47 LibUtilities::SessionReader::RegisterEnumValue("SolverType", "WeakPressure",
53 const SolverUtils::AdvectionSharedPtr advObject)
54 : StandardExtrapolate(pSession, pFields, pPressure, pVel, advObject)
55{
56}
57
58/**
59 * Function to extrapolate the new pressure boundary condition.
60 * Based on the velocity field and on the advection term.
61 * Acceleration term is also computed. This routine is a general
62 * one for 2d and 3D application and it can be called directly
63 * from velocity correction scheme. Specialisation on
64 * dimensionality is redirected to the CalcNeumannPressureBCs
65 * method.
66 */
68 const Array<OneD, const Array<OneD, NekDouble>> &fields,
69 const Array<OneD, const Array<OneD, NekDouble>> &N, NekDouble kinvis)
70{
72 if (m_HBCnumber > 0)
73 {
74 // Calculate just viscous BCs at current level and put in
75 // m_pressureHBCs[nlevels-1]
76 CalcNeumannPressureBCs(fields, N, kinvis);
77
78 // Extrapolate to m_pressureHBCs to n+1
80
81 // \int_bnd q n.u^{n} ds update current normal of field
82 // add m_pressureHBCs to gamma_0/Dt * m_acceleration[0]
83 AddVelBC();
84
85 // Copy m_pressureHBCs to m_PbndExp
87 }
88
89 // Evaluate High order outflow conditions if required.
90 CalcOutflowBCs(fields, kinvis);
91}
92
93// In weak pressure formulation we also require \int q u.n ds on
94// outflow boundary
96 [[maybe_unused]] const int noutflow, const int nreg,
98{
99 if (!m_houtflow.get()) // no outflow on partition so just return
100 {
101 return;
102 }
103
104 int nbcoeffs = m_PBndExp[nreg]->GetNcoeffs();
105 // int nqb = m_PBndExp[nreg]->GetTotPoints();
106
107 Array<OneD, NekDouble> IProdVnTmp(nbcoeffs);
108
109#if 0
111
112 for(int i = 0; i < m_curl_dim; ++i)
113 {
114 EvaluateBDFArray(m_houtflow->m_outflowVelBnd[noutflow][i]);
115
116 ubnd[i] = m_houtflow->m_outflowVelBnd[noutflow][i][m_intSteps-1];
117
118 // point input u to the first part of the array for later uee.
119 // u[i] = m_houtflow->m_outflowVelBnd[noutflow][i][0];
120 u[i] = ubnd[i];
121 }
122
123 m_PBndExp[nreg]->NormVectorIProductWRTBase(ubnd,IProdVnTmp);
124#endif
125 m_PBndExp[nreg]->NormVectorIProductWRTBase(u, IProdVnTmp);
126
127 Vmath::Svtvp(nbcoeffs, -1.0 / m_timestep, IProdVnTmp, 1,
128 m_PBndExp[nreg]->UpdateCoeffs(), 1,
129 m_PBndExp[nreg]->UpdateCoeffs(), 1);
130}
131
132/**
133 * vritual function which only puts in the curl operator into the bcs
134 */
136 int HBCdata, NekDouble kinvis, Array<OneD, NekDouble> &Q,
137 [[maybe_unused]] Array<OneD, const NekDouble> &Advection)
138{
139 Vmath::Smul(HBCdata, -kinvis, Q, 1, Q, 1);
140}
141
142} // namespace Nektar
Array< OneD, Array< OneD, NekDouble > > m_pressureHBCs
Storage for current and previous levels of high order pressure boundary conditions.
Definition: Extrapolate.h:277
int m_curl_dim
Curl-curl dimensionality.
Definition: Extrapolate.h:247
void CopyPressureHBCsToPbndExp(void)
void EvaluateBDFArray(Array< OneD, Array< OneD, NekDouble > > &array)
int m_intSteps
Maximum points used in pressure BC evaluation.
Definition: Extrapolate.h:271
void CalcNeumannPressureBCs(const Array< OneD, const Array< OneD, NekDouble > > &fields, const Array< OneD, const Array< OneD, NekDouble > > &N, NekDouble kinvis)
Definition: Extrapolate.h:132
HighOrderOutflowSharedPtr m_houtflow
Definition: Extrapolate.h:291
NekDouble m_timestep
Definition: Extrapolate.h:273
Array< OneD, MultiRegions::ExpListSharedPtr > m_PBndExp
pressure boundary conditions expansion container
Definition: Extrapolate.h:256
void ExtrapolateArray(Array< OneD, Array< OneD, NekDouble > > &array)
int m_pressureCalls
number of times the high-order pressure BCs have been called
Definition: Extrapolate.h:262
void CalcOutflowBCs(const Array< OneD, const Array< OneD, NekDouble > > &fields, NekDouble kinvis)
tKey RegisterCreatorFunction(tKey idKey, CreatorFunction classCreator, std::string pDesc="")
Register a class with the factory.
static std::string RegisterEnumValue(std::string pEnum, std::string pString, int pEnumValue)
Registers an enumeration value.
An abstract base class encapsulating the concept of advection of a vector field.
Definition: Advection.h:81
void v_MountHOPBCs(int HBCdata, NekDouble kinvis, Array< OneD, NekDouble > &Q, Array< OneD, const NekDouble > &Advection) override
static std::string className
Name of class.
void v_AddNormVelOnOBC(const int nbcoeffs, const int nreg, Array< OneD, Array< OneD, NekDouble > > &u) override
static ExtrapolateSharedPtr create(const LibUtilities::SessionReaderSharedPtr &pSession, Array< OneD, MultiRegions::ExpListSharedPtr > &pFields, MultiRegions::ExpListSharedPtr &pPressure, const Array< OneD, int > &pVel, const SolverUtils::AdvectionSharedPtr &advObject)
Creates an instance of this class.
void v_EvaluatePressureBCs(const Array< OneD, const Array< OneD, NekDouble > > &fields, const Array< OneD, const Array< OneD, NekDouble > > &N, NekDouble kinvis) override
WeakPressureExtrapolate(const LibUtilities::SessionReaderSharedPtr pSession, Array< OneD, MultiRegions::ExpListSharedPtr > pFields, MultiRegions::ExpListSharedPtr pPressure, const Array< OneD, int > pVel, const SolverUtils::AdvectionSharedPtr advObject)
std::shared_ptr< SessionReader > SessionReaderSharedPtr
std::shared_ptr< ExpList > ExpListSharedPtr
Shared pointer to an ExpList object.
std::shared_ptr< Advection > AdvectionSharedPtr
A shared pointer to an Advection object.
Definition: Advection.h:54
ExtrapolateFactory & GetExtrapolateFactory()
Definition: Extrapolate.cpp:47
double NekDouble
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.hpp:396
void Smul(int n, const T alpha, const T *x, const int incx, T *y, const int incy)
Scalar multiply y = alpha*x.
Definition: Vmath.hpp:100