1 | #!/usr/bin/env python |
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2 | |
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3 | import unittest, os |
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4 | import os.path |
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5 | from math import pi, sqrt |
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6 | |
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7 | from swb_domain import * |
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8 | |
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9 | from anuga.config import g |
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10 | |
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11 | import numpy as num |
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12 | |
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13 | # Get gateway to C implementation of flux function for direct testing |
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14 | from swb_domain_ext import flux_function_c |
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15 | from swb_domain_ext import gravity_c |
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16 | from swb_domain_ext import compute_fluxes_c |
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17 | |
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18 | |
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19 | class Test_swb_domain_ext(unittest.TestCase): |
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20 | def setUp(self): |
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21 | pass |
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22 | |
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23 | def tearDown(self): |
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24 | pass |
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25 | |
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26 | def test_compute_fluxes0(self): |
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27 | # Do a full triangle and check that fluxes cancel out for |
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28 | # the constant stage case |
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29 | |
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30 | a = [0.0, 0.0] |
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31 | b = [0.0, 2.0] |
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32 | c = [2.0, 0.0] |
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33 | d = [0.0, 4.0] |
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34 | e = [2.0, 2.0] |
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35 | f = [4.0, 0.0] |
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36 | |
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37 | points = [a, b, c, d, e, f] |
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38 | # bac, bce, ecf, dbe |
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39 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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40 | |
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41 | domain = Domain(points, vertices) |
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42 | domain.set_quantity('stage', [[2,2,2], [2,2,2], [2,2,2], [2,2,2]]) |
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43 | domain.check_integrity() |
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44 | domain.distribute_to_vertices_and_edges() |
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45 | |
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46 | assert num.allclose(domain.neighbours, |
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47 | [[-1,1,-2], [2,3,0], [-3,-4,1],[1,-5,-6]]) |
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48 | assert num.allclose(domain.neighbour_edges, |
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49 | [[-1,2,-1], [2,0,1], [-1,-1,0],[1,-1,-1]]) |
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50 | |
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51 | edgeflux = num.zeros(3, num.float) |
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52 | edgeflux0 = num.zeros(3, num.float) |
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53 | edgeflux1 = num.zeros(3, num.float) |
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54 | edgeflux2 = num.zeros(3, num.float) |
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55 | |
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56 | # Flux across right edge of volume 1 |
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57 | normal = domain.get_normal(1, 0) |
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58 | ql = domain.get_evolved_quantities(vol_id=1, edge=0) |
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59 | qr = domain.get_evolved_quantities(vol_id=2, edge=2) |
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60 | |
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61 | #print ql |
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62 | #print qr |
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63 | local_max_speed = flux_function_c(normal, ql, qr, edgeflux0, g) |
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64 | |
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65 | # Check that flux seen from other triangles is inverse |
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66 | (ql, qr) = (qr, ql) |
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67 | normal = domain.get_normal(2, 2) |
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68 | local_max_speed = flux_function_c(normal, ql, qr, edgeflux, g) |
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69 | |
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70 | assert num.allclose(edgeflux0 + edgeflux, 0.) |
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71 | |
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72 | # Flux across upper edge of volume 1 |
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73 | normal = domain.get_normal(1, 1) |
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74 | ql = domain.get_evolved_quantities(vol_id=1, edge=1) |
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75 | qr = domain.get_evolved_quantities(vol_id=3, edge=0) |
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76 | #print ql |
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77 | #print qr |
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78 | local_max_speed = flux_function_c(normal, ql, qr, edgeflux1, g) |
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79 | |
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80 | # Check that flux seen from other triangles is inverse |
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81 | (ql, qr) = (qr, ql) |
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82 | normal = domain.get_normal(3, 0) |
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83 | local_max_speed = flux_function_c(normal, ql, qr, edgeflux, g) |
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84 | |
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85 | assert num.allclose(edgeflux1 + edgeflux, 0.) |
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86 | |
