1 | """ |
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2 | |
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3 | Ole Check Culvert Routine from Line 258 |
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4 | |
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5 | Although it is Setup as a Culvert with the Opening presented vertically, |
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6 | for now the calculation of flow rate is assuming a horizontal hole in the |
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7 | ground (Fix this Later) |
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8 | |
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9 | MOST importantly 2 things... |
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10 | 1. How to use the Create Polygon Routine to enquire Depth ( or later energy) |
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11 | infront of the Culvert |
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12 | |
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13 | Done (Ole) |
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14 | |
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15 | 2. How to apply the Culvert velocity and thereby Momentum to the Outlet |
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16 | Ject presented at the Outlet |
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17 | |
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18 | |
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19 | |
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20 | Testing CULVERT (Changing from Horizontal Abstraction to Vertical Abstraction |
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21 | |
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22 | This Version CALCULATES the Culvert Velocity and Uses it to establish |
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23 | The Culvert Outlet Momentum |
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24 | |
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25 | The Aim is to define a Flow Transfer function that Simulates a Culvert |
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26 | by using the Total Available Energy to Drive the Culvert |
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27 | as Derived by determining the Difference in Total Energy |
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28 | between 2 Points, Just Up stream and Just Down Stream of the Culvert |
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29 | away from the influence of the Flow Abstraction etc.. |
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30 | |
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31 | This example includes a Model Topography that shows a |
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32 | TYPICAL Headwall Configuration |
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33 | |
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34 | The aim is to change the Culvert Routine to Model more precisely the |
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35 | abstraction |
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36 | from a vertical face. |
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37 | |
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38 | The inflow must include the impact of Approach velocity. |
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39 | Similarly the Outflow has MOMENTUM Not just Up welling as in the |
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40 | Horizontal Style |
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41 | abstraction |
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42 | |
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43 | """ |
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44 | |
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45 | #------------------------------------------------------------------------------ |
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46 | # Import necessary modules |
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47 | #------------------------------------------------------------------------------ |
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48 | from anuga.abstract_2d_finite_volumes.mesh_factory import rectangular_cross |
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49 | from anuga.shallow_water import Domain |
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50 | from anuga.shallow_water.shallow_water_domain import Reflective_boundary |
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51 | from anuga.shallow_water.shallow_water_domain import Dirichlet_boundary |
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52 | from anuga.shallow_water.shallow_water_domain import Inflow, General_forcing |
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53 | from anuga.culvert_flows.culvert_polygons import create_culvert_polygons |
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54 | from anuga.utilities.polygon import plot_polygons |
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55 | |
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56 | from math import pi,sqrt |
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57 | |
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58 | #------------------------------------------------------------------------------ |
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59 | # Setup computational domain |
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60 | #------------------------------------------------------------------------------ |
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61 | |
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62 | |
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63 | # Open file for storing some specific results... |
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64 | fid = open('Culvert_Headwall_VarM.txt', 'w') |
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65 | |
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66 | length = 40. |
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67 | width = 5. |
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68 | |
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69 | #dx = dy = 1 # Resolution: Length of subdivisions on both axes |
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70 | #dx = dy = .5 # Resolution: Length of subdivisions on both axes |
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71 | dx = dy = .25 # Resolution: Length of subdivisions on both axes |
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72 | #dx = dy = .1 # Resolution: Length of subdivisions on both axes |
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73 | |
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74 | # OLE.... How do I refine the resolution... in the area where I have the Culvert Opening ???...... |
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75 | # Can I refine in a X & Y Range ??? |
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76 | points, vertices, boundary = rectangular_cross(int(length/dx), int(width/dy), |
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77 | len1=length, len2=width) |
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78 | domain = Domain(points, vertices, boundary) |
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79 | domain.set_name('culvert_HW_Var_Mom') # Output name |
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80 | domain.set_default_order(2) |
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81 | domain.H0 = 0.01 |
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82 | domain.tight_slope_limiters = True |
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83 | domain.set_minimum_storable_height(0.02) |
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84 | print 'Size', len(domain) |
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85 | |
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86 | |
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87 | #------------------------------------------------------------------------------ |
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88 | # Setup initial conditions |
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89 | #------------------------------------------------------------------------------ |
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90 | |
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91 | # Define the topography (land scape) |
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92 | def topography(x, y): |
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93 | """Set up a weir |
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94 | |
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95 | A culvert will connect either side of an Embankment with a Headwall type structure |
