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 | import tempfile |
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7 | |
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8 | from anuga.config import g, epsilon |
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9 | from anuga.config import netcdf_mode_r, netcdf_mode_w, netcdf_mode_a |
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10 | from anuga.utilities.numerical_tools import mean |
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11 | from anuga.utilities.polygon import is_inside_polygon |
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12 | from anuga.coordinate_transforms.geo_reference import Geo_reference |
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13 | from anuga.abstract_2d_finite_volumes.quantity import Quantity |
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14 | from anuga.geospatial_data.geospatial_data import Geospatial_data |
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15 | from anuga.abstract_2d_finite_volumes.mesh_factory import rectangular_cross |
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16 | |
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17 | from anuga.utilities.system_tools import get_pathname_from_package |
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18 | from swb_domain import * |
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19 | |
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20 | import numpy as num |
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21 | |
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22 | # Get gateway to C implementation of flux function for direct testing |
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23 | from shallow_water_ext import flux_function_central as flux_function |
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24 | |
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25 | |
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26 | |
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27 | |
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28 | class Test_swb_clean(unittest.TestCase): |
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29 | def setUp(self): |
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30 | pass |
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31 | |
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32 | def tearDown(self): |
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33 | pass |
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34 | |
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35 | def test_compute_fluxes0(self): |
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36 | # Do a full triangle and check that fluxes cancel out for |
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37 | # the constant stage case |
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38 | |
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39 | a = [0.0, 0.0] |
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40 | b = [0.0, 2.0] |
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41 | c = [2.0, 0.0] |
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42 | d = [0.0, 4.0] |
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43 | e = [2.0, 2.0] |
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44 | f = [4.0, 0.0] |
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45 | |
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46 | points = [a, b, c, d, e, f] |
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47 | # bac, bce, ecf, dbe |
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48 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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49 | |
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50 | domain = Domain(points, vertices) |
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51 | domain.set_quantity('stage', [[2,2,2], [2,2,2], [2,2,2], [2,2,2]]) |
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52 | domain.check_integrity() |
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53 | |
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54 | assert num.allclose(domain.neighbours, |
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55 | [[-1,1,-1], [2,3,0], [-1,-1,1],[1,-1,-1]]) |
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56 | assert num.allclose(domain.neighbour_edges, |
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57 | [[-1,2,-1], [2,0,1], [-1,-1,0],[1,-1,-1]]) |
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58 | |
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59 | zl = zr = 0. # Assume flat bed |
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60 | |
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61 | edgeflux = num.zeros(3, num.float) |
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62 | edgeflux0 = num.zeros(3, num.float) |
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63 | edgeflux1 = num.zeros(3, num.float) |
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64 | edgeflux2 = num.zeros(3, num.float) |
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65 | H0 = 0.0 |
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66 | |
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67 | # Flux across right edge of volume 1 |
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68 | normal = domain.get_normal(1, 0) |
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69 | ql = domain.get_conserved_quantities(vol_id=1, edge=0) |
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70 | qr = domain.get_conserved_quantities(vol_id=2, edge=2) |
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71 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux0, |
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72 | epsilon, g, H0) |
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73 | |
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74 | # Check that flux seen from other triangles is inverse |
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75 | (ql, qr) = (qr, ql) |
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76 | normal = domain.get_normal(2, 2) |
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77 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux, |
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78 | epsilon, g, H0) |
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79 | |
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80 | assert num.allclose(edgeflux0 + edgeflux, 0.) |
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81 | |
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82 | # Flux across upper edge of volume 1 |
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83 | normal = domain.get_normal(1, 1) |
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84 | ql = domain.get_conserved_quantities(vol_id=1, edge=1) |
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85 | qr = domain.get_conserved_quantities(vol_id=3, edge=0) |
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86 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux1, |
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87 | epsilon, g, H0) |
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88 | |
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89 | # Check that flux seen from other triangles is inverse |
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90 | (ql, qr) = (qr, ql) |
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91 | normal = domain.get_normal(3, 0) |
