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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
"""Tests for the simple_inlet_outlet.
Copyright (c) 2015, Prabhu Ramachandran
License: BSD
"""
import numpy as np
try:
# This is for Python-2.6.x
import unittest2 as unittest
except ImportError:
import unittest
from pysph.base.utils import get_particle_array
from pysph.base.kernels import QuinticSpline
from pysph.sph.bc.inlet_outlet_manager import (
InletInfo, OutletInfo, InletBase, OutletBase)
class TestSimpleInlet1D(unittest.TestCase):
def setUp(self):
dx = 0.1
x = np.arange(-5*dx, 0.0, dx)
m = np.ones_like(x)
h = np.ones_like(x)*dx*1.5
p = np.ones_like(x)*5.0
self.inlet_pa = get_particle_array(name='inlet', x=x, m=m, h=h, p=p)
# Empty particle array.
self.dest_pa = get_particle_array(name='fluid')
props = ['ioid', 'disp']
for p in props:
for pa_arr in [self.dest_pa, self.inlet_pa]:
pa_arr.add_property(p)
self.dx = dx
self.kernel = QuinticSpline(dim=1)
self.inletinfo = InletInfo('inlet', normal=[-1., 0., 0.],
refpoint=[-dx/2, 0., 0.])
self.inletinfo.length = 0.5
def test_update_creates_particles_in_destination(self):
# Given
inlet = InletBase(
self.inlet_pa, self.dest_pa, self.inletinfo,
dim=1, kernel=self.kernel)
# Two rows of particles should move out.
self.inlet_pa.x += 0.12
# When
inlet.update(time=0.0, dt=0.0, stage=1)
# Then
x = self.inlet_pa.x
p = self.inlet_pa.p
h = self.inlet_pa.h
self.assertEqual(len(x), 5)
x_expect = (-np.arange(5, 0, -1)*self.dx + 0.12)
x_expect[x_expect > 0.0] -= 0.5
self.assertTrue(np.allclose(list(x), list(x_expect)))
self.assertTrue(np.allclose(p, np.ones_like(x)*5, atol=1e-14))
self.assertTrue(
np.allclose(h, np.ones_like(x)*self.dx*1.5, atol=1e-14)
)
# The destination particle array should now have one particles.
x = self.dest_pa.x
p = self.dest_pa.p
h = self.dest_pa.h
self.assertEqual(self.dest_pa.get_number_of_particles(), 1)
x_expect = (-np.arange(1, 0, -1)*self.dx + 0.12)
self.assertTrue(np.allclose(list(x), list(x_expect)))
self.assertTrue(np.allclose(p, np.ones_like(x)*5, atol=1e-14))
self.assertTrue(
np.allclose(h, np.ones_like(x)*self.dx*1.5, atol=1e-14)
)
def test_particles_should_update_in_given_stage(self):
# Given
inlet = InletBase(
self.inlet_pa, self.dest_pa, self.inletinfo,
dim=1, kernel=self.kernel)
# Two rows of particles should move out.
self.inlet_pa.x += 0.15
inlet.active_stages = [1]
# When
inlet.update(time=0.0, dt=0.0, stage=2)
# Then
x = self.inlet_pa.x
p = self.inlet_pa.p
h = self.inlet_pa.h
self.assertEqual(len(x), 5)
x_expect = (-np.arange(5, 0, -1)*self.dx + 0.15)
self.assertTrue(np.allclose(list(x), list(x_expect)))
self.assertTrue(np.allclose(p, np.ones_like(x)*5, atol=1e-14))
self.assertTrue(
np.allclose(h, np.ones_like(x)*self.dx*1.5, atol=1e-14)
)
# The destination particle array should not have particles.
self.assertEqual(self.dest_pa.get_number_of_particles(), 0)
def test_inlet_calls_callback(self):
# Given
calls = []
def _callback(d, i):
calls.append((d, i))
inlet = InletBase(
self.inlet_pa, self.dest_pa, self.inletinfo,
dim=1.0, kernel=self.kernel, callback=_callback)
# When
self.inlet_pa.x += 0.5
inlet.update(time=0.0, dt=0.0, stage=1)
# Then
self.assertEqual(len(calls), 1)
d_pa, i_pa = calls[0]
self.assertEqual(d_pa, self.dest_pa)
self.assertEqual(i_pa, self.inlet_pa)
class TestSimpleOutlet1D(unittest.TestCase):
def setUp(self):
dx = 0.1
x = np.arange(-5*dx, 0.0, dx)
m = np.ones_like(x)
h = np.ones_like(x)*dx*1.5
p = np.ones_like(x)*5.0
self.source_pa = get_particle_array(name='fluid', x=x, m=m, h=h, p=p)
