1 | """ Test environmental forcing - rain, wind, etc. |
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2 | """ |
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3 | |
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4 | import unittest, os |
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5 | from anuga.shallow_water import Domain |
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6 | from boundaries import Reflective_boundary |
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7 | from anuga.coordinate_transforms.geo_reference import Geo_reference |
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8 | from forcing import * |
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9 | |
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10 | import numpy as num |
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11 | |
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12 | |
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13 | def scalar_func_list(t, x, y): |
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14 | """Function that returns a scalar. |
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15 | |
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16 | Used to test error message when numeric array is expected |
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17 | """ |
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18 | |
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19 | return [17.7] |
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20 | |
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21 | |
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22 | def speed(t, x, y): |
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23 | """ |
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24 | Variable windfield implemented using functions |
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25 | Large speeds halfway between center and edges |
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26 | |
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27 | Low speeds at center and edges |
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28 | """ |
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29 | |
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30 | from math import exp, cos, pi |
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31 | |
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32 | x = num.array(x) |
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33 | y = num.array(y) |
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34 | |
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35 | N = len(x) |
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36 | s = 0*x #New array |
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37 | |
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38 | for k in range(N): |
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39 | r = num.sqrt(x[k]**2 + y[k]**2) |
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40 | factor = exp(-(r-0.15)**2) |
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41 | s[k] = 4000 * factor * (cos(t*2*pi/150) + 2) |
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42 | |
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43 | return s |
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44 | |
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45 | |
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46 | def angle(t, x, y): |
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47 | """Rotating field |
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48 | """ |
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49 | from math import atan, pi |
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50 | |
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51 | x = num.array(x) |
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52 | y = num.array(y) |
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53 | |
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54 | N = len(x) |
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55 | a = 0 * x # New array |
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56 | |
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57 | for k in range(N): |
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58 | r = num.sqrt(x[k]**2 + y[k]**2) |
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59 | |
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60 | angle = atan(y[k]/x[k]) |
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61 | |
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62 | if x[k] < 0: |
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63 | angle += pi |
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64 | |
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65 | # Take normal direction |
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66 | angle -= pi/2 |
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67 | |
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68 | # Ensure positive radians |
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69 | if angle < 0: |
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70 | angle += 2*pi |
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71 | |
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72 | a[k] = angle/pi*180 |
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73 | |
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74 | return a |
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75 | |
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76 | |
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77 | |
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78 | class Test_Forcing(unittest.TestCase): |
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79 | def setUp(self): |
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80 | pass |
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81 | |
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82 | def tearDown(self): |
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83 | pass |
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84 | |
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85 | def test_constant_wind_stress(self): |
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86 | from anuga.config import rho_a, rho_w, eta_w |
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87 | from math import pi, cos, sin |
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88 | |
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89 | a = [0.0, 0.0] |
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90 | b = [0.0, 2.0] |
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91 | c = [2.0, 0.0] |
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92 | d = [0.0, 4.0] |
