1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
#include "../c++/lbm.hpp"
#include "../c++/collision.hpp"
#include "../c++/boundary.hpp"
#include <forstio/codec/data.hpp>
namespace kel {
namespace lbm {
namespace sch {
using namespace saw::schema;
/**
* Basic distribution function
* Base type
* D
* Q
* Scalar factor
* D factor
* Q factor
*/
using T = Float32;
using D2Q5 = Descriptor<2u,5u>;
using D2Q9 = Descriptor<2u,9u>;
template<typename Desc>
using DfCell = Cell<T, Desc, 0u, 0u, 1u>;
template<typename Desc>
using CellInfo = Cell<UInt8, D2Q9, 1u, 0u, 0u>;
/**
* Basic type for simulation
*/
template<typename Desc>
using CellStruct = Struct<
Member<DfCell<Desc>, "dfs">,
Member<DfCell<Desc>, "dfs_old">,
Member<CellInfo<Desc>, "info">
>;
using CavityFieldD2Q9 = CellField<D2Q9, CellStruct<D2Q9>>;
}
}
}
void set_geometry(saw::data<kel::lbm::sch::CavityFieldD2Q9>& latt){
using namespace kel::lbm;
auto meta = latt.meta();
for(saw::data<sch::UInt64> i{0u}; i < meta.at(0u); ++i){
for(saw::data<sch::UInt64> j{0u}; j < meta.at(1u); ++j ){
auto& cell = latt({{i,j}});
auto& info = cell.template get<"info">();
// if()
}
}
}
void set_initial_conditions(saw::data<kel::lbm::sch::CavityFieldD2Q9>& latt){
using namespace kel::lbm;
typename saw::native_data_type<sch::T>::type rho = 1.0;
auto meta = latt.meta();
// Collide
for(saw::data<sch::UInt64> i{0u}; i < meta.at(0u); ++i){
for(saw::data<sch::UInt64> j{0u}; j < meta.at(1u); ++j ){
auto& cell = latt({{i,j}});
auto& info = cell.template get<"info">();
}
}
/*
{
std::array<typename saw::native_data_type<sch::T>::type, sch::D2Q9::D> vel = {0.0, 0.0};
auto eq = equilibrium<sch::D2Q9>(rho, vel);
apply_for_cells([&eq](auto& cell, std::size_t i, std::size_t j){
(void) i;
(void) j;
auto& dfs = cell.template get<"dfs">();
auto& dfs_old = cell.template get<"dfs_old">();
auto info = cell.template get<"info">()(0u).get();
for(uint64_t k = 0; k < sch::D2Q9::Q; ++k){
dfs(k).set(eq[k]);
dfs_old(k).set(eq[k]);
}
}, latt);
}
*/
}
int main(int argc, char** argv){
using namespace kel::lbm;
std::string_view cfg_file_name = "config.json";
if(argc > 1){
cfg_file_name = argv[1];
}
auto eo_conf = load_lbm_config<sch::Float64,sch::Descriptor<2u,9u>>(cfg_file_name);
if(eo_conf.is_error()){
auto& err = eo_conf.get_error();
std::cerr<<"[Error]: "<<err.get_category();
auto err_msg = err.get_message();
if(!err_msg.empty()){
std::cerr<<" - "<<err_msg;
}
std::cerr<<std::endl;
return err.get_id();
}
auto& conf = eo_conf.get_value();
converter<sch::Float64> conv{
{conf.template get<"delta_x">()},
{conf.template get<"delta_t">()}
};
print_lbm_meta<sch::Float64,sch::Descriptor<2u,9u>>(conv, {conf.template get<"kinematic_viscosity">()});
saw::data<sch::FixedArray<sch::UInt64,sch::D2Q9::D>> dim{{1024, 128}};
saw::data<sch::CavityFieldD2Q9, saw::encode::Native> lattice{dim};
saw::data<sch::Array<sch::MacroStruct<sch::T,sch::D2Q9::D>,sch::D2Q9::D>> macros{dim};
for(uint64_t i = 0u; i < 256u; ++i){
{
std::string vtk_f_name{"tmp/poiseulle_2d_"};
vtk_f_name += std::to_string(i) + ".vtk";
write_vtk_file(vtk_f_name, macros);
}
lbm_step(lattice, even_step, step);
}
return 0;
}
|
