1 | """Simple water flow example using ANUGA |
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2 | |
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3 | Water driven up a linear slope and time varying boundary, |
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4 | similar to a beach environment |
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5 | """ |
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6 | |
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7 | |
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8 | #------------------------------------------------------------------------------ |
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9 | # Import necessary modules |
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10 | #------------------------------------------------------------------------------ |
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11 | |
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12 | from anuga.abstract_2d_finite_volumes.mesh_factory import rectangular_cross |
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13 | from anuga.shallow_water import Domain |
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14 | from anuga.shallow_water import Reflective_boundary |
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15 | from anuga.shallow_water import Dirichlet_boundary |
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16 | from anuga.shallow_water import Time_boundary |
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17 | from anuga.shallow_water import Transmissive_boundary |
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18 | from anuga.shallow_water import Transmissive_Momentum_Set_Stage_boundary |
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19 | from anuga.shallow_water.data_manager import start_screen_catcher, copy_code_files |
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20 | from time import strftime, gmtime |
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21 | from os import sep, environ, getenv, getcwd,umask |
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22 | from anuga.utilities.polygon import Polygon_function |
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23 | from __future__ import division |
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24 | #------------------------------------------------------------------------------ |
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25 | # Setup computational domain |
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26 | #------------------------------------------------------------------------------ |
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27 | from anuga.pmesh.mesh_interface import create_mesh_from_regions |
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28 | |
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29 | name = 'wave_value_tester_900a' |
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30 | shelf = [50000] |
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31 | slope = [150000] |
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32 | wave = [-0.5] |
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33 | N = len (shelf) |
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34 | for i in range(N): |
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35 | M = len (slope) |
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36 | for k in range (M): |
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37 | B = len(wave) |
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38 | for l in range(B): |
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39 | length = (shelf[i]+slope[k]) |
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40 | width = 800. |
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41 | A = 1 |
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42 | T = 2700 |
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43 | umask(002) |
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44 | time = strftime('%Y%m%d_%H%M%S',gmtime()) |
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45 | ## output_dir = 'C:'+sep+'anuga_data'+sep+'topography'+sep+str(name)+sep+str(name)+'_'+str(wave[l])+'_'+str(shelf[i])+'_'+str(slope[k])+sep |
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46 | output_dir = sep+'d'+sep+'sim'+sep+'1'+sep+'mpittard'+sep+'idealised_bathymetry_study'+sep+'wave_value_testers'+sep+str(name)+'_'+str(wave[l])+'_'+str(shelf[i])+'_'+str(slope[k])+sep |
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47 | |
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48 | sww_file = str(name) |
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49 | copy_code_files(output_dir,__file__,__file__) |
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50 | start_screen_catcher(output_dir) |
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51 | boundary_polygon = [[0,0],[length,0],[length,width],[0,width]] |
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52 | |
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53 | meshname = str(name)+'.msh' |
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54 | create_mesh_from_regions(boundary_polygon, |
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55 | boundary_tags={'bottom': [0], |
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56 | 'right': [1], |
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57 | 'top': [2], |
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58 | 'left': [3]}, |
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59 | maximum_triangle_area=20000, |
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60 | filename=meshname, |
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61 | use_cache=False, |
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62 | verbose=False) |
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63 | |
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64 | domain = Domain(meshname, use_cache=True, verbose=True) |
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65 | |
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66 | print 'Number of triangles = ', len(domain) |
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67 | print 'The extent is ', domain.get_extent() |
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68 | print domain.statistics() |
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69 | |
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70 | domain.set_quantities_to_be_stored(['stage', 'xmomentum', 'ymomentum']) |
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71 | domain.set_minimum_storable_height(0.01) |
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72 | domain.set_default_order(2) |
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73 | domain.set_name(sww_file)# Output name |
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74 | domain.set_datadir(output_dir) |
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75 | |
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76 | |
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77 | #------------------------------------------------------------------------------ |
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78 | # Setup initial conditions |
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79 | #------------------------------------------------------------------------------ |
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80 | |
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81 | def topography(x,y): |
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82 | """Complex topography defined by a function of vectors x and y |
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83 | """ |
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84 | o = 2500/(slope[k]*slope[k]/4) |
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85 | print str(2500/(slope[k]*slope[k]/4)) |
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86 | |
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87 | z = o*(x-(shelf[i]+slope[k]))*(x-(shelf[i]+slope[k]))-5125-10 |
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88 | S = len (x) |
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89 | for j in range(S): |
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90 | |
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91 | if x[j] < shelf[i]: |
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92 | z[j] = -125/(shelf[i]*shelf[i])*x[j]*x[j]-10 |
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93 | |
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94 | elif shelf[i] <= x[j] < (shelf[i]+slope[k]*0.5) : |
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95 | z[j] = (-o)*(x[j]-shelf[i])*(x[j]-shelf[i])-125-10 |
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96 | |
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97 | return z |
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98 | |
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99 | |
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100 | |
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101 | domain.set_quantity('elevation', topography) # Use function for elevation |
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102 | domain.set_quantity('friction', 0) # Constant friction |
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103 | domain.set_quantity('stage', 0) # Constant negative initial stage |