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93 | e = [2.0, 2.0] |
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94 | f = [4.0, 0.0] |
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95 | |
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96 | points = [a, b, c, d, e, f] |
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97 | # bac, bce, ecf, dbe |
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98 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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99 | |
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100 | domain = Domain(points, vertices) |
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101 | |
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102 | #Flat surface with 1m of water |
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103 | domain.set_quantity('elevation', 0) |
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104 | domain.set_quantity('stage', 1.0) |
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105 | domain.set_quantity('friction', 0) |
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106 | |
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107 | Br = Reflective_boundary(domain) |
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108 | domain.set_boundary({'exterior': Br}) |
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109 | |
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110 | #Setup only one forcing term, constant wind stress |
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111 | s = 100 |
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112 | phi = 135 |
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113 | domain.forcing_terms = [] |
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114 | domain.forcing_terms.append(Wind_stress(s, phi)) |
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115 | |
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116 | domain.compute_forcing_terms() |
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117 | |
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118 | const = eta_w*rho_a / rho_w |
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119 | |
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120 | #Convert to radians |
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121 | phi = phi*pi / 180 |
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122 | |
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123 | #Compute velocity vector (u, v) |
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124 | u = s*cos(phi) |
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125 | v = s*sin(phi) |
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126 | |
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127 | #Compute wind stress |
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128 | S = const * num.sqrt(u**2 + v**2) |
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129 | |
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130 | assert num.allclose(domain.quantities['stage'].explicit_update, 0) |
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131 | assert num.allclose(domain.quantities['xmomentum'].explicit_update, S*u) |
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132 | assert num.allclose(domain.quantities['ymomentum'].explicit_update, S*v) |
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133 | |
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134 | def test_variable_wind_stress(self): |
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135 | from anuga.config import rho_a, rho_w, eta_w |
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136 | from math import pi, cos, sin |
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137 | |
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138 | a = [0.0, 0.0] |
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139 | b = [0.0, 2.0] |
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140 | c = [2.0, 0.0] |
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141 | d = [0.0, 4.0] |
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142 | e = [2.0, 2.0] |
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143 | f = [4.0, 0.0] |
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144 | |
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145 | points = [a, b, c, d, e, f] |
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146 | # bac, bce, ecf, dbe |
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147 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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148 | |
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149 | domain = Domain(points, vertices) |
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150 | |
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151 | #Flat surface with 1m of water |
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152 | domain.set_quantity('elevation', 0) |
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153 | domain.set_quantity('stage', 1.0) |
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154 | domain.set_quantity('friction', 0) |
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155 | |
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156 | Br = Reflective_boundary(domain) |
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157 | domain.set_boundary({'exterior': Br}) |
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158 | |
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159 | domain.time = 5.54 # Take a random time (not zero) |
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160 | |
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161 | #Setup only one forcing term, constant wind stress |
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162 | s = 100 |
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163 | phi = 135 |
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164 | domain.forcing_terms = [] |
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165 | domain.forcing_terms.append(Wind_stress(s=speed, phi=angle)) |
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166 | |
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167 | domain.compute_forcing_terms() |
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168 | |
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169 | #Compute reference solution |
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170 | const = eta_w*rho_a / rho_w |
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171 | |
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172 | N = len(domain) # number_of_triangles |
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173 | |
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174 | xc = domain.get_centroid_coordinates() |