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92 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux, |
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93 | epsilon, g, H0) |
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94 | |
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95 | assert num.allclose(edgeflux1 + edgeflux, 0.) |
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96 | |
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97 | # Flux across lower left hypotenuse of volume 1 |
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98 | normal = domain.get_normal(1, 2) |
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99 | ql = domain.get_conserved_quantities(vol_id=1, edge=2) |
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100 | qr = domain.get_conserved_quantities(vol_id=0, edge=1) |
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101 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux2, |
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102 | epsilon, g, H0) |
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103 | |
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104 | # Check that flux seen from other triangles is inverse |
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105 | (ql, qr) = (qr, ql) |
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106 | normal = domain.get_normal(0, 1) |
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107 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux, |
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108 | epsilon, g, H0) |
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109 | assert num.allclose(edgeflux2 + edgeflux, 0.) |
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110 | |
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111 | # Scale by edgelengths, add up anc check that total flux is zero |
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112 | e0 = domain.edgelengths[1, 0] |
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113 | e1 = domain.edgelengths[1, 1] |
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114 | e2 = domain.edgelengths[1, 2] |
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115 | |
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116 | assert num.allclose(e0*edgeflux0 + e1*edgeflux1 + e2*edgeflux2, 0.) |
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117 | |
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118 | # Now check that compute_flux yields zeros as well |
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119 | domain.compute_fluxes() |
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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) |
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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 | |
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147 | zl = zr = 0. # Assume flat bed |
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148 | |
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149 | edgeflux = num.zeros(3, num.float) |
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150 | edgeflux0 = num.zeros(3, num.float) |
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151 | edgeflux1 = num.zeros(3, num.float) |
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152 | edgeflux2 = num.zeros(3, num.float) |
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153 | H0 = 0.0 |
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154 | |
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155 | # Flux across right edge of volume 1 |
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156 | normal = domain.get_normal(1, 0) # Get normal 0 of triangle 1 |
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157 | assert num.allclose(normal, [1, 0]) |
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158 | |
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159 | ql = domain.get_conserved_quantities(vol_id=1, edge=0) |
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160 | assert num.allclose(ql, [val1, 0, 0]) |
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161 | |
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162 | qr = domain.get_conserved_quantities(vol_id=2, edge=2) |
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163 | assert num.allclose(qr, [val2, 0, 0]) |
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164 | |
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165 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux0, |
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166 | epsilon, g, H0) |
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167 | |
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168 | # Flux across edge in the east direction (as per normal vector) |
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169 | assert num.allclose(edgeflux0, [-15.3598804, 253.71111111, 0.]) |
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170 | assert num.allclose(max_speed, 9.21592824046) |
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171 | |
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172 | #Flux across edge in the west direction (opposite sign for xmomentum) |
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173 | normal_opposite = domain.get_normal(2, 2) # Get normal 2 of triangle 2 |
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174 | assert num.allclose(normal_opposite, [-1, 0]) |
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175 | |
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176 | max_speed = flux_function(normal_opposite, ql, qr, zl, zr, edgeflux, |
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177 | epsilon, g, H0) |
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178 | assert num.allclose(edgeflux, [-15.3598804, -253.71111111, 0.]) |
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179 | |
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180 | #Flux across upper edge of volume 1 |
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181 | normal = domain.get_normal(1, 1) |
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182 | ql = domain.get_conserved_quantities(vol_id=1, edge=1) |
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183 | qr = domain.get_conserved_quantities(vol_id=3, edge=0) |
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184 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux1, |
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185 | epsilon, g, H0) |
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186 | |
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187 | assert num.allclose(edgeflux1, [2.4098563, 0., 123.04444444]) |
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188 | assert num.allclose(max_speed, 7.22956891292) |
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189 | |
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190 | #Flux across lower left hypotenuse of volume 1 |
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191 | normal = domain.get_normal(1, 2) |
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192 | ql = domain.get_conserved_quantities(vol_id=1, edge=2) |
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193 | qr = domain.get_conserved_quantities(vol_id=0, edge=1) |
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194 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux2, |
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195 | epsilon, g, H0) |
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196 | |