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87 | # Flux across lower left hypotenuse of volume 1 |
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88 | normal = domain.get_normal(1, 2) |
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89 | ql = domain.get_evolved_quantities(vol_id=1, edge=2) |
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90 | qr = domain.get_evolved_quantities(vol_id=0, edge=1) |
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91 | #print ql |
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92 | #print qr |
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93 | local_max_speed = flux_function_c(normal, ql, qr, edgeflux2, g) |
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94 | |
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95 | # Check that flux seen from other triangles is inverse |
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96 | (ql, qr) = (qr, ql) |
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97 | normal = domain.get_normal(0, 1) |
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98 | max_speed = flux_function_c(normal, ql, qr, edgeflux, g) |
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99 | assert num.allclose(edgeflux2 + edgeflux, 0.) |
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100 | |
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101 | # Scale by edgelengths, add up anc check that total flux is zero |
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102 | e0 = domain.edgelengths[1, 0] |
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103 | e1 = domain.edgelengths[1, 1] |
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104 | e2 = domain.edgelengths[1, 2] |
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105 | |
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106 | assert num.allclose(e0*edgeflux0 + e1*edgeflux1 + e2*edgeflux2, 0.) |
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107 | |
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108 | # Now check that compute_flux yields zeros as well |
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109 | w = domain.quantities['stage'] |
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110 | uh = domain.quantities['xmomentum'] |
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111 | vh = domain.quantities['ymomentum'] |
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112 | h = domain.quantities['height'] |
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113 | z = domain.quantities['elevation'] |
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114 | u = domain.quantities['xvelocity'] |
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115 | v = domain.quantities['yvelocity'] |
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116 | timestep = compute_fluxes_c(2.0,domain,w,uh,vh,h,z,u,v) |
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117 | |
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118 | assert num.allclose(timestep, 0.1064794275) |
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119 | |
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120 | |
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121 | for name in ['stage', 'xmomentum', 'ymomentum']: |
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122 | assert num.allclose(domain.quantities[name].explicit_update[1], 0.0) |
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123 | |
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124 | def test_compute_fluxes1(self): |
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125 | #Use values from previous version |
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126 | a = [0.0, 0.0] |
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127 | b = [0.0, 2.0] |
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128 | c = [2.0, 0.0] |
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129 | d = [0.0, 4.0] |
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130 | e = [2.0, 2.0] |
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131 | f = [4.0, 0.0] |
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132 | |
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133 | points = [a, b, c, d, e, f] |
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134 | # bac, bce, ecf, dbe |
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135 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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136 | |
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137 | domain = Domain(points, vertices) |
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138 | val0 = 2. + 2.0/3 |
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139 | val1 = 4. + 4.0/3 |
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140 | val2 = 8. + 2.0/3 |
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141 | val3 = 2. + 8.0/3 |
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142 | |
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143 | domain.set_quantity('stage', [[val0, val0, val0], [val1, val1, val1], |
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144 | [val2, val2, val2], [val3, val3, val3]]) |
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145 | domain.check_integrity() |
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146 | domain.set_default_order(1) |
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147 | domain.distribute_to_vertices_and_edges() |
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148 | |
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149 | |
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150 | w = domain.quantities['stage'] |
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151 | uh = domain.quantities['xmomentum'] |
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152 | vh = domain.quantities['ymomentum'] |
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153 | h = domain.quantities['height'] |
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154 | z = domain.quantities['elevation'] |
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155 | u = domain.quantities['xvelocity'] |
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156 | v = domain.quantities['yvelocity'] |
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157 | |
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158 | |
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159 | edgeflux = num.zeros(3, num.float) |
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160 | edgeflux0 = num.zeros(3, num.float) |
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161 | edgeflux1 = num.zeros(3, num.float) |
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162 | edgeflux2 = num.zeros(3, num.float) |
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163 | |
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164 | |
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165 | # Flux across right edge of volume 1 |
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166 | normal = domain.get_normal(1, 0) # Get normal 0 of triangle 1 |
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167 | assert num.allclose(normal, [1, 0]) |
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168 | |
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169 | |