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175 | t = domain.time |
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176 | |
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177 | x = xc[:,0] |
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178 | y = xc[:,1] |
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179 | s_vec = speed(t,x,y) |
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180 | phi_vec = angle(t,x,y) |
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181 | |
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182 | for k in range(N): |
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183 | # Convert to radians |
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184 | phi = phi_vec[k]*pi / 180 |
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185 | s = s_vec[k] |
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186 | |
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187 | # Compute velocity vector (u, v) |
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188 | u = s*cos(phi) |
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189 | v = s*sin(phi) |
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190 | |
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191 | # Compute wind stress |
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192 | S = const * num.sqrt(u**2 + v**2) |
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193 | |
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194 | assert num.allclose(domain.quantities['stage'].explicit_update[k], |
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195 | 0) |
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196 | assert num.allclose(domain.quantities['xmomentum'].\ |
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197 | explicit_update[k], |
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198 | S*u) |
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199 | assert num.allclose(domain.quantities['ymomentum'].\ |
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200 | explicit_update[k], |
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201 | S*v) |
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202 | |
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203 | def test_windfield_from_file(self): |
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204 | import time |
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205 | from anuga.config import rho_a, rho_w, eta_w |
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206 | from math import pi, cos, sin |
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207 | from anuga.config import time_format |
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208 | from anuga.abstract_2d_finite_volumes.util import file_function |
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209 | |
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210 | a = [0.0, 0.0] |
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211 | b = [0.0, 2.0] |
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212 | c = [2.0, 0.0] |
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213 | d = [0.0, 4.0] |
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214 | e = [2.0, 2.0] |
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215 | f = [4.0, 0.0] |
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216 | |
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217 | points = [a, b, c, d, e, f] |
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218 | # bac, bce, ecf, dbe |
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219 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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220 | |
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221 | domain = Domain(points, vertices) |
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222 | |
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223 | # Flat surface with 1m of water |
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224 | domain.set_quantity('elevation', 0) |
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225 | domain.set_quantity('stage', 1.0) |
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226 | domain.set_quantity('friction', 0) |
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227 | |
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228 | Br = Reflective_boundary(domain) |
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229 | domain.set_boundary({'exterior': Br}) |
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230 | |
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231 | domain.time = 7 # Take a time that is represented in file (not zero) |
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232 | |
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233 | # Write wind stress file (ensure that domain.time is covered) |
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234 | # Take x=1 and y=0 |
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235 | filename = 'test_windstress_from_file' |
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236 | start = time.mktime(time.strptime('2000', '%Y')) |
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237 | fid = open(filename + '.txt', 'w') |
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238 | dt = 1 # One second interval |
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239 | t = 0.0 |
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240 | while t <= 10.0: |
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241 | t_string = time.strftime(time_format, time.gmtime(t+start)) |
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242 | |
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243 | fid.write('%s, %f %f\n' % |
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244 | (t_string, speed(t,[1],[0])[0], angle(t,[1],[0])[0])) |
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245 | t += dt |
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246 | |
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247 | fid.close() |
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248 | |
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249 | # Convert ASCII file to NetCDF (Which is what we really like!) |
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250 | from file_conversion import timefile2netcdf |
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251 | |
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252 | timefile2netcdf(filename) |
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253 | os.remove(filename + '.txt') |
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254 | |
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255 | # Setup wind stress |
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256 | F = file_function(filename + '.tms', |