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197 | assert num.allclose(edgeflux2, [9.63942522, -61.59685738, -61.59685738]) |
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198 | assert num.allclose(max_speed, 7.22956891292) |
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199 | |
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200 | #Scale, add up and check that compute_fluxes is correct for vol 1 |
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201 | e0 = domain.edgelengths[1, 0] |
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202 | e1 = domain.edgelengths[1, 1] |
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203 | e2 = domain.edgelengths[1, 2] |
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204 | |
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205 | total_flux = -(e0*edgeflux0 + |
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206 | e1*edgeflux1 + |
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207 | e2*edgeflux2) / domain.areas[1] |
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208 | |
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209 | assert num.allclose(total_flux, [-0.68218178, -166.6, -35.93333333]) |
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210 | |
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211 | domain.compute_fluxes() |
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212 | |
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213 | for i, name in enumerate(['stage', 'xmomentum', 'ymomentum']): |
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214 | assert num.allclose(total_flux[i], |
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215 | domain.quantities[name].explicit_update[1]) |
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216 | |
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217 | assert num.allclose(domain.quantities['stage'].explicit_update, |
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218 | [0., -0.68218178, -111.77316251, -35.68522449]) |
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219 | assert num.allclose(domain.quantities['xmomentum'].explicit_update, |
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220 | [-69.68888889, -166.6, 69.68888889, 0]) |
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221 | assert num.allclose(domain.quantities['ymomentum'].explicit_update, |
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222 | [-69.68888889, -35.93333333, 0., 69.68888889]) |
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223 | |
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224 | def test_compute_fluxes2(self): |
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225 | #Random values, incl momentum |
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226 | a = [0.0, 0.0] |
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227 | b = [0.0, 2.0] |
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228 | c = [2.0, 0.0] |
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229 | d = [0.0, 4.0] |
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230 | e = [2.0, 2.0] |
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231 | f = [4.0, 0.0] |
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232 | |
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233 | points = [a, b, c, d, e, f] |
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234 | # bac, bce, ecf, dbe |
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235 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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236 | |
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237 | domain = Domain(points, vertices) |
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238 | val0 = 2. + 2.0/3 |
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239 | val1 = 4. + 4.0/3 |
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240 | val2 = 8. + 2.0/3 |
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241 | val3 = 2. + 8.0/3 |
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242 | |
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243 | zl = zr = 0 # Assume flat zero bed |
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244 | edgeflux = num.zeros(3, num.float) |
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245 | edgeflux0 = num.zeros(3, num.float) |
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246 | edgeflux1 = num.zeros(3, num.float) |
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247 | edgeflux2 = num.zeros(3, num.float) |
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248 | H0 = 0.0 |
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249 | |
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250 | domain.set_quantity('elevation', zl*num.ones((4, 3), num.int)) #array default# |
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251 | |
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252 | domain.set_quantity('stage', [[val0, val0-1, val0-2], |
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253 | [val1, val1+1, val1], |
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254 | [val2, val2-2, val2], |
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255 | [val3-0.5, val3, val3]]) |
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256 | |
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257 | domain.set_quantity('xmomentum', |
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258 | [[1,2,3], [3,4,5], [1,-1,0], [0,-2,2]]) |
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259 | |
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260 | domain.set_quantity('ymomentum', |
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261 | [[1,-1,0], [0,-3,2], [0,1,0], [-1,2,2]]) |
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262 | |
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263 | domain.check_integrity() |
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264 | |
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265 | # Flux across right edge of volume 1 |
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266 | normal = domain.get_normal(1, 0) |
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267 | ql = domain.get_conserved_quantities(vol_id=1, edge=0) |
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268 | qr = domain.get_conserved_quantities(vol_id=2, edge=2) |
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269 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux0, |
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270 | epsilon, g, H0) |
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271 | |
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272 | # Flux across upper edge of volume 1 |
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273 | normal = domain.get_normal(1, 1) |
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274 | ql = domain.get_conserved_quantities(vol_id=1, edge=1) |
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275 | qr = domain.get_conserved_quantities(vol_id=3, edge=0) |
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276 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux1, |
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277 | epsilon, g, H0) |
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278 | |
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279 | # Flux across lower left hypotenuse of volume 1 |
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280 | normal = domain.get_normal(1, 2) |