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96 | The aim is for the Model to REALISTICALY model flow through the Culvert |
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97 | """ |
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98 | # General Slope of Topography |
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99 | z=-x/100 |
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100 | |
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101 | # Add bits and Pieces to topography |
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102 | N = len(x) |
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103 | for i in range(N): |
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104 | |
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105 | # Sloping Embankment Across Channel |
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106 | if 5.0 < x[i] < 10.1: |
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107 | if 1.0+(x[i]-5.0)/5.0 < y[i] < 4.0 - (x[i]-5.0)/5.0: # Cut Out Segment for Culvert FACE |
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108 | z[i]=z[i] |
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109 | else: |
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110 | z[i] += 0.5*(x[i] -5.0) # Sloping Segment U/S Face |
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111 | if 10.0 < x[i] < 12.1: |
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112 | z[i] += 2.5 # Flat Crest of Embankment |
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113 | if 12.0 < x[i] < 14.5: |
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114 | if 2.0-(x[i]-12.0)/2.5 < y[i] < 3.0 + (x[i]-12.0)/2.5: # Cut Out Segment for Culvert FACE |
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115 | z[i]=z[i] |
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116 | else: |
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117 | z[i] += 2.5-1.0*(x[i] -12.0) # Sloping D/S Face |
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118 | |
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119 | |
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120 | # Constriction |
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121 | #if 27 < x[i] < 29 and y[i] > 3: |
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122 | # z[i] += 2 |
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123 | |
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124 | # Pole |
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125 | #if (x[i] - 34)**2 + (y[i] - 2)**2 < 0.4**2: |
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126 | # z[i] += 2 |
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127 | |
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128 | # HOLE For Pit at Opening[0] |
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129 | #if (x[i]-4)**2 + (y[i]-1.5)**2<0.75**2: |
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130 | # z[i]-=1 |
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131 | |
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132 | # HOLE For Pit at Opening[1] |
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133 | #if (x[i]-20)**2 + (y[i]-3.5)**2<0.5**2: |
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134 | # z[i]-=1 |
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135 | |
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136 | return z |
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137 | |
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138 | |
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139 | domain.set_quantity('elevation', topography) # Use function for elevation |
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140 | domain.set_quantity('friction', 0.01) # Constant friction |
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141 | domain.set_quantity('stage', |
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142 | expression='elevation') # Dry initial condition |
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143 | |
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144 | |
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145 | |
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146 | |
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147 | #------------------------------------------------------------------------------ |
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148 | # Setup specialised forcing terms |
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149 | #------------------------------------------------------------------------------ |
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150 | |
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151 | # NEW DEFINED CULVERT FLOW---- Flow from INLET 1 ------> INLET 2 (Outlet) |
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152 | # |
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153 | # The First Attempt has a Simple Horizontal Circle as a Hole on the Bed |
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154 | # Flow Is Removed at a Rate of INFLOW |
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155 | # Downstream there is a similar Circular Hole on the Bed where INFLOW effectively Surcharges |
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156 | # |
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157 | # This SHould be changed to a Verical Opening Both BOX and Circular |
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158 | # There will be several Culvert Routines such as: |
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159 | # CULVERT_Simple_FLOOR |
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160 | # CULVERT_Simple_WALL |
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161 | # CULVERT_Eqn_Floor |
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162 | # CULVERT_Eqn_Wall |
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163 | # CULVERT_Tab_Floor |
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164 | # CULVERT_Tab_Wall |
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165 | # BRIDGES..... |
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166 | # NOTE NEED TO DEVELOP CONCEPT 1D Model for Linked Pipe System !!!! |
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167 | |
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168 | # COULD USE EPA SWMM Model !!!! |
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169 | |
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170 | |
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171 | |
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172 | class Culvert_flow: |
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173 | """Culvert flow - transfer water from one hole to another |
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174 | |
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175 | Using Momentum as Calculated by Culvert Flow !! |
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176 | Could be Several Methods Investigated to do This !!! |
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177 | |
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178 | 2008_May_08 |
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179 | To Ole: |
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180 | OK so here we need to get the Polygon Creating code to create polygons for the culvert Based on |
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181 | the two input Points (X0,Y0) and (X1,Y1) - need to be passed to create polygon |
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182 | |
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183 | The two centers are now passed on to create_polygon. |
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184 | |
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185 | |
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186 | Input: Two points, pipe_size (either diameter or width, height), mannings_rougness, |
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187 | inlet/outlet energy_loss_coefficients, internal_bend_coefficent, |
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188 | top-down_blockage_factor and bottom_up_blockage_factor |
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189 | |
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190 | |
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191 | And the Delta H enquiry should be change from Openings in line 412 to the enquiry Polygons infront |
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192 | of the culvert |
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193 | At the moment this script uses only Depth, later we can change it to Energy... |
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194 | |
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195 | Once we have Delta H can calculate a Flow Rate and from Flow Rate an Outlet Velocity |
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196 | The Outlet Velocity x Outlet Depth = Momentum to be applied at the Outlet... |