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257 | quantities=['Attribute0', 'Attribute1']) |
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258 | os.remove(filename + '.tms') |
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259 | |
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260 | W = Wind_stress(F) |
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261 | |
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262 | domain.forcing_terms = [] |
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263 | domain.forcing_terms.append(W) |
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264 | |
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265 | domain.compute_forcing_terms() |
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266 | |
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267 | # Compute reference solution |
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268 | const = eta_w*rho_a / rho_w |
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269 | |
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270 | N = len(domain) # number_of_triangles |
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271 | |
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272 | t = domain.time |
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273 | |
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274 | s = speed(t, [1], [0])[0] |
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275 | phi = angle(t, [1], [0])[0] |
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276 | |
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277 | # Convert to radians |
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278 | phi = phi*pi / 180 |
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279 | |
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280 | # Compute velocity vector (u, v) |
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281 | u = s*cos(phi) |
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282 | v = s*sin(phi) |
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283 | |
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284 | # Compute wind stress |
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285 | S = const * num.sqrt(u**2 + v**2) |
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286 | |
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287 | for k in range(N): |
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288 | assert num.allclose(domain.quantities['stage'].explicit_update[k], |
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289 | 0) |
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290 | assert num.allclose(domain.quantities['xmomentum'].\ |
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291 | explicit_update[k], |
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292 | S*u) |
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293 | assert num.allclose(domain.quantities['ymomentum'].\ |
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294 | explicit_update[k], |
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295 | S*v) |
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296 | |
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297 | def test_windfield_from_file_seconds(self): |
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298 | import time |
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299 | from anuga.config import rho_a, rho_w, eta_w |
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300 | from math import pi, cos, sin |
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301 | from anuga.config import time_format |
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302 | from anuga.abstract_2d_finite_volumes.util import file_function |
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303 | |
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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 | # Flat surface with 1m of water |
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318 | domain.set_quantity('elevation', 0) |
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319 | domain.set_quantity('stage', 1.0) |
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320 | domain.set_quantity('friction', 0) |
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321 | |
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322 | Br = Reflective_boundary(domain) |
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323 | domain.set_boundary({'exterior': Br}) |
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324 | |
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325 | domain.time = 7 # Take a time that is represented in file (not zero) |
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326 | |
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327 | # Write wind stress file (ensure that domain.time is covered) |
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328 | # Take x=1 and y=0 |
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329 | filename = 'test_windstress_from_file' |
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330 | start = time.mktime(time.strptime('2000', '%Y')) |
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331 | fid = open(filename + '.txt', 'w') |
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332 | dt = 0.5 # Half second interval |
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333 | t = 0.0 |
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334 | while t <= 10.0: |
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335 | fid.write('%s, %f %f\n' |
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336 | % (str(t), speed(t, [1], [0])[0], angle(t, [1], [0])[0])) |
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337 | t += dt |
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338 | |
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339 | fid.close() |
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340 | |
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341 | # Convert ASCII file to NetCDF (Which is what we really like!) |
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342 | from file_conversion import timefile2netcdf |
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343 | |
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344 | timefile2netcdf(filename, time_as_seconds=True) |
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345 | os.remove(filename + '.txt') |
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346 | |
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347 | # Setup wind stress |
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348 | F = file_function(filename + '.tms', |
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349 | quantities=['Attribute0', 'Attribute1']) |