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281 | ql = domain.get_conserved_quantities(vol_id=1, edge=2) |
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282 | qr = domain.get_conserved_quantities(vol_id=0, edge=1) |
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283 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux2, |
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284 | epsilon, g, H0) |
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285 | |
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286 | # Scale, add up and check that compute_fluxes is correct for vol 1 |
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287 | e0 = domain.edgelengths[1, 0] |
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288 | e1 = domain.edgelengths[1, 1] |
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289 | e2 = domain.edgelengths[1, 2] |
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290 | |
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291 | total_flux = -(e0*edgeflux0 + |
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292 | e1*edgeflux1 + |
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293 | e2*edgeflux2) / domain.areas[1] |
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294 | |
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295 | domain.compute_fluxes() |
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296 | |
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297 | for i, name in enumerate(['stage', 'xmomentum', 'ymomentum']): |
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298 | assert num.allclose(total_flux[i], |
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299 | domain.quantities[name].explicit_update[1]) |
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300 | |
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301 | # FIXME (Ole): Need test like this for fluxes in very shallow water. |
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302 | def test_compute_fluxes3(self): |
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303 | #Random values, incl momentum |
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304 | a = [0.0, 0.0] |
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305 | b = [0.0, 2.0] |
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306 | c = [2.0, 0.0] |
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307 | d = [0.0, 4.0] |
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308 | e = [2.0, 2.0] |
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309 | f = [4.0, 0.0] |
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310 | |
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311 | points = [a, b, c, d, e, f] |
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312 | # bac, bce, ecf, dbe |
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313 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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314 | |
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315 | domain = Domain(points, vertices) |
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316 | |
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317 | val0 = 2.+2.0/3 |
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318 | val1 = 4.+4.0/3 |
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319 | val2 = 8.+2.0/3 |
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320 | val3 = 2.+8.0/3 |
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321 | |
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322 | zl = zr = -3.75 # Assume constant bed (must be less than stage) |
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323 | domain.set_quantity('elevation', zl*num.ones((4, 3), num.int)) #array default# |
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324 | |
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325 | edgeflux = num.zeros(3, num.float) |
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326 | edgeflux0 = num.zeros(3, num.float) |
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327 | edgeflux1 = num.zeros(3, num.float) |
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328 | edgeflux2 = num.zeros(3, num.float) |
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329 | H0 = 0.0 |
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330 | |
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331 | domain.set_quantity('stage', [[val0, val0-1, val0-2], |
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332 | [val1, val1+1, val1], |
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333 | [val2, val2-2, val2], |
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334 | [val3-0.5, val3, val3]]) |
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335 | |
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336 | domain.set_quantity('xmomentum', |
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337 | [[1,2,3], [3,4,5], [1,-1,0], [0,-2,2]]) |
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338 | |
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339 | domain.set_quantity('ymomentum', |
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340 | [[1,-1,0], [0,-3,2], [0,1,0], [-1,2,2]]) |
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341 | |
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342 | domain.check_integrity() |
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343 | |
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344 | # Flux across right edge of volume 1 |
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345 | normal = domain.get_normal(1, 0) |
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346 | ql = domain.get_conserved_quantities(vol_id=1, edge=0) |
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347 | qr = domain.get_conserved_quantities(vol_id=2, edge=2) |
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348 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux0, |
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349 | epsilon, g, H0) |
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350 | |
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351 | # Flux across upper edge of volume 1 |
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352 | normal = domain.get_normal(1, 1) |
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353 | ql = domain.get_conserved_quantities(vol_id=1, edge=1) |
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354 | qr = domain.get_conserved_quantities(vol_id=3, edge=0) |
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355 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux1, |
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356 | epsilon, g, H0) |
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357 | |
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358 | # Flux across lower left hypotenuse of volume 1 |
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359 | normal = domain.get_normal(1, 2) |
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360 | ql = domain.get_conserved_quantities(vol_id=1, edge=2) |
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361 | qr = domain.get_conserved_quantities(vol_id=0, edge=1) |
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362 | max_speed = flux_function(normal, ql, qr, zl, zr, edgeflux2, |
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363 | epsilon, g, H0) |
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364 | |
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365 | # Scale, add up and check that compute_fluxes is correct for vol 1 |
