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_conservation(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 | |
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36 | def test_conservation_1(self): |
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37 | """Test that stage is conserved globally |
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38 | |
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39 | This one uses a flat bed, reflective bdries and a suitable |
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40 | initial condition |
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41 | """ |
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42 | |
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43 | from mesh_factory import rectangular |
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44 | |
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45 | # Create basic mesh |
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46 | points, vertices, boundary = rectangular(6, 6) |
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47 | |
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48 | # Create shallow water domain |
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49 | domain = Domain(points, vertices, boundary) |
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50 | domain.smooth = False |
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51 | domain.default_order = 2 |
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52 | |
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53 | # IC |
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54 | def x_slope(x, y): |
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55 | return x/3 |
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56 | |
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57 | domain.set_quantity('elevation', 0) |
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58 | domain.set_quantity('friction', 0) |
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59 | domain.set_quantity('stage', x_slope) |
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60 | |
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61 | # Boundary conditions (reflective everywhere) |
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62 | Br = Reflective_boundary(domain) |
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63 | domain.set_boundary({'left': Br, 'right': Br, 'top': Br, 'bottom': Br}) |
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64 | |
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65 | domain.check_integrity() |
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66 | |
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67 | initial_volume = domain.quantities['stage'].get_integral() |
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68 | initial_xmom = domain.quantities['xmomentum'].get_integral() |
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69 | |
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70 | # Evolution |
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71 | for t in domain.evolve(yieldstep=0.05, finaltime=5.0): |
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72 | volume = domain.quantities['stage'].get_integral() |
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73 | assert num.allclose(volume, initial_volume) |
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74 | |
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75 | #I don't believe that the total momentum should be the same |
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76 | #It starts with zero and ends with zero though |
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77 | #xmom = domain.quantities['xmomentum'].get_integral() |
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78 | #print xmom |
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79 | #assert allclose (xmom, initial_xmom) |
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80 | |
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81 | os.remove(domain.get_name() + '.sww') |
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82 | |
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83 | def test_conservation_2(self): |
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84 | """Test that stage is conserved globally |
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85 | |
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86 | This one uses a slopy bed, reflective bdries and a suitable |
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87 | initial condition |
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88 | """ |
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89 | |
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90 | from mesh_factory import rectangular |
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91 | |
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92 | # Create basic mesh |
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93 | points, vertices, boundary = rectangular(6, 6) |
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94 | |
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95 | # Create shallow water domain |
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96 | domain = Domain(points, vertices, boundary) |
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97 | domain.smooth = False |
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98 | domain.default_order = 2 |
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99 | |
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100 | # IC |
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101 | def x_slope(x, y): |
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102 | return x/3 |
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103 | |
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104 | domain.set_quantity('elevation', x_slope) |
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105 | domain.set_quantity('friction', 0) |
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106 | domain.set_quantity('stage', 0.4) # Steady |
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107 | |
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108 | # Boundary conditions (reflective everywhere) |
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109 | Br = Reflective_boundary(domain) |
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110 | domain.set_boundary({'left': Br, 'right': Br, 'top': Br, 'bottom': Br}) |
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111 | |
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112 | domain.check_integrity() |
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113 | |
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114 | initial_volume = domain.quantities['stage'].get_integral() |
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115 | initial_xmom = domain.quantities['xmomentum'].get_integral() |
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116 | |
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117 | # Evolution |
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118 | for t in domain.evolve(yieldstep=0.05, finaltime=5.0): |
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119 | volume = domain.quantities['stage'].get_integral() |
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120 | assert num.allclose(volume, initial_volume) |
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121 | |