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350 | os.remove(filename + '.tms') |
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351 | |
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352 | W = Wind_stress(F) |
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353 | |
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354 | domain.forcing_terms = [] |
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355 | domain.forcing_terms.append(W) |
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356 | |
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357 | domain.compute_forcing_terms() |
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358 | |
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359 | # Compute reference solution |
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360 | const = eta_w*rho_a / rho_w |
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361 | |
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362 | N = len(domain) # number_of_triangles |
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363 | |
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364 | t = domain.time |
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365 | |
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366 | s = speed(t, [1], [0])[0] |
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367 | phi = angle(t, [1], [0])[0] |
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368 | |
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369 | # Convert to radians |
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370 | phi = phi*pi / 180 |
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371 | |
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372 | # Compute velocity vector (u, v) |
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373 | u = s*cos(phi) |
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374 | v = s*sin(phi) |
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375 | |
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376 | # Compute wind stress |
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377 | S = const * num.sqrt(u**2 + v**2) |
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378 | |
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379 | for k in range(N): |
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380 | assert num.allclose(domain.quantities['stage'].explicit_update[k], |
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381 | 0) |
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382 | assert num.allclose(domain.quantities['xmomentum'].\ |
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383 | explicit_update[k], |
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384 | S*u) |
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385 | assert num.allclose(domain.quantities['ymomentum'].\ |
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386 | explicit_update[k], |
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387 | S*v) |
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388 | |
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389 | def test_wind_stress_error_condition(self): |
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390 | """Test that windstress reacts properly when forcing functions |
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391 | are wrong - e.g. returns a scalar |
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392 | """ |
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393 | |
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394 | from math import pi, cos, sin |
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395 | from anuga.config import rho_a, rho_w, eta_w |
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396 | |
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397 | a = [0.0, 0.0] |
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398 | b = [0.0, 2.0] |
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399 | c = [2.0, 0.0] |
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400 | d = [0.0, 4.0] |
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401 | e = [2.0, 2.0] |
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402 | f = [4.0, 0.0] |
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403 | |
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404 | points = [a, b, c, d, e, f] |
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405 | # bac, bce, ecf, dbe |
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406 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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407 | |
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408 | domain = Domain(points, vertices) |
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409 | |
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410 | # Flat surface with 1m of water |
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411 | domain.set_quantity('elevation', 0) |
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412 | domain.set_quantity('stage', 1.0) |
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413 | domain.set_quantity('friction', 0) |
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414 | |
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415 | Br = Reflective_boundary(domain) |
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416 | domain.set_boundary({'exterior': Br}) |
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417 | |
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418 | domain.time = 5.54 # Take a random time (not zero) |
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419 | |
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420 | # Setup only one forcing term, bad func |
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421 | domain.forcing_terms = [] |
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422 | |
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423 | try: |
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424 | domain.forcing_terms.append(Wind_stress(s=scalar_func_list, |
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425 | phi=angle)) |
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426 | except AssertionError: |
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427 | pass |
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428 | else: |
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429 | msg = 'Should have raised exception' |
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430 | raise Exception, msg |
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431 | |
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432 | try: |
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433 | domain.forcing_terms.append(Wind_stress(s=speed, phi=scalar_func)) |
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434 | except Exception: |
