TrioCFD 1.9.8
TrioCFD documentation
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Coloc_Operator_tools.h
1/****************************************************************************
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15
16#ifndef Coloc_Operator_tools_included
17#define Coloc_Operator_tools_included
18
19#include <algorithm>
20#include <cmath>
21
22inline void compute_hll_bounds(const DoubleTab& vit_n, const DoubleTab& c, const int f, const int el, const int er, const int nb_phases, double& Sm, double& Sp)
23{
24 Sm = 0.;
25 Sp = 0.;
26 for (int n = 0; n < nb_phases; n++)
27 {
28 const double un_l = vit_n(f, n);
29 const double un_r = vit_n(f, n + nb_phases);
30 const double c_l = c(el, n), c_r = c(er, n);
31 const double Sm_k = std::min(un_l - c_l, un_r - c_r);
32 const double Sp_k = std::max(un_l + c_l, un_r + c_r);
33
34 Sm = std::min(Sm, std::min(0.0, Sm_k));
35 Sp = std::max(Sp, std::max(0.0, Sp_k));
36 }
37}
38
39inline double compute_rusanov_speed(const DoubleTab& vit_n, const DoubleTab& c, const int f, const int el, const int er, const int n, const int nb_phases)
40{
41 const double un_l = vit_n(f, n);
42 const double un_r = vit_n(f, n + nb_phases);
43 const double c_l = c(el, n), c_r = c(er, n);
44 double s = std::max(fabs(un_l - c_l), fabs(un_l + c_l));
45
46 s = std::max(s, std::max(fabs(un_r - c_r), fabs(un_r + c_r)));
47 return s;
48}
49
50inline void compute_non_conservative_hll_left_bounds(const DoubleTab& vit_n, const DoubleTab& c, const int f, const int el, const int er,
51 const int m, const int n, const int nb_phases, double& Sm, double& Sp, double& un)
52{
53 int k = m; // index pressure
54 double un_l = vit_n(f, k);
55 double un_r = vit_n(f, k + nb_phases);
56 double c_l = c(el, k);
57 double c_r = c(er, k);
58 const double Sm1 = std::min(un_l - c_l, un_r - c_r);
59 const double Sp1 = std::max(un_l + c_l, un_r + c_r);
60
61 k = n; // index velocity
62 un_l = vit_n(f, k);
63 un_r = vit_n(f, k + nb_phases);
64 c_l = c(el, k);
65 c_r = c(er, k);
66 const double Sm2 = std::min(un_l - c_l, un_r - c_r);
67 const double Sp2 = std::max(un_l + c_l, un_r + c_r);
68
69 Sm = std::min(0.0, std::min(Sm1, Sm2));
70 Sp = std::max(0.0, std::max(Sp1, Sp2));
71 un = un_l;
72}
73
74inline void compute_non_conservative_hll_right_bounds(const DoubleTab& vit_n, const DoubleTab& c, const int f, const int el, const int er,
75 const int m, const int n, const int nb_phases, double& Sm, double& Sp, double& un)
76{
77 int k = m; // index pressure
78 double un_r = -vit_n(f, k);
79 double un_l = -vit_n(f, k + nb_phases);
80 double c_l = c(er, k);
81 double c_r = c(el, k);
82 const double Sm1 = std::min(un_l - c_l, un_r - c_r);
83 const double Sp1 = std::max(un_l + c_l, un_r + c_r);
84
85 k = n; // index velocity
86 un_r = -vit_n(f, k);
87 un_l = -vit_n(f, k + nb_phases);
88 c_l = c(er, k);
89 c_r = c(el, k);
90 const double Sm2 = std::min(un_l - c_l, un_r - c_r);
91 const double Sp2 = std::max(un_l + c_l, un_r + c_r);
92
93 Sm = std::min(0.0, std::min(Sm1, Sm2));
94 Sp = std::max(0.0, std::max(Sp1, Sp2));
95 un = un_l;
96}
97
98#endif /*Coloc_Operator_tools_included*/