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122 | #FIXME: What would we expect from momentum |
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123 | #xmom = domain.quantities['xmomentum'].get_integral() |
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124 | #print xmom |
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125 | #assert allclose (xmom, initial_xmom) |
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126 | |
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127 | os.remove(domain.get_name() + '.sww') |
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128 | |
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129 | def test_conservation_3(self): |
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130 | """Test that stage is conserved globally |
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131 | |
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132 | This one uses a larger grid, convoluted bed, reflective boundaries |
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133 | and a suitable initial condition |
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134 | """ |
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135 | |
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136 | from mesh_factory import rectangular |
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137 | |
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138 | # Create basic mesh |
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139 | points, vertices, boundary = rectangular(2, 1) |
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140 | |
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141 | # Create shallow water domain |
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142 | domain = Domain(points, vertices, boundary) |
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143 | domain.smooth = False |
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144 | |
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145 | |
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146 | # IC |
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147 | def x_slope(x, y): |
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148 | z = 0*x |
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149 | for i in range(len(x)): |
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150 | if x[i] < 0.3: |
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151 | z[i] = x[i]/3 |
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152 | if 0.3 <= x[i] < 0.5: |
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153 | z[i] = -0.5 |
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154 | if 0.5 <= x[i] < 0.7: |
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155 | z[i] = 0.39 |
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156 | if 0.7 <= x[i]: |
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157 | z[i] = x[i]/3 |
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158 | return z |
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159 | |
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160 | domain.set_quantity('elevation', x_slope) |
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161 | domain.set_quantity('friction', 0) |
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162 | domain.set_quantity('stage', 0.4) #Steady |
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163 | |
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164 | # Boundary conditions (reflective everywhere) |
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165 | Br = Reflective_boundary(domain) |
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166 | domain.set_boundary({'left': Br, 'right': Br, 'top': Br, 'bottom': Br}) |
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167 | |
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168 | domain.check_integrity() |
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169 | |
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170 | initial_volume = domain.quantities['stage'].get_integral() |
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171 | initial_xmom = domain.quantities['xmomentum'].get_integral() |
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172 | |
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173 | import copy |
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174 | |
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175 | ref_centroid_values = copy.copy(domain.quantities['stage'].\ |
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176 | centroid_values) |
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177 | |
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178 | domain.distribute_to_vertices_and_edges() |
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179 | |
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180 | assert num.allclose(domain.quantities['stage'].centroid_values, |
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181 | ref_centroid_values) |
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182 | |
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183 | # Check that initial limiter doesn't violate cons quan |
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184 | assert num.allclose(domain.quantities['stage'].get_integral(), |
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185 | initial_volume) |
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186 | |
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187 | # Evolution |
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188 | for t in domain.evolve(yieldstep=0.05, finaltime=10): |
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189 | volume = domain.quantities['stage'].get_integral() |
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190 | |
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191 | assert num.allclose (volume, initial_volume) |
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192 | |
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193 | os.remove(domain.get_name() + '.sww') |
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194 | |
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195 | def test_conservation_4(self): |
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196 | """Test that stage is conserved globally |
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197 | |
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198 | This one uses a larger grid, convoluted bed, reflective boundaries |
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199 | and a suitable initial condition |
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200 | """ |
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201 | |
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202 | from mesh_factory import rectangular |
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203 | |
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204 | # Create basic mesh |
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205 | points, vertices, boundary = rectangular(6, 6) |
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206 | |
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207 | # Create shallow water domain |
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208 | domain = Domain(points, vertices, boundary) |
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209 | domain.smooth = False |
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210 | domain.default_order = 2 |
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211 | |