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170 | ql = domain.get_evolved_quantities(vol_id=1, edge=0) |
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171 | #print ql, val1 |
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172 | assert num.allclose(ql, [val1, 0, 0, val1, 0, 0, 0]) |
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173 | |
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174 | qr = domain.get_evolved_quantities(vol_id=2, edge=2) |
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175 | assert num.allclose(qr, [val2, 0, 0, val2, 0, 0, 0]) |
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176 | |
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177 | local_max_speed = flux_function_c(normal, ql, qr, edgeflux0, g) |
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178 | |
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179 | #print edgeflux0 |
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180 | #print local_max_speed |
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181 | |
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182 | # Flux across edge in the east direction (as per normal vector) |
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183 | assert num.allclose(edgeflux0, [-15.3598804, 253.71111111, 0.]) |
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184 | assert num.allclose(local_max_speed, 9.21592824046) |
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185 | |
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186 | #Flux across edge in the west direction (opposite sign for xmomentum) |
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187 | normal_opposite = domain.get_normal(2, 2) # Get normal 2 of triangle 2 |
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188 | assert num.allclose(normal_opposite, [-1, 0]) |
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189 | |
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190 | max_speed = flux_function_c(normal_opposite, ql, qr, edgeflux, g) |
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191 | assert num.allclose(edgeflux, [-15.3598804, -253.71111111, 0.]) |
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192 | |
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193 | #Flux across upper edge of volume 1 |
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194 | normal = domain.get_normal(1, 1) |
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195 | ql = domain.get_evolved_quantities(vol_id=1, edge=1) |
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196 | qr = domain.get_evolved_quantities(vol_id=3, edge=0) |
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197 | max_speed = flux_function_c(normal, ql, qr, edgeflux1, g) |
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198 | |
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199 | assert num.allclose(edgeflux1, [2.4098563, 0., 123.04444444]) |
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200 | assert num.allclose(max_speed, 7.22956891292) |
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201 | |
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202 | #Flux across lower left hypotenuse of volume 1 |
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203 | normal = domain.get_normal(1, 2) |
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204 | ql = domain.get_evolved_quantities(vol_id=1, edge=2) |
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205 | qr = domain.get_evolved_quantities(vol_id=0, edge=1) |
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206 | max_speed = flux_function_c(normal, ql, qr, edgeflux2, g) |
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207 | |
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208 | assert num.allclose(edgeflux2, [9.63942522, -61.59685738, -61.59685738]) |
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209 | assert num.allclose(max_speed, 7.22956891292) |
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210 | |
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211 | #Scale, add up and check that compute_fluxes is correct for vol 1 |
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212 | e0 = domain.edgelengths[1, 0] |
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213 | e1 = domain.edgelengths[1, 1] |
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214 | e2 = domain.edgelengths[1, 2] |
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215 | |
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216 | total_flux = -(e0*edgeflux0 + |
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217 | e1*edgeflux1 + |
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218 | e2*edgeflux2) / domain.areas[1] |
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219 | |
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220 | assert num.allclose(total_flux, [-0.68218178, -166.6, -35.93333333]) |
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221 | |
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222 | |
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223 | timestep = compute_fluxes_c(2.0,domain,w,uh,vh,h,z,u,v) |
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224 | assert num.allclose(timestep, 0.0511510624314) |
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225 | |
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226 | for i, name in enumerate(['stage', 'xmomentum', 'ymomentum']): |
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227 | assert num.allclose(total_flux[i], |
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228 | domain.quantities[name].explicit_update[1]) |
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229 | |
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230 | |
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231 | assert num.allclose(domain.quantities['stage'].explicit_update, |
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232 | [0., -0.68218178, -111.77316251, -35.68522449]) |
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233 | assert num.allclose(domain.quantities['xmomentum'].explicit_update, |
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234 | [-69.68888889, -166.6, 69.68888889, 0]) |
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235 | assert num.allclose(domain.quantities['ymomentum'].explicit_update, |
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236 | [-69.68888889, -35.93333333, 0., 69.68888889]) |
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237 | |
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238 | def test_compute_fluxes2(self): |
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239 | #Random values, incl momentum |
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240 | a = [0.0, 0.0] |
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241 | b = [0.0, 2.0] |
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242 | c = [2.0, 0.0] |
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243 | d = [0.0, 4.0] |
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244 | e = [2.0, 2.0] |
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245 | f = [4.0, 0.0] |
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246 | |
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247 | points = [a, b, c, d, e, f] |