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197 | |
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198 | """ |
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199 | |
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200 | def __init__(self, |
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201 | domain, |
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202 | end_point0=None, |
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203 | end_point1=None, |
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204 | width=None, |
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205 | height=None, |
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206 | verbose=False): |
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207 | |
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208 | from Numeric import sqrt, sum |
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209 | |
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210 | if height is None: height = width |
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211 | |
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212 | # Create the fundamental culvert polygons |
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213 | P = create_culvert_polygons(end_point0, |
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214 | end_point1, |
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215 | width=width, |
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216 | height=height) |
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217 | |
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218 | if verbose is True: |
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219 | pass |
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220 | #plot_polygons([[end_point0, end_point1], |
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221 | # P['exchange_polygon0'], |
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222 | # P['exchange_polygon1'], |
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223 | # P['enquiry_polygon0'], |
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224 | # P['enquiry_polygon1']], |
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225 | # figname='culvert_polygon_output') |
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226 | |
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227 | self.openings = [] |
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228 | self.openings.append(Inflow(domain, |
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229 | polygon=P['exchange_polygon0'])) |
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230 | |
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231 | self.openings.append(Inflow(domain, |
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232 | polygon=P['exchange_polygon1'])) |
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233 | |
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234 | |
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235 | # Assume two openings for now: Referred to as 0 and 1 |
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236 | assert len(self.openings) == 2 |
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237 | |
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238 | # Store basic geometry |
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239 | self.end_points = [end_point0, end_point1] |
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240 | self.enquiry_polygons = [P['enquiry_polygon0'], P['enquiry_polygon1']] |
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241 | self.vector = P['vector'] |
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242 | self.distance = P['length'] |
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243 | self.verbose = verbose |
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244 | self.width = width |
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245 | self.height = height |
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246 | self.last_time = 0.0 |
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247 | |
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248 | # Create objects to update momentum (a bit crude at this stage) |
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249 | self.xmom_forcing0 = General_forcing(domain, |
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250 | 'xmomentum', |
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251 | polygon=P['exchange_polygon0']) |
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252 | |
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253 | self.xmom_forcing1 = General_forcing(domain, |
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254 | 'xmomentum', |
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255 | polygon=P['exchange_polygon1']) |
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256 | |
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257 | self.ymom_forcing0 = General_forcing(domain, |
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258 | 'ymomentum', |
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259 | polygon=P['exchange_polygon0']) |
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260 | |
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261 | self.ymom_forcing1 = General_forcing(domain, |
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262 | 'ymomentum', |
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263 | polygon=P['exchange_polygon1']) |
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264 | |
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265 | # Print something |
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266 | |
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267 | print 'Culvert Effective Length =', self.distance |
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268 | print 'Culvert Slope is Delta Z / Dist' |
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269 | print 'Culvert Direction is ', self.vector |
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270 | print 'Point 1m Up Stream is X,Y =' |
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271 | print 'Point 1m Down Stream is X,Y =' |
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272 | |
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273 | |
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274 | |
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275 | def __call__(self, domain): |
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276 | from anuga.utilities.numerical_tools import mean |
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277 | from anuga.utilities.polygon import inside_polygon |
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278 | from anuga.config import g, epsilon |
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279 | from Numeric import take, sqrt |
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280 | |
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281 | |
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282 | # Get average water depths at each opening |
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283 | |
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284 | |
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285 | time = domain.get_time() |
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286 | openings = self.openings |
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287 | for i, opening in enumerate(openings): |
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288 | # Quantities corresponding to fluid exchange field for this opening |
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289 | stage_o = domain.quantities['stage'].get_values(location='centroids', |
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290 | indices=opening.indices) |
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291 | elevation_o = domain.quantities['elevation'].get_values(location='centroids', |
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292 | indices=opening.indices) |
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293 | xmomentum_o = domain.quantities['xmomentum'].get_values(location='centroids', |
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294 | indices=opening.indices) |
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295 | ymomentum_o = domain.quantities['xmomentum'].get_values(location='centroids', |
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296 | indices=opening.indices) |
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297 | |
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298 | # Compute mean velocity in the exchange area in front of the culvert (taking zero depths into account) |
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299 | depth_o = stage_o - elevation_o |
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300 | |
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301 | ux_o = xmomentum_o/(depth_o+epsilon) |