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212 | # IC |
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213 | def x_slope(x, y): |
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214 | z = 0*x |
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215 | for i in range(len(x)): |
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216 | if x[i] < 0.3: |
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217 | z[i] = x[i]/3 |
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218 | if 0.3 <= x[i] < 0.5: |
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219 | z[i] = -0.5 |
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220 | if 0.5 <= x[i] < 0.7: |
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221 | #z[i] = 0.3 # OK with beta == 0.2 |
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222 | z[i] = 0.34 # OK with beta == 0.0 |
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223 | #z[i] = 0.35 # Fails after 80 timesteps with an error |
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224 | # of the order 1.0e-5 |
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225 | if 0.7 <= x[i]: |
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226 | z[i] = x[i]/3 |
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227 | return z |
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228 | |
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229 | domain.set_quantity('elevation', x_slope) |
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230 | domain.set_quantity('friction', 0) |
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231 | domain.set_quantity('stage', 0.4) #Steady |
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232 | |
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233 | # Boundary conditions (reflective everywhere) |
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234 | Br = Reflective_boundary(domain) |
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235 | domain.set_boundary({'left': Br, 'right': Br, 'top': Br, 'bottom': Br}) |
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236 | |
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237 | domain.check_integrity() |
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238 | |
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239 | |
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240 | initial_volume = domain.quantities['stage'].get_integral() |
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241 | initial_xmom = domain.quantities['xmomentum'].get_integral() |
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242 | |
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243 | import copy |
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244 | |
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245 | ref_centroid_values = copy.copy(domain.quantities['stage'].\ |
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246 | centroid_values) |
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247 | |
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248 | # Test limiter by itself |
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249 | domain.distribute_to_vertices_and_edges() |
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250 | |
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251 | # Check that initial limiter doesn't violate cons quan |
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252 | assert num.allclose(domain.quantities['stage'].get_integral(), |
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253 | initial_volume) |
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254 | # NOTE: This would fail if any initial stage was less than the |
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255 | # corresponding bed elevation - but that is reasonable. |
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256 | |
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257 | #Evolution |
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258 | #print domain.get_time(), initial_volume |
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259 | for t in domain.evolve(yieldstep=0.05, finaltime=10.0): |
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260 | volume = domain.quantities['stage'].get_integral() |
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261 | |
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262 | #print domain.get_time(), volume |
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263 | assert num.allclose (volume, initial_volume) |
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264 | |
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265 | os.remove(domain.get_name() + '.sww') |
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266 | |
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267 | def test_conservation_5(self): |
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268 | """Test that momentum is conserved globally in steady state scenario |
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269 | |
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270 | This one uses a slopy bed, dirichlet and reflective bdries |
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271 | """ |
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272 | |
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273 | from mesh_factory import rectangular |
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274 | |
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275 | # Create basic mesh |
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276 | points, vertices, boundary = rectangular(6, 6) |
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277 | |
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278 | # Create shallow water domain |
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279 | domain = Domain(points, vertices, boundary) |
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280 | domain.smooth = False |
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281 | domain.default_order = 2 |
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282 | |
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283 | # IC |
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284 | def x_slope(x, y): |
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285 | return x/3 |
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286 | |
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287 | domain.set_quantity('elevation', x_slope) |
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288 | domain.set_quantity('friction', 0) |
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289 | domain.set_quantity('stage', 0.4) # Steady |
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290 | |
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291 | # Boundary conditions (reflective everywhere) |
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292 | Br = Reflective_boundary(domain) |
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293 | Bleft = Dirichlet_boundary([0.5, 0, 0]) |
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294 | Bright = Dirichlet_boundary([0.1, 0, 0]) |
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295 | domain.set_boundary({'left': Bleft, 'right': Bright, |
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296 | 'top': Br, 'bottom': Br}) |
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297 | |
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298 | domain.check_integrity() |
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299 | |