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248 | # bac, bce, ecf, dbe |
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249 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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250 | |
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251 | domain = Domain(points, vertices) |
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252 | domain.set_default_order(1) |
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253 | |
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254 | w = domain.quantities['stage'] |
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255 | uh = domain.quantities['xmomentum'] |
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256 | vh = domain.quantities['ymomentum'] |
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257 | h = domain.quantities['height'] |
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258 | z = domain.quantities['elevation'] |
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259 | u = domain.quantities['xvelocity'] |
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260 | v = domain.quantities['yvelocity'] |
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261 | |
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262 | zl = 10 # Assume flat bed |
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263 | val0 = zl + 2. + 2.0/3 |
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264 | val1 = zl + 4. + 4.0/3 |
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265 | val2 = zl + 8. + 2.0/3 |
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266 | val3 = zl + 2. + 8.0/3 |
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267 | |
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268 | |
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269 | edgeflux = num.zeros(3, num.float) |
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270 | edgeflux0 = num.zeros(3, num.float) |
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271 | edgeflux1 = num.zeros(3, num.float) |
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272 | edgeflux2 = num.zeros(3, num.float) |
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273 | |
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274 | domain.set_quantity('elevation', zl*num.ones((4, 3), num.int)) #array default# |
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275 | |
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276 | domain.set_quantity('stage', [[val0, val0-1, val0-2], |
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277 | [val1, val1+1, val1], |
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278 | [val2, val2-2, val2], |
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279 | [val3-0.5, val3, val3]]) |
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280 | |
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281 | domain.set_quantity('xmomentum', |
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282 | [[1,2,3], [3,4,5], [1,-1,0], [0,-2,2]]) |
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283 | |
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284 | domain.set_quantity('ymomentum', |
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285 | [[1,-1,0], [0,-3,2], [0,1,0], [-1,2,2]]) |
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286 | |
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287 | domain.check_integrity() |
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288 | domain.distribute_to_vertices_and_edges() |
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289 | |
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290 | |
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291 | # Flux across right edge of volume 1 |
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292 | normal = domain.get_normal(1, 0) |
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293 | ql = domain.get_evolved_quantities(vol_id=1, edge=0) |
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294 | qr = domain.get_evolved_quantities(vol_id=2, edge=2) |
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295 | max_speed = flux_function_c(normal, ql, qr, edgeflux0, g) |
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296 | |
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297 | # Flux across upper edge of volume 1 |
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298 | normal = domain.get_normal(1, 1) |
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299 | ql = domain.get_evolved_quantities(vol_id=1, edge=1) |
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300 | qr = domain.get_evolved_quantities(vol_id=3, edge=0) |
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301 | max_speed = flux_function_c(normal, ql, qr, edgeflux1, g) |
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302 | |
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303 | # Flux across lower left hypotenuse of volume 1 |
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304 | normal = domain.get_normal(1, 2) |
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305 | ql = domain.get_evolved_quantities(vol_id=1, edge=2) |
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306 | qr = domain.get_evolved_quantities(vol_id=0, edge=1) |
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307 | max_speed = flux_function_c(normal, ql, qr, edgeflux2, g) |
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308 | |
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309 | # Scale, add up and check that compute_fluxes is correct for vol 1 |
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310 | e0 = domain.edgelengths[1, 0] |
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311 | e1 = domain.edgelengths[1, 1] |
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312 | e2 = domain.edgelengths[1, 2] |
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313 | |
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314 | total_flux = -(e0*edgeflux0 + |
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315 | e1*edgeflux1 + |
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316 | e2*edgeflux2) / domain.areas[1] |
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317 | |
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318 | timestep = compute_fluxes_c(2.0,domain,w,uh,vh,h,z,u,v) |
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319 | assert num.allclose(timestep, 0.0529903533177) |
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320 | |
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321 | for i, name in enumerate(['stage', 'xmomentum', 'ymomentum']): |
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322 | assert num.allclose(total_flux[i], |
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323 | domain.quantities[name].explicit_update[1]) |
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324 | |
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325 | # FIXME (Ole): Need test like this for fluxes in very shallow water. |
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326 | def test_compute_fluxes3(self): |
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327 | #Random values, incl momentum |