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435 | pass |
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436 | else: |
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437 | msg = 'Should have raised exception' |
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438 | raise Exception, msg |
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439 | |
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440 | try: |
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441 | domain.forcing_terms.append(Wind_stress(s=speed, phi='xx')) |
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442 | except: |
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443 | pass |
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444 | else: |
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445 | msg = 'Should have raised exception' |
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446 | raise Exception, msg |
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447 | |
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448 | def test_rainfall(self): |
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449 | from math import pi, cos, sin |
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450 | |
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451 | a = [0.0, 0.0] |
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452 | b = [0.0, 2.0] |
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453 | c = [2.0, 0.0] |
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454 | d = [0.0, 4.0] |
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455 | e = [2.0, 2.0] |
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456 | f = [4.0, 0.0] |
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457 | |
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458 | points = [a, b, c, d, e, f] |
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459 | # bac, bce, ecf, dbe |
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460 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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461 | |
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462 | domain = Domain(points, vertices) |
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463 | |
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464 | # Flat surface with 1m of water |
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465 | domain.set_quantity('elevation', 0) |
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466 | domain.set_quantity('stage', 1.0) |
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467 | domain.set_quantity('friction', 0) |
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468 | |
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469 | Br = Reflective_boundary(domain) |
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470 | domain.set_boundary({'exterior': Br}) |
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471 | |
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472 | # Setup only one forcing term, constant rainfall |
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473 | domain.forcing_terms = [] |
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474 | domain.forcing_terms.append(Rainfall(domain, rate=2.0)) |
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475 | |
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476 | domain.compute_forcing_terms() |
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477 | assert num.allclose(domain.quantities['stage'].explicit_update, |
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478 | 2.0/1000) |
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479 | |
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480 | def test_rainfall_restricted_by_polygon(self): |
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481 | from math import pi, cos, sin |
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482 | |
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483 | a = [0.0, 0.0] |
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484 | b = [0.0, 2.0] |
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485 | c = [2.0, 0.0] |
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486 | d = [0.0, 4.0] |
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487 | e = [2.0, 2.0] |
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488 | f = [4.0, 0.0] |
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489 | |
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490 | points = [a, b, c, d, e, f] |
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491 | # bac, bce, ecf, dbe |
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492 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
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493 | |
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494 | domain = Domain(points, vertices) |
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495 | |
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496 | # Flat surface with 1m of water |
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497 | domain.set_quantity('elevation', 0) |
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498 | domain.set_quantity('stage', 1.0) |
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499 | domain.set_quantity('friction', 0) |
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500 | |
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501 | Br = Reflective_boundary(domain) |
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502 | domain.set_boundary({'exterior': Br}) |
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503 | |
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504 | # Setup only one forcing term, constant rainfall |
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505 | # restricted to a polygon enclosing triangle #1 (bce) |
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506 | domain.forcing_terms = [] |
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507 | R = Rainfall(domain, rate=2.0, polygon=[[1,1], [2,1], [2,2], [1,2]]) |
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508 | |
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509 | assert num.allclose(R.exchange_area, 2) |
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510 | |
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511 | domain.forcing_terms.append(R) |
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512 | |
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513 | domain.compute_forcing_terms() |
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514 | |
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515 | assert num.allclose(domain.quantities['stage'].explicit_update[1], |
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516 | 2.0/1000) |