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300 | initial_volume = domain.quantities['stage'].get_integral() |
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301 | initial_xmom = domain.quantities['xmomentum'].get_integral() |
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302 | |
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303 | # Evolution |
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304 | for t in domain.evolve(yieldstep=0.05, finaltime=15.0): |
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305 | stage = domain.quantities['stage'].get_integral() |
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306 | xmom = domain.quantities['xmomentum'].get_integral() |
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307 | ymom = domain.quantities['ymomentum'].get_integral() |
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308 | |
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309 | if num.allclose(t, 10): # Steady state reached |
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310 | steady_xmom = domain.quantities['xmomentum'].get_integral() |
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311 | steady_ymom = domain.quantities['ymomentum'].get_integral() |
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312 | steady_stage = domain.quantities['stage'].get_integral() |
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313 | |
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314 | if t > 10: |
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315 | msg = 'time=%.2f, xmom=%.10f, steady_xmom=%.10f' % (t, xmom, steady_xmom) |
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316 | assert num.allclose(xmom, steady_xmom,atol=1.0e-4), msg |
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317 | |
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318 | msg = 'time=%.2f, ymom=%.10f, steady_ymom=%.10f' % (t, ymom, steady_ymom) |
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319 | assert num.allclose(ymom, steady_ymom,atol=1.0e-4), msg |
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320 | |
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321 | msg = 'time=%.2f, stage=%.10f, steady_stage=%.10f' % (t, stage, steady_stage) |
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322 | assert num.allclose(stage, steady_stage,atol=1.0e-4) |
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323 | |
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324 | os.remove(domain.get_name() + '.sww') |
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325 | |
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326 | def test_conservation_real(self): |
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327 | """Test that momentum is conserved globally |
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328 | |
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329 | Stephen finally made a test that revealed the problem. |
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330 | This test failed with code prior to 25 July 2005 |
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331 | """ |
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332 | |
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333 | import sys |
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334 | import os.path |
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335 | sys.path.append(os.path.join('..', 'abstract_2d_finite_volumes')) |
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336 | from mesh_factory import rectangular |
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337 | |
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338 | yieldstep = 0.01 |
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339 | finaltime = 0.05 |
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340 | min_depth = 1.0e-2 |
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341 | |
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342 | #Create shallow water domain |
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343 | points, vertices, boundary = rectangular(10, 10, len1=500, len2=500) |
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344 | domain = Domain(points, vertices, boundary) |
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345 | domain.smooth = False |
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346 | domain.default_order = 1 |
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347 | domain.minimum_allowed_height = min_depth |
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348 | |
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349 | # Set initial condition |
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350 | class Set_IC: |
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351 | """Set an initial condition with a constant value, for x0<x<x1""" |
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352 | |
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353 | def __init__(self, x0=0.25, x1=0.5, h=1.0): |
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354 | self.x0 = x0 |
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355 | self.x1 = x1 |
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356 | self.h = h |
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357 | |
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358 | def __call__(self, x, y): |
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359 | return self.h*((x > self.x0) & (x < self.x1)) |
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360 | |
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361 | domain.set_quantity('stage', Set_IC(200.0, 300.0, 5.0)) |
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362 | |
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363 | # Boundaries |
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364 | R = Reflective_boundary(domain) |
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365 | domain.set_boundary({'left': R, 'right': R, 'top':R, 'bottom': R}) |
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366 | |
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367 | ref = domain.quantities['stage'].get_integral() |
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368 | |
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369 | # Evolution |
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370 | for t in domain.evolve(yieldstep=yieldstep, finaltime=finaltime): |
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371 | pass |
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372 | |
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373 | now = domain.quantities['stage'].get_integral() |
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374 | |
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375 | msg = 'Stage not conserved: was %f, now %f' % (ref, now) |
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376 | assert num.allclose(ref, now), msg |
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377 | |
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378 | os.remove(domain.get_name() + '.sww') |
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379 | |
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380 | |
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381 | def test_total_volume(self): |
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382 | """test_total_volume |
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383 | |