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328 | a = [0.0, 0.0] |
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329 | b = [0.0, 2.0] |
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330 | c = [2.0, 0.0] |
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331 | d = [0.0, 4.0] |
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332 | e = [2.0, 2.0] |
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333 | f = [4.0, 0.0] |
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334 | |
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335 | points = [a, b, c, d, e, f] |
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336 | # bac, bce, ecf, dbe |
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337 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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338 | |
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339 | domain = Domain(points, vertices) |
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340 | domain.set_default_order(1) |
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341 | |
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342 | |
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343 | w = domain.quantities['stage'] |
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344 | uh = domain.quantities['xmomentum'] |
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345 | vh = domain.quantities['ymomentum'] |
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346 | h = domain.quantities['height'] |
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347 | z = domain.quantities['elevation'] |
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348 | u = domain.quantities['xvelocity'] |
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349 | v = domain.quantities['yvelocity'] |
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350 | |
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351 | val0 = 2.+2.0/3 |
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352 | val1 = 4.+4.0/3 |
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353 | val2 = 8.+2.0/3 |
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354 | val3 = 2.+8.0/3 |
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355 | |
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356 | zl = -3.75 # Assume constant bed (must be less than stage) |
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357 | domain.set_quantity('elevation', zl*num.ones((4, 3), num.int)) #array default# |
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358 | |
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359 | edgeflux = num.zeros(3, num.float) |
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360 | edgeflux0 = num.zeros(3, num.float) |
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361 | edgeflux1 = num.zeros(3, num.float) |
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362 | edgeflux2 = num.zeros(3, num.float) |
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363 | |
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364 | |
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365 | domain.set_quantity('stage', [[val0, val0-1, val0-2], |
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366 | [val1, val1+1, val1], |
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367 | [val2, val2-2, val2], |
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368 | [val3-0.5, val3, val3]]) |
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369 | |
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370 | domain.set_quantity('xmomentum', |
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371 | [[1,2,3], [3,4,5], [1,-1,0], [0,-2,2]]) |
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372 | |
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373 | domain.set_quantity('ymomentum', |
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374 | [[1,-1,0], [0,-3,2], [0,1,0], [-1,2,2]]) |
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375 | |
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376 | domain.check_integrity() |
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377 | domain.distribute_to_vertices_and_edges() |
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378 | |
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379 | # Flux across right edge of volume 1 |
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380 | normal = domain.get_normal(1, 0) |
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381 | ql = domain.get_evolved_quantities(vol_id=1, edge=0) |
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382 | qr = domain.get_evolved_quantities(vol_id=2, edge=2) |
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383 | max_speed = flux_function_c(normal, ql, qr, edgeflux0, g) |
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384 | |
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385 | #print max_speed, edgeflux0 |
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386 | assert num.allclose(edgeflux0, [-10.51926294, 577.81462335, -3.64772873], rtol=1.0e-2) |
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387 | |
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388 | # Flux across upper edge of volume 1 |
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389 | normal = domain.get_normal(1, 1) |
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390 | ql = domain.get_evolved_quantities(vol_id=1, edge=1) |
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391 | qr = domain.get_evolved_quantities(vol_id=3, edge=0) |
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392 | max_speed = flux_function_c(normal, ql, qr, edgeflux1, g) |
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393 | |
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394 | #print max_speed, edgeflux1 |
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395 | assert num.allclose(edgeflux1, [ 5.93945967, 19.14204647, 377.48851296], rtol=1.0e-2) |
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396 | |
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397 | # Flux across lower left hypotenuse of volume 1 |
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398 | normal = domain.get_normal(1, 2) |
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399 | ql = domain.get_evolved_quantities(vol_id=1, edge=2) |
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400 | qr = domain.get_evolved_quantities(vol_id=0, edge=1) |
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401 | max_speed = flux_function_c(normal, ql, qr, edgeflux2, g) |
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402 | |
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403 | #print max_speed, edgeflux2 |
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404 | assert num.allclose(edgeflux2, [17.21047971, -192.90578267, -203.05771337], rtol=1.0e-2) |
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405 | |
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406 | |
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407 | # Scale, add up and check that compute_fluxes is correct for vol 1 |
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408 | e0 = domain.edgelengths[1, 0] |
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409 | e1 = domain.edgelengths[1, 1] |