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104 | domain.tight_slope_limiters = 1 |
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105 | |
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106 | #------------------------------------------------------------------------------ |
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107 | # Setup boundary conditions |
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108 | #------------------------------------------------------------------------------ |
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109 | |
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110 | from math import sin, pi, exp, cos, sqrt, cosh |
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111 | Br = Reflective_boundary(domain) # Solid reflective wall |
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112 | Bt = Transmissive_boundary(domain) # Continue all values on boundary |
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113 | Bd = Dirichlet_boundary([0.,0.,0.]) # Constant boundary values |
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114 | |
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115 | g = 9.81 |
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116 | offshore_depth = 5145 |
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117 | H_d_ratio = 0.0004 |
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118 | Xo = 100000 |
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119 | po = 130 |
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120 | def waveform(t): |
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121 | return wave[l]*offshore_depth*(sqrt(g/offshore_depth)*t-Xo/offshore_depth)*sqrt(H_d_ratio*po)*H_d_ratio/cosh(sqrt(3*H_d_ratio*po/4)*(sqrt(g/offshore_depth)*t-Xo/offshore_depth))/cosh(sqrt(3*H_d_ratio*po/4)*(sqrt(g/offshore_depth)*t-Xo/offshore_depth)) |
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122 | |
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123 | Bf = Transmissive_Momentum_Set_Stage_boundary(domain, waveform) |
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124 | # Associate boundary tags with boundary objects |
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125 | domain.set_boundary({'left': Bd, 'right': Bf, 'top': Br, 'bottom': Br}) |
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126 | |
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127 | |
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128 | #------------------------------------------------------------------------------ |
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129 | # Evolve system through time |
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130 | #------------------------------------------------------------------------------ |
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131 | |
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132 | for t in domain.evolve(yieldstep = 45, finaltime = (length/25)+2700+((length/50000)+1)*600+((shelf[i]/25000+1)*1000)): |
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133 | domain.write_time() |
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134 | for t in domain.evolve(yieldstep = 120, finaltime = (length/25)+2700+((length/50000)+1)*600+((shelf[i]/25000+1)*1000), |
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135 | skip_initial_step = True): |
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136 | domain.write_time() |
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137 | |
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138 | from anuga.shallow_water.data_manager import sww2dem |
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139 | from os import sep |
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140 | |
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141 | name = 'wave_value_tester_900a' |
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142 | time_dir = str(name)+'_'+str(wave[l])+'_50000_150000' |
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143 | cellsize = 50 |
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144 | timestep = None |
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145 | output_dir = sep+'d'+sep+'sim'+sep+'1'+sep+'mpittard'+sep+'idealised_bathymetry_study'+sep+'wave_value_testers'+sep |
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146 | directory = output_dir |
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147 | name = directory+time_dir+sep+str(name) |
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148 | is_parallel = False |
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149 | if is_parallel == True: nodes = 4 |
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150 | print 'output dir:', name |
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151 | |
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152 | #var = [0,2,3] # stage, depth and speed |
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153 | var = [0] |
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154 | |
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155 | for which_var in var: |
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156 | if which_var == 0: # Stage |
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157 | outname = name + '_stage' |
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158 | quantityname = 'stage' |
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159 | |
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160 | if which_var == 1: # Absolute Momentum |
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161 | outname = name + '_momentum_i1' |
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162 | quantityname = '(xmomentum**2 + ymomentum**2)**0.5' |
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163 | |
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164 | if which_var == 2: # Depth |
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165 | outname = name + '_depth' |
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166 | quantityname = 'stage-elevation' |
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167 | |
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168 | if which_var == 3: # Speed |
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169 | outname = name + '_speed' |
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170 | quantityname = '(xmomentum**2 + ymomentum**2)**0.5/(stage-elevation+1.e-6/(stage-elevation))' #Speed |
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171 | |
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172 | if which_var == 4: # Elevation |
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173 | outname = name + '_elevation' |
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174 | quantityname = 'elevation' #Elevation |
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175 | |
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176 | if is_parallel == True: |
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177 | # print 'is_parallel',is_parallel |
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178 | for i in range(0,nodes): |
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179 | namei = name + '_P%d_%d' %(i,nodes) |
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180 | outnamei = outname + '_P%d_%d' %(i,nodes) |
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181 | print 'start sww2dem for sww file %d' %(i) |
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182 | sww2dem(namei, basename_out = outnamei, |
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183 | quantity = quantityname, |
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184 | timestep = timestep, |
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185 | cellsize = cellsize, |
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186 | easting_min = 0, |
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187 | easting_max = 150000, |
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188 | northing_min = 0, |
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189 | northing_max = 400, |
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190 | reduction = max, |
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191 | verbose = True, |
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192 | format = 'asc') |
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193 | else: |
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194 | print 'start sww2dem' |
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195 | sww2dem(name, basename_out = outname, |
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196 | quantity = quantityname, |
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197 | timestep = timestep, |
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198 | cellsize = cellsize, |
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199 | ## easting_min = 0, |
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200 | ## easting_max = 150000, |
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201 | ## northing_min = 0, |
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202 | ## northing_max = 400, |
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203 | reduction = max, |
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204 | verbose = True, |
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205 | format = 'asc') |
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206 | |
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