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517 | assert num.allclose(domain.quantities['stage'].explicit_update[0], 0) |
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518 | assert num.allclose(domain.quantities['stage'].explicit_update[2:], 0) |
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519 | |
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520 | def test_time_dependent_rainfall_restricted_by_polygon(self): |
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521 | a = [0.0, 0.0] |
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522 | b = [0.0, 2.0] |
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523 | c = [2.0, 0.0] |
---|
524 | d = [0.0, 4.0] |
---|
525 | e = [2.0, 2.0] |
---|
526 | f = [4.0, 0.0] |
---|
527 | |
---|
528 | points = [a, b, c, d, e, f] |
---|
529 | # bac, bce, ecf, dbe |
---|
530 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
---|
531 | |
---|
532 | domain = Domain(points, vertices) |
---|
533 | |
---|
534 | # Flat surface with 1m of water |
---|
535 | domain.set_quantity('elevation', 0) |
---|
536 | domain.set_quantity('stage', 1.0) |
---|
537 | domain.set_quantity('friction', 0) |
---|
538 | |
---|
539 | Br = Reflective_boundary(domain) |
---|
540 | domain.set_boundary({'exterior': Br}) |
---|
541 | |
---|
542 | # Setup only one forcing term, time dependent rainfall |
---|
543 | # restricted to a polygon enclosing triangle #1 (bce) |
---|
544 | domain.forcing_terms = [] |
---|
545 | R = Rainfall(domain, |
---|
546 | rate=lambda t: 3*t + 7, |
---|
547 | polygon = [[1,1], [2,1], [2,2], [1,2]]) |
---|
548 | |
---|
549 | assert num.allclose(R.exchange_area, 2) |
---|
550 | |
---|
551 | domain.forcing_terms.append(R) |
---|
552 | |
---|
553 | domain.time = 10. |
---|
554 | |
---|
555 | domain.compute_forcing_terms() |
---|
556 | |
---|
557 | assert num.allclose(domain.quantities['stage'].explicit_update[1], |
---|
558 | (3*domain.time + 7)/1000) |
---|
559 | assert num.allclose(domain.quantities['stage'].explicit_update[0], 0) |
---|
560 | assert num.allclose(domain.quantities['stage'].explicit_update[2:], 0) |
---|
561 | |
---|
562 | def test_time_dependent_rainfall_using_starttime(self): |
---|
563 | rainfall_poly = ensure_numeric([[1,1], [2,1], [2,2], [1,2]], num.float) |
---|
564 | |
---|
565 | a = [0.0, 0.0] |
---|
566 | b = [0.0, 2.0] |
---|
567 | c = [2.0, 0.0] |
---|
568 | d = [0.0, 4.0] |
---|
569 | e = [2.0, 2.0] |
---|
570 | f = [4.0, 0.0] |
---|
571 | |
---|
572 | points = [a, b, c, d, e, f] |
---|
573 | # bac, bce, ecf, dbe |
---|
574 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
---|
575 | |
---|
576 | domain = Domain(points, vertices) |
---|
577 | |
---|
578 | # Flat surface with 1m of water |
---|
579 | domain.set_quantity('elevation', 0) |
---|
580 | domain.set_quantity('stage', 1.0) |
---|
581 | domain.set_quantity('friction', 0) |
---|
582 | |
---|
583 | Br = Reflective_boundary(domain) |
---|
584 | domain.set_boundary({'exterior': Br}) |
---|
585 | |
---|
586 | # Setup only one forcing term, time dependent rainfall |
---|
587 | # restricted to a polygon enclosing triangle #1 (bce) |
---|
588 | domain.forcing_terms = [] |
---|
589 | R = Rainfall(domain, |
---|
590 | rate=lambda t: 3*t + 7, |
---|
591 | polygon=rainfall_poly) |
---|
592 | |
---|
593 | assert num.allclose(R.exchange_area, 2) |
---|
594 | |
---|
595 | domain.forcing_terms.append(R) |
---|
596 | |
---|
597 | # This will test that time used in the forcing function takes |
---|
598 | # startime into account. |
---|
599 | domain.starttime = 5.0 |
---|
600 | |
---|
601 | domain.time = 7. |
---|
602 | |
---|
603 | domain.compute_forcing_terms() |
---|
604 | |
---|
605 | assert num.allclose(domain.quantities['stage'].explicit_update[1], |
---|
606 | (3*domain.get_time() + 7)/1000) |
---|
607 | assert num.allclose(domain.quantities['stage'].explicit_update[1], |
---|
608 | (3*(domain.time + domain.starttime) + 7)/1000) |
---|
609 | |
---|
610 | # Using internal time her should fail |
---|
611 | assert not num.allclose(domain.quantities['stage'].explicit_update[1], |
---|
612 | (3*domain.time + 7)/1000) |
---|
613 | |
---|
614 | assert num.allclose(domain.quantities['stage'].explicit_update[0], 0) |
---|
615 | assert num.allclose(domain.quantities['stage'].explicit_update[2:], 0) |
---|
616 | |
---|
617 | def test_time_dependent_rainfall_using_georef(self): |
---|
618 | """test_time_dependent_rainfall_using_georef |
---|
619 | |
---|
620 | This will also test the General forcing term using georef |
---|
621 | """ |
---|
622 | |
---|
623 | # Mesh in zone 56 (absolute coords) |
---|
624 | x0 = 314036.58727982 |
---|
625 | y0 = 6224951.2960092 |
---|
626 | |
---|
627 | rainfall_poly = ensure_numeric([[1,1], [2,1], [2,2], [1,2]], num.float) |
---|
628 | rainfall_poly += [x0, y0] |
---|
629 | |
---|
630 | a = [0.0, 0.0] |
---|
631 | b = [0.0, 2.0] |
---|
632 | c = [2.0, 0.0] |
---|
633 | d = [0.0, 4.0] |
---|
634 | e = [2.0, 2.0] |
---|
635 | f = [4.0, 0.0] |
---|
636 | |
---|
637 | points = [a, b, c, d, e, f] |
---|
638 | # bac, bce, ecf, dbe |
---|
639 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
---|
640 | |
---|
641 | domain = Domain(points, vertices, |
---|
642 | geo_reference=Geo_reference(56, x0, y0)) |
---|
643 | |
---|
644 | # Flat surface with 1m of water |
---|
645 | domain.set_quantity('elevation', 0) |
---|
646 | domain.set_quantity('stage', 1.0) |
---|
647 | domain.set_quantity('friction', 0) |
---|
648 | |
---|
649 | Br = Reflective_boundary(domain) |
---|
650 | domain.set_boundary({'exterior': Br}) |
---|
651 | |
---|
652 | # Setup only one forcing term, time dependent rainfall |
---|
653 | # restricted to a polygon enclosing triangle #1 (bce) |
---|
654 | domain.forcing_terms = [] |
---|
655 | R = Rainfall(domain, |
---|
656 | rate=lambda t: 3*t + 7, |
---|
657 | polygon=rainfall_poly) |
---|
658 | |
---|
659 | assert num.allclose(R.exchange_area, 2) |
---|
660 | |
---|
661 | domain.forcing_terms.append(R) |
---|
662 | |
---|
663 | # This will test that time used in the forcing function takes |
---|
664 | # startime into account. |
---|
665 | domain.starttime = 5.0 |
---|
666 | |
---|
667 | domain.time = 7. |
---|
668 | |
---|
669 | domain.compute_forcing_terms() |
---|
670 | |
---|
671 | assert num.allclose(domain.quantities['stage'].explicit_update[1], |
---|
672 | (3*domain.get_time() + 7)/1000) |
---|
673 | assert num.allclose(domain.quantities['stage'].explicit_update[1], |
---|
674 | (3*(domain.time + domain.starttime) + 7)/1000) |
---|
675 | |
---|
676 | # Using internal time her should fail |
---|
677 | assert not num.allclose(domain.quantities['stage'].explicit_update[1], |
---|
678 | (3*domain.time + 7)/1000) |
---|
679 | |
---|
680 | assert num.allclose(domain.quantities['stage'].explicit_update[0], 0) |
---|
681 | assert num.allclose(domain.quantities['stage'].explicit_update[2:], 0) |