# Empty particle array.
self.outlet_pa = get_particle_array(name='outlet')
props = ['ioid', 'disp']
for p in props:
for pa_arr in [self.source_pa, self.outlet_pa]:
pa_arr.add_property(p)
self.dx = dx
self.kernel = QuinticSpline(dim=1)
self.outletinfo = OutletInfo(
'outlet', normal=[1., 0., 0.], refpoint=[-dx/2, 0., 0.],
props_to_copy=self.source_pa.get_lb_props())
self.outletinfo.length = 0.5
def test_outlet_absorbs_particles_from_source(self):
# Given
outlet = OutletBase(
self.outlet_pa, self.source_pa, self.outletinfo,
dim=1, kernel=self.kernel)
# Two rows of particles should move out.
self.source_pa.x += 0.12
# When
outlet.update(time=0.0, dt=0.0, stage=1)
# Then
x = self.source_pa.x
p = self.source_pa.p
h = self.source_pa.h
print(x)
self.assertEqual(len(x), 4)
x_expect = (-np.arange(5, 1, -1)*self.dx + 0.12)
x_expect[x_expect > 0.0] -= 0.5
self.assertTrue(np.allclose(list(x), list(x_expect)))
self.assertTrue(np.allclose(p, np.ones_like(x)*5, atol=1e-14))
self.assertTrue(
np.allclose(h, np.ones_like(x)*self.dx*1.5, atol=1e-14)
)
# The outlet particle array should now have one particles.
x = self.outlet_pa.x
p = self.outlet_pa.p
h = self.outlet_pa.h
self.assertEqual(self.outlet_pa.get_number_of_particles(), 1)
x_expect = (-np.arange(1, 0, -1)*self.dx + 0.12)
self.assertTrue(np.allclose(list(x), list(x_expect)))
self.assertTrue(np.allclose(p, np.ones_like(x)*5, atol=1e-14))
self.assertTrue(
np.allclose(h, np.ones_like(x)*self.dx*1.5, atol=1e-14)
)
def test_particles_should_update_in_given_stage(self):
# Given
outlet = OutletBase(
self.outlet_pa, self.source_pa, self.outletinfo,
dim=1, kernel=self.kernel)
# Two rows of particles should move out.
self.source_pa.x += 0.15
outlet.active_stages = [1]
# When
outlet.update(time=0.0, dt=0.0, stage=2)
# Then
x = self.source_pa.x
p = self.source_pa.p
h = self.source_pa.h
self.assertEqual(len(x), 5)
x_expect = (-np.arange(5, 0, -1)*self.dx + 0.15)
self.assertTrue(np.allclose(list(x), list(x_expect)))
self.assertTrue(np.allclose(p, np.ones_like(x)*5, atol=1e-14))
self.assertTrue(
np.allclose(h, np.ones_like(x)*self.dx*1.5, atol=1e-14)
)
# The outlet particle array should not have particles.
self.assertEqual(self.outlet_pa.get_number_of_particles(), 0)
def test_outlet_deletes_particles(self):
# Given
outlet = OutletBase(
self.outlet_pa, self.source_pa, self.outletinfo,
dim=1, kernel=self.kernel)
# Two rows of particles should move out.
self.source_pa.x += 0.5
# When
outlet.update(time=0.0, dt=0.0, stage=1)
# Then
self.assertEqual(self.source_pa.get_number_of_particles(), 0)
self.assertEqual(self.outlet_pa.get_number_of_particles(), 5)
# When
self.outlet_pa.x += 0.12
outlet.update(time=0.0, dt=0.0, stage=1)
# The outlet particle array should delete one particle.
self.assertEqual(self.outlet_pa.get_number_of_particles(), 4)
def test_outlet_calls_callback(self):
# Given
calls = []
def _callback(s, o):
calls.append((s, o))
outlet = OutletBase(
self.outlet_pa, self.source_pa, self.outletinfo,
dim=1.0, kernel=self.kernel, callback=_callback)
# When
self.source_pa.x += 0.5
outlet.update(time=0.0, dt=0.0, stage=1)
# Then
self.assertEqual(len(calls), 1)
s_pa, o_pa = calls[0]
self.assertEqual(o_pa, self.outlet_pa)
self.assertEqual(s_pa, self.source_pa)
if __name__ == '__main__':
unittest.main()
|