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384 | Test that total volume can be computed correctly |
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385 | """ |
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386 | |
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387 | #---------------------------------------------------------------------- |
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388 | # Import necessary modules |
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389 | #---------------------------------------------------------------------- |
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390 | from anuga.abstract_2d_finite_volumes.mesh_factory \ |
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391 | import rectangular_cross |
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392 | from anuga.shallow_water import Domain |
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393 | |
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394 | #---------------------------------------------------------------------- |
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395 | # Setup computational domain |
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396 | #---------------------------------------------------------------------- |
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397 | |
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398 | length = 100. |
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399 | width = 20. |
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400 | dx = dy = 5 # Resolution: of grid on both axes |
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401 | |
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402 | points, vertices, boundary = rectangular_cross(int(length/dx), |
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403 | int(width/dy), |
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404 | len1=length, |
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405 | len2=width) |
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406 | domain = Domain(points, vertices, boundary) |
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407 | |
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408 | #---------------------------------------------------------------------- |
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409 | # Simple flat bottom bathtub |
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410 | #---------------------------------------------------------------------- |
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411 | |
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412 | d = 1.0 |
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413 | domain.set_quantity('elevation', 0.0) |
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414 | domain.set_quantity('stage', d) |
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415 | |
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416 | assert num.allclose(domain.compute_total_volume(), length*width*d) |
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417 | |
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418 | #---------------------------------------------------------------------- |
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419 | # Slope |
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420 | #---------------------------------------------------------------------- |
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421 | |
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422 | slope = 1.0/10 # RHS drops to -10m |
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423 | def topography(x, y): |
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424 | return -x * slope |
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425 | |
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426 | domain.set_quantity('elevation', topography) |
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427 | domain.set_quantity('stage', 0.0) # Domain full |
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428 | |
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429 | V = domain.compute_total_volume() |
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430 | assert num.allclose(V, length*width*10/2) |
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431 | |
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432 | domain.set_quantity('stage', -5.0) # Domain 'half' full |
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433 | |
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434 | # IMPORTANT: Adjust stage to match elevation |
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435 | domain.distribute_to_vertices_and_edges() |
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436 | |
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437 | V = domain.compute_total_volume() |
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438 | assert num.allclose(V, width*(length/2)*5.0/2) |
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439 | |
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440 | |
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441 | def test_volumetric_balance_computation(self): |
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442 | """test_volumetric_balance_computation |
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443 | |
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444 | Test that total in and out flows are computed correctly |
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445 | in a steady state situation |
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446 | """ |
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447 | |
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448 | # Set to True if volumetric output is sought |
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449 | verbose = False |
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450 | |
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451 | #---------------------------------------------------------------------- |
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452 | # Import necessary modules |
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453 | #---------------------------------------------------------------------- |
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454 | |
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455 | from anuga.abstract_2d_finite_volumes.mesh_factory \ |
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456 | import rectangular_cross |
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457 | from anuga.shallow_water import Domain |
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458 | from anuga.shallow_water.shallow_water_domain import Reflective_boundary |
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459 | from anuga.shallow_water.shallow_water_domain import Dirichlet_boundary |
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460 | from anuga.shallow_water.shallow_water_domain import Inflow |
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461 | from anuga.shallow_water.data_manager \ |
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462 | import get_flow_through_cross_section |
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463 | |
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464 | #---------------------------------------------------------------------- |
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465 | # Setup computational domain |