---|
682 | |
---|
683 | def test_time_dependent_rainfall_restricted_by_polygon_with_default(self): |
---|
684 | """ |
---|
685 | Test that default rainfall can be used when given rate runs out of data. |
---|
686 | """ |
---|
687 | |
---|
688 | a = [0.0, 0.0] |
---|
689 | b = [0.0, 2.0] |
---|
690 | c = [2.0, 0.0] |
---|
691 | d = [0.0, 4.0] |
---|
692 | e = [2.0, 2.0] |
---|
693 | f = [4.0, 0.0] |
---|
694 | |
---|
695 | points = [a, b, c, d, e, f] |
---|
696 | # bac, bce, ecf, dbe |
---|
697 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
---|
698 | |
---|
699 | domain = Domain(points, vertices) |
---|
700 | |
---|
701 | # Flat surface with 1m of water |
---|
702 | domain.set_quantity('elevation', 0) |
---|
703 | domain.set_quantity('stage', 1.0) |
---|
704 | domain.set_quantity('friction', 0) |
---|
705 | |
---|
706 | Br = Reflective_boundary(domain) |
---|
707 | domain.set_boundary({'exterior': Br}) |
---|
708 | |
---|
709 | # Setup only one forcing term, time dependent rainfall |
---|
710 | # that expires at t==20 |
---|
711 | from anuga.fit_interpolate.interpolate import Modeltime_too_late |
---|
712 | |
---|
713 | def main_rate(t): |
---|
714 | if t > 20: |
---|
715 | msg = 'Model time exceeded.' |
---|
716 | raise Modeltime_too_late, msg |
---|
717 | else: |
---|
718 | return 3*t + 7 |
---|
719 | |
---|
720 | domain.forcing_terms = [] |
---|
721 | R = Rainfall(domain, |
---|
722 | rate=main_rate, |
---|
723 | polygon = [[1,1], [2,1], [2,2], [1,2]], |
---|
724 | default_rate=5.0) |
---|
725 | |
---|
726 | assert num.allclose(R.exchange_area, 2) |
---|
727 | |
---|
728 | domain.forcing_terms.append(R) |
---|
729 | |
---|
730 | domain.time = 10. |
---|
731 | |
---|
732 | domain.compute_forcing_terms() |
---|
733 | |
---|
734 | assert num.allclose(domain.quantities['stage'].explicit_update[1], |
---|
735 | (3*domain.time+7)/1000) |
---|
736 | assert num.allclose(domain.quantities['stage'].explicit_update[0], 0) |
---|
737 | assert num.allclose(domain.quantities['stage'].explicit_update[2:], 0) |
---|
738 | |
---|
739 | domain.time = 100. |
---|
740 | domain.quantities['stage'].explicit_update[:] = 0.0 # Reset |
---|
741 | domain.compute_forcing_terms() |
---|
742 | |
---|
743 | assert num.allclose(domain.quantities['stage'].explicit_update[1], |
---|
744 | 5.0/1000) # Default value |
---|
745 | assert num.allclose(domain.quantities['stage'].explicit_update[0], 0) |
---|
746 | assert num.allclose(domain.quantities['stage'].explicit_update[2:], 0) |
---|
747 | |
---|
748 | def test_rainfall_forcing_with_evolve(self): |
---|
749 | """test_rainfall_forcing_with_evolve |
---|
750 | |
---|
751 | Test how forcing terms are called within evolve |
---|
752 | """ |
---|
753 | |
---|
754 | # FIXME(Ole): This test is just to experiment |
---|
755 | |
---|
756 | a = [0.0, 0.0] |
---|
757 | b = [0.0, 2.0] |
---|
758 | c = [2.0, 0.0] |
---|
759 | d = [0.0, 4.0] |
---|
760 | e = [2.0, 2.0] |
---|
761 | f = [4.0, 0.0] |
---|
762 | |
---|
763 | points = [a, b, c, d, e, f] |
---|
764 | # bac, bce, ecf, dbe |
---|
765 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
---|
766 | |
---|
767 | domain = Domain(points, vertices) |
---|
768 | |
---|
769 | # Flat surface with 1m of water |
---|
770 | domain.set_quantity('elevation', 0) |
---|
771 | domain.set_quantity('stage', 1.0) |
---|
772 | domain.set_quantity('friction', 0) |
---|
773 | |
---|
774 | Br = Reflective_boundary(domain) |
---|
775 | domain.set_boundary({'exterior': Br}) |
---|
776 | |
---|
777 | # Setup only one forcing term, time dependent rainfall |
---|
778 | # that expires at t==20 |
---|
779 | from anuga.fit_interpolate.interpolate import Modeltime_too_late |
---|
780 | |
---|
781 | def main_rate(t): |
---|
782 | if t > 20: |
---|
783 | msg = 'Model time exceeded.' |
---|
784 | raise Modeltime_too_late, msg |
---|
785 | else: |
---|
786 | return 3*t + 7 |
---|
787 | |
---|
788 | domain.forcing_terms = [] |
---|
789 | R = Rainfall(domain, |
---|
790 | rate=main_rate, |
---|
791 | polygon=[[1,1], [2,1], [2,2], [1,2]], |
---|
792 | default_rate=5.0) |
---|
793 | |
---|
794 | assert num.allclose(R.exchange_area, 2) |
---|
795 | |
---|
796 | domain.forcing_terms.append(R) |
---|
797 | |
---|
798 | for t in domain.evolve(yieldstep=1, finaltime=25): |
---|
799 | pass |
---|
800 | #FIXME(Ole): A test here is hard because explicit_update also |
---|
801 | # receives updates from the flux calculation. |
---|
802 | |
---|
803 | |
---|
804 | def test_rainfall_forcing_with_evolve_1(self): |
---|
805 | """test_rainfall_forcing_with_evolve |
---|
806 | |
---|
807 | Test how forcing terms are called within evolve. |
---|
808 | This test checks that proper exception is thrown when no default_rate is set |
---|
809 | """ |
---|
810 | |
---|
811 | |
---|
812 | a = [0.0, 0.0] |
---|
813 | b = [0.0, 2.0] |
---|
814 | c = [2.0, 0.0] |
---|
815 | d = [0.0, 4.0] |
---|
816 | e = [2.0, 2.0] |
---|
817 | f = [4.0, 0.0] |
---|
818 | |
---|
819 | points = [a, b, c, d, e, f] |
---|
820 | # bac, bce, ecf, dbe |
---|
821 | vertices = [[1,0,2], [1,2,4], [4,2,5], [3,1,4]] |
---|
822 | |
---|
823 | domain = Domain(points, vertices) |
---|
824 | |
---|
825 | # Flat surface with 1m of water |
---|
826 | domain.set_quantity('elevation', 0) |
---|
827 | domain.set_quantity('stage', 1.0) |
---|
828 | domain.set_quantity('friction', 0) |
---|
829 | |
---|
830 | Br = Reflective_boundary(domain) |
---|
831 | domain.set_boundary({'exterior': Br}) |
---|
832 | |
---|
833 | # Setup only one forcing term, time dependent rainfall |
---|
834 | # that expires at t==20 |
---|
835 | from anuga.fit_interpolate.interpolate import Modeltime_too_late |
---|
836 | |
---|
837 | def main_rate(t): |
---|
838 | if t > 20: |
---|
839 | msg = 'Model time exceeded.' |
---|
840 | raise Modeltime_too_late, msg |
---|
841 | else: |
---|
842 | return 3*t + 7 |
---|
843 | |
---|
844 | domain.forcing_terms = [] |
---|
845 | R = Rainfall(domain, |
---|
846 | rate=main_rate, |
---|
847 | polygon=[[1,1], [2,1], [2,2], [1,2]]) |
---|
848 | |
---|
849 | |
---|
850 | assert num.allclose(R.exchange_area, 2) |
---|
851 | |
---|
852 | domain.forcing_terms.append(R) |
---|
853 | #for t in domain.evolve(yieldstep=1, finaltime=25): |
---|
854 | # pass |
---|
855 | |
---|
856 | try: |
---|
857 | for t in domain.evolve(yieldstep=1, finaltime=25): |
---|
858 | pass |
---|
859 | except Modeltime_too_late, e: |
---|
860 | # Test that error message is as expected |
---|
861 | assert 'can specify keyword argument default_rate in the forcing function' in str(e) |
---|
862 | else: |
---|
863 | raise Exception, 'Should have raised exception' |
---|
864 | |
---|
865 | |
---|
866 | if __name__ == "__main__": |
---|
867 | suite = unittest.makeSuite(Test_Forcing, 'test') |
---|
868 | runner = unittest.TextTestRunner(verbosity=1) |
---|
869 | runner.run(suite) |
---|