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TerminalOutflow.cpp
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2 //
3 // File CommMpi.cpp
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31 //
32 // Description: ROuflow class
33 //
34 ///////////////////////////////////////////////////////////////////////////////
35 
37 
38 using namespace std;
39 
40 namespace Nektar
41 {
42 
43  std::string TerminalOutflow::className
45  "Terminal",
46  TerminalOutflow::create,
47  "Terminal outflow boundary condition");
48 
49  /**
50  *
51  */
52  TerminalOutflow::TerminalOutflow(Array<OneD, MultiRegions::ExpListSharedPtr> pVessel,
54  PulseWavePressureAreaSharedPtr pressureArea)
55  : PulseWaveBoundary(pVessel,pSession,pressureArea)
56  {
57  }
58 
59  /**
60  *
61  */
63  {
64 
65  }
66 
68  const Array<OneD,const Array<OneD, NekDouble> > &inarray,
71  const NekDouble time,
72  int omega,int offset,int n)
73  {
74  NekDouble A_r, u_r;
75  NekDouble RT, A_l, u_l, u_0, c_0, c_l;
76 
78 
79  vessel[0] = m_vessels[2*omega];
80  vessel[1] = m_vessels[2*omega+1];
81 
82  /* Find the terminal resistance boundary condition and
83  * calculate the reflection. We assume A_r = A_l and
84  * apply the reflection in u_r after paper
85  * "Computational Modelling of 1D blood flow"*/
86 
87  // Note: The R_t value is contained in A in the inputfile
88  RT = (vessel[0]->UpdateBndCondExpansion(n))->GetCoeffs()[0];
89 
90  ASSERTL0((-1<=RT && RT<=1),
91  "RT must be comprised between -1 and 1");
92  int nq = vessel[0]->GetTotPoints();
93 
94  // Get the left values A_l and u_l needed for Eq. 37
95  A_l = inarray[0][offset+nq-1];
96  u_l = inarray[1][offset+nq-1];
97 
98  // Get the values at initial state u_0, c_0
99  u_0 = 0.0; //for all vessels start from initial condition 0
100  c_0 = sqrt(beta[omega][nq-1]/(2*m_rho))*sqrt(sqrt(A_0[omega][nq-1]));
101 
102  // Calculate the boundary values
103  A_r = A_l;
104  c_l = sqrt(beta[omega][nq-1]/(2*m_rho))*sqrt(sqrt(A_l));
105  u_r = (1-RT)*((u_l-u_0) + 4*(c_l-c_0)) - u_l;
106 
107  // Store the new values in the boundary condition
108  (vessel[0]->UpdateBndCondExpansion(n))->UpdatePhys()[0] = A_r;
109  (vessel[1]->UpdateBndCondExpansion(n))->UpdatePhys()[0] = u_r;
110  }
111 
112 }
#define ASSERTL0(condition, msg)
Definition: ErrorUtil.hpp:161
STL namespace.
Array< OneD, MultiRegions::ExpListSharedPtr > m_vessels
boost::shared_ptr< SessionReader > SessionReaderSharedPtr
Definition: MeshPartition.h:51
BoundaryFactory & GetBoundaryFactory()
virtual void v_DoBoundary(const Array< OneD, const Array< OneD, NekDouble > > &inarray, Array< OneD, Array< OneD, NekDouble > > &A_0, Array< OneD, Array< OneD, NekDouble > > &beta, const NekDouble time, int omega, int offset, int n)
double NekDouble
boost::shared_ptr< PulseWavePressureArea > PulseWavePressureAreaSharedPtr
tKey RegisterCreatorFunction(tKey idKey, CreatorFunction classCreator, tDescription pDesc="")
Register a class with the factory.
Definition: NekFactory.hpp:215