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466 | #---------------------------------------------------------------------- |
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467 | |
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468 | finaltime = 500.0 |
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469 | length = 300. |
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470 | width = 20. |
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471 | dx = dy = 5 # Resolution: of grid on both axes |
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472 | |
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473 | # Input parameters |
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474 | uh = 1.0 |
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475 | vh = 0.0 |
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476 | d = 1.0 |
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477 | |
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478 | # 20 m^3/s in the x direction across entire domain |
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479 | ref_flow = uh*d*width |
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480 | |
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481 | points, vertices, boundary = rectangular_cross(int(length/dx), |
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482 | int(width/dy), |
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483 | len1=length, |
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484 | len2=width) |
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485 | |
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486 | domain = Domain(points, vertices, boundary) |
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487 | domain.set_name('Inflow_flowline_test') # Output name |
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488 | |
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489 | #---------------------------------------------------------------------- |
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490 | # Setup initial conditions |
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491 | #---------------------------------------------------------------------- |
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492 | |
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493 | domain.set_quantity('elevation', 0.0) # Flat bed |
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494 | domain.set_quantity('friction', 0.0) # Constant zero friction |
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495 | |
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496 | domain.set_quantity('stage', expression='elevation + %d' % d) |
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497 | |
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498 | #---------------------------------------------------------------------- |
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499 | # Setup boundary conditions |
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500 | #---------------------------------------------------------------------- |
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501 | |
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502 | Br = Reflective_boundary(domain) # Solid reflective wall |
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503 | |
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504 | # Constant flow in and out of domain |
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505 | # Depth = 1m, uh=1 m/s, i.e. a flow of 20 m^3/s |
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506 | Bi = Dirichlet_boundary([d, uh, vh]) |
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507 | Bo = Dirichlet_boundary([d, uh, vh]) |
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508 | |
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509 | domain.set_boundary({'left': Bi, 'right': Bo, 'top': Br, 'bottom': Br}) |
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510 | |
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511 | #---------------------------------------------------------------------- |
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512 | # Evolve system through time |
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513 | #---------------------------------------------------------------------- |
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514 | |
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515 | for t in domain.evolve(yieldstep=50.0, finaltime=finaltime): |
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516 | S = domain.volumetric_balance_statistics() |
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517 | if verbose : |
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518 | print domain.timestepping_statistics() |
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519 | print S |
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520 | |
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521 | if t > 300: |
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522 | # Steady state reached |
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523 | |
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524 | # Square on flowline at 200m |
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525 | q = domain.get_flow_through_cross_section([[200.0, 0.0], |
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526 | [200.0, 20.0]]) |
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527 | |
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528 | assert num.allclose(q, ref_flow) |
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529 | |
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530 | os.remove('Inflow_flowline_test.sww') |
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531 | |
---|
532 | def test_volume_conservation_inflow(self): |
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533 | """test_volume_conservation |
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534 | |
---|
535 | Test that total volume in domain is as expected, based on questions |
---|
536 | raised by Petar Milevski in May 2009. |
---|
537 | |
---|
538 | This test adds inflow at a known rate and verifies that the total |
---|
539 | terminal volume is as expected. |
---|
540 | |
---|
541 | """ |
---|
542 | |
---|
543 | verbose = False |
---|
544 | |
---|
545 | |
---|
546 | #--------------------------------------------------------------------- |
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547 | # Import necessary modules |
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548 | #--------------------------------------------------------------------- |
---|
549 | from anuga.abstract_2d_finite_volumes.mesh_factory import rectangular_cross |
---|
550 | from anuga.shallow_water import Domain |
---|
551 | from anuga.shallow_water.shallow_water_domain import Reflective_boundary |
---|
552 | from anuga.shallow_water.shallow_water_domain import Dirichlet_boundary |
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553 | from anuga.shallow_water.shallow_water_domain import Inflow |
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554 | from anuga.shallow_water.data_manager import get_flow_through_cross_section |
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555 | |
---|
556 | #---------------------------------------------------------------------- |
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557 | # Setup computational domain |