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366 | e0 = domain.edgelengths[1, 0] |
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367 | e1 = domain.edgelengths[1, 1] |
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368 | e2 = domain.edgelengths[1, 2] |
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369 | |
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370 | total_flux = -(e0*edgeflux0 + |
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371 | e1*edgeflux1 + |
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372 | e2*edgeflux2) / domain.areas[1] |
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373 | |
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374 | domain.compute_fluxes() |
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375 | |
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376 | for i, name in enumerate(['stage', 'xmomentum', 'ymomentum']): |
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377 | assert num.allclose(total_flux[i], |
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378 | domain.quantities[name].explicit_update[1]) |
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379 | |
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380 | def test_flux_optimisation(self): |
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381 | """test_flux_optimisation |
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382 | |
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383 | Test that fluxes are correctly computed using |
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384 | dry and still cell exclusions |
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385 | """ |
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386 | |
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387 | from anuga.config import g |
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388 | import copy |
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389 | |
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390 | a = [0.0, 0.0] |
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391 | b = [0.0, 2.0] |
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392 | c = [2.0, 0.0] |
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393 | d = [0.0, 4.0] |
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394 | e = [2.0, 2.0] |
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395 | f = [4.0, 0.0] |
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396 | |
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397 | points = [a, b, c, d, e, f] |
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398 | # bac, bce, ecf, dbe |
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399 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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400 | |
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401 | domain = Domain(points, vertices) |
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402 | |
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403 | #Set up for a gradient of (3,0) at mid triangle (bce) |
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404 | def slope(x, y): |
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405 | return 3*x |
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406 | |
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407 | h = 0.1 |
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408 | def stage(x, y): |
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409 | return slope(x, y) + h |
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410 | |
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411 | domain.set_quantity('elevation', slope) |
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412 | domain.set_quantity('stage', stage) |
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413 | |
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414 | # Allow slope limiters to work |
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415 | # (FIXME (Ole): Shouldn't this be automatic in ANUGA?) |
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416 | domain.distribute_to_vertices_and_edges() |
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417 | |
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418 | initial_stage = copy.copy(domain.quantities['stage'].vertex_values) |
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419 | |
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420 | domain.set_boundary({'exterior': Reflective_boundary(domain)}) |
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421 | |
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422 | # Check that update arrays are initialised to zero |
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423 | assert num.allclose(domain.get_quantity('stage').explicit_update, 0) |
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424 | assert num.allclose(domain.get_quantity('xmomentum').explicit_update, 0) |
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425 | assert num.allclose(domain.get_quantity('ymomentum').explicit_update, 0) |
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426 | |
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427 | # Get true values |
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428 | domain.optimise_dry_cells = False |
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429 | domain.compute_fluxes() |
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430 | stage_ref = copy.copy(domain.get_quantity('stage').explicit_update) |
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431 | xmom_ref = copy.copy(domain.get_quantity('xmomentum').explicit_update) |
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432 | ymom_ref = copy.copy(domain.get_quantity('ymomentum').explicit_update) |
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433 | |
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434 | # Try with flux optimisation |
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435 | domain.optimise_dry_cells = True |
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436 | domain.compute_fluxes() |
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437 | |
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438 | assert num.allclose(stage_ref, |
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439 | domain.get_quantity('stage').explicit_update) |
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440 | assert num.allclose(xmom_ref, |
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441 | domain.get_quantity('xmomentum').explicit_update) |
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442 | assert num.allclose(ymom_ref, |
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443 | domain.get_quantity('ymomentum').explicit_update) |
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444 | |
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445 | |
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446 | ################################################################################# |
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447 | |
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448 | if __name__ == "__main__": |
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449 | suite = unittest.makeSuite(Test_swb_clean, 'test') |
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450 | runner = unittest.TextTestRunner(verbosity=1) |
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451 | runner.run(suite) |
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