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410 | e2 = domain.edgelengths[1, 2] |
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411 | |
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412 | total_flux = -(e0*edgeflux0 + |
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413 | e1*edgeflux1 + |
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414 | e2*edgeflux2) / domain.areas[1] |
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415 | |
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416 | timestep = compute_fluxes_c(100.0,domain,w,uh,vh,h,z,u,v) |
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417 | |
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418 | assert num.allclose(timestep, 0.0438142267244, rtol=1.0e-2) |
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419 | |
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420 | for i, name in enumerate(['stage', 'xmomentum', 'ymomentum']): |
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421 | assert num.allclose(total_flux[i], |
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422 | domain.quantities[name].explicit_update[1]) |
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423 | |
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424 | |
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425 | |
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426 | def test_compute_fluxes4(self): |
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427 | #Random values, incl momentum |
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428 | a = [0.0, 0.0] |
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429 | b = [0.0, 2.0] |
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430 | c = [2.0, 0.0] |
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431 | d = [0.0, 4.0] |
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432 | e = [2.0, 2.0] |
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433 | f = [4.0, 0.0] |
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434 | |
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435 | points = [a, b, c, d, e, f] |
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436 | # bac, bce, ecf, dbe |
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437 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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438 | |
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439 | domain = Domain(points, vertices) |
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440 | domain.set_default_order(1) |
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441 | |
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442 | |
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443 | w = domain.quantities['stage'] |
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444 | uh = domain.quantities['xmomentum'] |
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445 | vh = domain.quantities['ymomentum'] |
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446 | h = domain.quantities['height'] |
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447 | z = domain.quantities['elevation'] |
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448 | u = domain.quantities['xvelocity'] |
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449 | v = domain.quantities['yvelocity'] |
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450 | |
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451 | val0 = 2.+2.0/3 |
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452 | val1 = 4.+4.0/3 |
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453 | val2 = 8.+2.0/3 |
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454 | val3 = 2.+8.0/3 |
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455 | |
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456 | zl = -3.75 # Assume constant bed (must be less than stage) |
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457 | domain.set_quantity('elevation', [0.0, -2.0, 0.0 ,0.0], location='centroids') |
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458 | |
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459 | edgeflux = num.zeros(3, num.float) |
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460 | edgeflux0 = num.zeros(3, num.float) |
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461 | edgeflux1 = num.zeros(3, num.float) |
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462 | edgeflux2 = num.zeros(3, num.float) |
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463 | |
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464 | |
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465 | domain.set_quantity('stage', -1.0) |
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466 | |
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467 | domain.set_quantity('xmomentum',0.0) |
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468 | |
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469 | domain.set_quantity('ymomentum',0.0) |
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470 | |
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471 | domain.check_integrity() |
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472 | domain.distribute_to_vertices_and_edges() |
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473 | |
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474 | |
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475 | #print w.edge_values |
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476 | #print u.edge_values |
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477 | #print v.edge_values |
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478 | #print h.edge_values |
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479 | #print z.edge_values |
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480 | |
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481 | |
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482 | domain.compute_fluxes() |
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483 | |
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484 | #for i, name in enumerate(['stage', 'xmomentum', 'ymomentum']): |
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485 | #print domain.quantities[name].explicit_update[1] |
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486 | #assert num.allclose(total_flux[i], |
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487 | # domain.quantities[name].explicit_update[1]) |
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488 | |
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489 | |
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490 | ################################################################################# |
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491 | |
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492 | if __name__ == "__main__": |
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493 | suite = unittest.makeSuite(Test_swb_domain_ext, 'test') |
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494 | runner = unittest.TextTestRunner(verbosity=1) |
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495 | runner.run(suite) |
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