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558 | #---------------------------------------------------------------------- |
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559 | finaltime = 200.0 |
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560 | |
---|
561 | length = 300. |
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562 | width = 20. |
---|
563 | dx = dy = 5 # Resolution: of grid on both axes |
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564 | |
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565 | |
---|
566 | points, vertices, boundary = rectangular_cross(int(length/dx), |
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567 | int(width/dy), |
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568 | len1=length, len2=width) |
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569 | |
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570 | |
---|
571 | domain = Domain(points, vertices, boundary) |
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572 | domain.set_name('Inflow_volume_test') # Output name |
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573 | |
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574 | |
---|
575 | #---------------------------------------------------------------------- |
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576 | # Setup initial conditions |
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577 | #---------------------------------------------------------------------- |
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578 | slope = 0.0 |
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579 | def topography(x, y): |
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580 | z=-x * slope |
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581 | return z |
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582 | |
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583 | domain.set_quantity('elevation', topography) # Use function for elevation |
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584 | domain.set_quantity('friction', 0.0) # Constant friction |
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585 | |
---|
586 | domain.set_quantity('stage', |
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587 | expression='elevation') # Dry initially |
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588 | |
---|
589 | |
---|
590 | #-------------------------------------------------------------- |
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591 | # Setup Inflow |
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592 | #-------------------------------------------------------------- |
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593 | |
---|
594 | # Fixed Flowrate onto Area |
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595 | fixed_inflow = Inflow(domain, |
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596 | center=(10.0, 10.0), |
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597 | radius=5.00, |
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598 | rate=10.00) |
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599 | |
---|
600 | domain.forcing_terms.append(fixed_inflow) |
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601 | |
---|
602 | #---------------------------------------------------------------------- |
---|
603 | # Setup boundary conditions |
---|
604 | #---------------------------------------------------------------------- |
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605 | |
---|
606 | Br = Reflective_boundary(domain) # Solid reflective wall |
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607 | domain.set_boundary({'left': Br, 'right': Br, 'top': Br, 'bottom': Br}) |
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608 | |
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609 | |
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610 | #---------------------------------------------------------------------- |
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611 | # Evolve system through time |
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612 | #---------------------------------------------------------------------- |
---|
613 | ref_volume = 0.0 |
---|
614 | ys = 10.0 # Yieldstep |
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615 | for t in domain.evolve(yieldstep=ys, finaltime=finaltime): |
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616 | |
---|
617 | # Check volume |
---|
618 | assert num.allclose(domain.compute_total_volume(), ref_volume) |
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619 | |
---|
620 | if verbose : |
---|
621 | print domain.timestepping_statistics() |
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622 | print domain.volumetric_balance_statistics() |
---|
623 | print 'reference volume', ref_volume |
---|
624 | |
---|
625 | |
---|
626 | # Update reference volume |
---|
627 | ref_volume += ys * fixed_inflow.rate |
---|
628 | |
---|
629 | |
---|
630 | os.remove('Inflow_volume_test.sww') |
---|
631 | |
---|
632 | |
---|
633 | |
---|
634 | def test_volume_conservation_rain(self): |
---|
635 | """test_volume_conservation |
---|
636 | |
---|
637 | Test that total volume in domain is as expected, based on questions |
---|
638 | raised by Petar Milevski in May 2009. |
---|
639 | |
---|
640 | This test adds rain at a known rate and verifies that the total |
---|
641 | terminal volume is as expected. |
---|
642 | |
---|
643 | """ |
---|
644 | |
---|
645 | verbose = False |
---|
646 | |
---|
647 | |
---|
648 | #--------------------------------------------------------------------- |
---|
649 | # Import necessary modules |
---|
650 | #--------------------------------------------------------------------- |
---|
651 | from anuga.abstract_2d_finite_volumes.mesh_factory import rectangular_cross |
---|
652 | from anuga.shallow_water import Domain |
---|
653 | from anuga.shallow_water.shallow_water_domain import Reflective_boundary |
---|
654 | from anuga.shallow_water.shallow_water_domain import Dirichlet_boundary |
---|
655 | from anuga.shallow_water.shallow_water_domain import Rainfall |
---|
656 | from anuga.shallow_water.data_manager import get_flow_through_cross_section |
---|
657 | |
---|
658 | #---------------------------------------------------------------------- |
---|
659 | # Setup computational domain |
---|
660 | #---------------------------------------------------------------------- |
---|
661 | finaltime = 200.0 |
---|
662 | |
---|
663 | length = 300. |
---|
664 | width = 20. |
---|
665 | dx = dy = 5 # Resolution: of grid on both axes |
---|
666 | |
---|
667 | |
---|
668 | points, vertices, boundary = rectangular_cross(int(length/dx), |
---|
669 | int(width/dy), |
---|
670 | len1=length, len2=width) |
---|
671 | |
---|
672 | |
---|
673 | domain = Domain(points, vertices, boundary) |
---|
674 | domain.set_name('Rain_volume_test') # Output name |
---|
675 | |
---|
676 | |
---|
677 | #---------------------------------------------------------------------- |
---|
678 | # Setup initial conditions |
---|
679 | #---------------------------------------------------------------------- |
---|
680 | slope = 0.0 |
---|
681 | def topography(x, y): |
---|
682 | z=-x * slope |
---|
683 | return z |
---|
684 | |
---|
685 | domain.set_quantity('elevation', topography) # Use function for elevation |
---|
686 | domain.set_quantity('friction', 0.0) # Constant friction |
---|
687 | |
---|
688 | domain.set_quantity('stage', |
---|
689 | expression='elevation') # Dry initially |
---|
690 | |
---|
691 | |
---|
692 | #-------------------------------------------------------------- |
---|
693 | # Setup rain |
---|
694 | #-------------------------------------------------------------- |
---|
695 | |
---|
696 | # Fixed rain onto small circular area |
---|
697 | fixed_rain = Rainfall(domain, |
---|
698 | center=(10.0, 10.0), |
---|
699 | radius=5.00, |
---|
700 | rate=10.00) # 10 mm/s |
---|
701 | |
---|
702 | domain.forcing_terms.append(fixed_rain) |
---|
703 | |
---|
704 | #---------------------------------------------------------------------- |
---|
705 | # Setup boundary conditions |
---|
706 | #---------------------------------------------------------------------- |
---|
707 | |
---|
708 | Br = Reflective_boundary(domain) # Solid reflective wall |
---|
709 | domain.set_boundary({'left': Br, 'right': Br, 'top': Br, 'bottom': Br}) |
---|
710 | |
---|
711 | |
---|
712 | #---------------------------------------------------------------------- |
---|
713 | # Evolve system through time |
---|
714 | #---------------------------------------------------------------------- |
---|
715 | ref_volume = 0.0 |
---|
716 | ys = 10.0 # Yieldstep |
---|
717 | for t in domain.evolve(yieldstep=ys, finaltime=finaltime): |
---|
718 | |
---|
719 | # Check volume |
---|
720 | V = domain.compute_total_volume() |
---|
721 | msg = 'V = %e, Ref = %e' % (V, ref_volume) |
---|
722 | assert num.allclose(V, ref_volume), msg |
---|
723 | |
---|
724 | if verbose : |
---|
725 | print domain.timestepping_statistics() |
---|
726 | print domain.volumetric_balance_statistics() |
---|
727 | print 'reference volume', ref_volume |
---|
728 | print V |
---|
729 | |
---|
730 | |
---|
731 | # Update reference volume. |
---|
732 | # FIXME: Note that rate has now been redefined |
---|
733 | # as m/s internally. This is a little confusing |
---|
734 | # when it was specfied as mm/s. |
---|
735 | |
---|
736 | delta_V = fixed_rain.rate*fixed_rain.exchange_area |
---|
737 | ref_volume += ys * delta_V |
---|
738 | |
---|
739 | os.remove('Rain_volume_test.sww') |
---|
740 | |
---|
741 | def Xtest_rain_conservation_and_runoff(self): |
---|
742 | """test_rain_conservation_and_runoff |
---|
743 | |
---|
744 | Test that total volume in domain is as expected, based on questions |
---|
745 | raised by Petar Milevski in May 2009. |
---|
746 | |
---|
747 | This test adds rain at a known rate and verifies that the total |
---|
748 | volume and outflows are as expected. |
---|
749 | |
---|
750 | """ |
---|
751 | |
---|
752 | # FIXME (Ole): Does not work yet. Investigate boundary flows |
---|
753 | |
---|
754 | verbose = True #False |
---|
755 | |
---|
756 | |
---|
757 | #--------------------------------------------------------------------- |
---|
758 | # Import necessary modules |
---|
759 | #--------------------------------------------------------------------- |
---|
760 | from anuga.abstract_2d_finite_volumes.mesh_factory import rectangular_cross |
---|
761 | from anuga.shallow_water import Domain |
---|
762 | from anuga.shallow_water.shallow_water_domain import Reflective_boundary |
---|
763 | from anuga.shallow_water.shallow_water_domain import Dirichlet_boundary |
---|
764 | from anuga.shallow_water.shallow_water_domain import Rainfall |
---|
765 | from anuga.shallow_water.data_manager import get_flow_through_cross_section |
---|
766 | |
---|
767 | #---------------------------------------------------------------------- |
---|
768 | # Setup computational domain |
---|
769 | #---------------------------------------------------------------------- |
---|
770 | finaltime = 500.0 |
---|
771 | |
---|
772 | length = 300. |
---|
773 | width = 20. |
---|
774 | dx = dy = 5 # Resolution: of grid on both axes |
---|
775 | |
---|
776 | |
---|
777 | points, vertices, boundary = rectangular_cross(int(length/dx), |
---|
778 | int(width/dy), |
---|
779 | len1=length, len2=width) |
---|
780 | |
---|
781 | |
---|
782 | domain = Domain(points, vertices, boundary) |
---|
783 | domain.set_name('Rain_volume_runoff_test') # Output name |
---|
784 | |
---|
785 | |
---|
786 | #---------------------------------------------------------------------- |
---|
787 | # Setup initial conditions |
---|
788 | #---------------------------------------------------------------------- |
---|
789 | slope = 0.0 |
---|
790 | def topography(x, y): |
---|
791 | z=-x * slope |
---|
792 | return z |
---|
793 | |
---|
794 | domain.set_quantity('elevation', topography) # Use function for elevation |
---|
795 | domain.set_quantity('friction', 0.0) # Constant friction |
---|
796 | |
---|
797 | domain.set_quantity('stage', |
---|
798 | expression='elevation') # Dry initially |
---|
799 | |
---|
800 | |
---|
801 | #-------------------------------------------------------------- |
---|
802 | # Setup rain |
---|
803 | #-------------------------------------------------------------- |
---|
804 | |
---|
805 | # Fixed rain onto small circular area |
---|
806 | fixed_rain = Rainfall(domain, |
---|
807 | center=(10.0, 10.0), |
---|
808 | radius=5.00, |
---|
809 | rate=10.00) # 10 mm/s |
---|
810 | |
---|
811 | domain.forcing_terms.append(fixed_rain) |
---|
812 | |
---|
813 | #---------------------------------------------------------------------- |
---|
814 | # Setup boundary conditions |
---|
815 | #---------------------------------------------------------------------- |
---|
816 | |
---|
817 | Br = Reflective_boundary(domain) # Solid reflective wall |
---|
818 | Bt = Transmissive_stage_zero_momentum_boundary(domain) |
---|
819 | Bd = Dirichlet_boundary([-10, 0, 0]) |
---|
820 | domain.set_boundary({'left': Bt, 'right': Bd, 'top': Bt, 'bottom': Bt}) |
---|
821 | |
---|
822 | |
---|
823 | #---------------------------------------------------------------------- |
---|
824 | # Evolve system through time |
---|
825 | #---------------------------------------------------------------------- |
---|
826 | ref_volume = 0.0 |
---|
827 | ys = 10.0 # Yieldstep |
---|
828 | for t in domain.evolve(yieldstep=ys, finaltime=finaltime): |
---|
829 | |
---|
830 | # Check volume |
---|
831 | V = domain.compute_total_volume() |
---|
832 | msg = 'V = %e, Ref = %e' % (V, ref_volume) |
---|
833 | #assert num.allclose(V, ref_volume) or V < ref_volume, msg |
---|
834 | |
---|
835 | if verbose: |
---|
836 | print domain.timestepping_statistics() |
---|
837 | print domain.volumetric_balance_statistics() |
---|
838 | print 'reference volume', ref_volume |
---|
839 | print V |
---|
840 | |
---|
841 | |
---|
842 | # Update reference volume. |
---|
843 | # FIXME: Note that rate has now been redefined |
---|
844 | # as m/s internally. This is a little confusing |
---|
845 | # when it was specfied as mm/s. |
---|
846 | |
---|
847 | delta_V = fixed_rain.rate*fixed_rain.exchange_area |
---|
848 | ref_volume += ys * delta_V |
---|
849 | |
---|
850 | # Compute outflow at right hand downstream boundary |
---|
851 | boundary_flows, inflow , outflow = domain.compute_boundary_flows() |
---|
852 | net_outflow = outflow - inflow |
---|
853 | |
---|
854 | outflow = boundary_flows['right'] |
---|
855 | if verbose: |
---|
856 | print 'Outflow', outflow |
---|
857 | print 'Net outflow', net_outflow |
---|
858 | |
---|
859 | # Update reference volume |
---|
860 | ref_volume += ys * outflow |
---|
861 | |
---|
862 | |
---|
863 | |
---|
864 | ################################################################################# |
---|
865 | |
---|
866 | if __name__ == "__main__": |
---|
867 | suite = unittest.makeSuite(Test_swb_conservation, 'test') |
---|
868 | runner = unittest.TextTestRunner(verbosity=1) |
---|
869 | runner.run(suite) |
---|