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302 | uy_o = ymomentum_o/(depth_o+epsilon) |
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303 | v_o = mean(sqrt(ux_o**2+uy_o**2)) |
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304 | d_o = mean(depth_o) |
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305 | w_o = mean(stage_o) |
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306 | z_o = mean(elevation_o) |
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307 | self.mean_xmomentum_o = mean(xmomentum_o) |
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308 | self.mean_ymomentum_o = mean(ymomentum_o) |
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309 | |
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310 | # Indices corresponding to energy enquiry field for this opening |
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311 | coordinates = domain.get_centroid_coordinates() # Get all centroid points (x,y) |
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312 | idx = inside_polygon(coordinates, self.enquiry_polygons[i]) |
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313 | |
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314 | if self.verbose: |
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315 | pass |
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316 | #print 'Opening %d: Got %d points in enquiry polygon:\n%s'\ |
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317 | # %(i, len(idx), self.enquiry_polygons[i]) |
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318 | |
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319 | |
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320 | # Get average model values for points in |
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321 | # enquiry polygon for this opening |
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322 | dq = domain.quantities |
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323 | stage = dq['stage'].get_values(location='centroids', indices=idx) |
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324 | xmomentum = dq['xmomentum'].get_values(location='centroids', indices=idx) |
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325 | ymomentum = dq['ymomentum'].get_values(location='centroids', indices=idx) |
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326 | elevation = dq['elevation'].get_values(location='centroids', indices=idx) |
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327 | depth = stage - elevation |
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328 | |
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329 | # Compute mean velocity in the area in front of the culvert (taking zero depths into account) |
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330 | ux = xmomentum/(depth+epsilon) |
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331 | uy = ymomentum/(depth+epsilon) |
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332 | v = mean(sqrt(ux**2+uy**2)) |
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333 | d = mean(depth) |
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334 | w = mean(stage) |
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335 | z = mean(elevation) |
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336 | self.mean_xmomentum = mean(xmomentum) |
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337 | self.mean_ymomentum = mean(ymomentum) |
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338 | |
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339 | # Ratio of depth to culvert height |
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340 | ratio = d/(2*self.height) |
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341 | if ratio > 1.0: # Assume culvert is running full & |
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342 | ratio = 1.0 # under pressure. Note this is usually ~ 1.35 |
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343 | opening.ratio = ratio |
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344 | |
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345 | |
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346 | # Average measure of total energy (D + V^2/2g) in enquiry field in front of this opening |
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347 | E = d + 0.5*v**2/g # RUDY - please check this |
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348 | opening.energy = E |
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349 | |
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350 | |
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351 | |
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352 | # Store current average stage and depth at enquiry field with each opening object |
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353 | opening.depth = d |
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354 | opening.stage = w |
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355 | opening.elevation = z |
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356 | |
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357 | |
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358 | # Now we are done calculating energy etc for each opening. |
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359 | # At this point we can work on the transfer functions etc. |
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360 | |
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361 | # Handy values (all calculated at enquiry polygon - |
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362 | # if you need them at exchange polygons we can easily do that.) |
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363 | delta_h = openings[1].stage - openings[0].stage |
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364 | #delta_h = openings[1].depth - openings[0].depth |
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365 | delta_z = openings[1].elevation - openings[0].elevation |
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366 | |
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367 | # Ideas..... |
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368 | if openings[0].depth > 0 and openings[1].depth > 0: |
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369 | flow_rate = delta_h |
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370 | else: |
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371 | flow_rate = 0.0 |
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372 | |
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373 | if openings[0].depth > self.height: |
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374 | # This could be usefull mayby |
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375 | #print 'Inlet has been overflowed' |
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376 | pass |
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377 | |
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378 | if openings[1].depth > self.height: |
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379 | # This could be usefull mayby |
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380 | #print 'Outlet has been overflowed' |
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381 | pass |
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382 | |
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383 | |
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384 | if delta_h > 0: |
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385 | # Water Level U/S is higher than DS |
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386 | flow_rate_orifice = 0.6*openings[0].area*(2*g*delta_h)**0.5 # Orifice Eqn Q= cA(2gh)^0.5 |
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387 | flow_rate_weir = 1.69*(openings[0].area)*openings[0].depth**1.5 # WEIR Eqn Q= CLH^1.5 |
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388 | |
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389 | # Does Weir or Orifice Control Flow Rate ? |
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390 | if flow_rate_weir > flow_rate_orifice: |
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391 | flow_rate_control = flow_rate_orifice |
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392 | else: |
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393 | flow_rate_control = flow_rate_weir |
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394 | |
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395 | elif delta_h < 0: |
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396 | # Water Level D/S is higher than US |
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397 | # That is reverse flow in culvert |
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398 | flow_rate_orifice = 0.6*openings[0].area*(2*g*-delta_h)**0.5 # Orifice Eqn Q= cA(2gh)^0.5 |
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399 | flow_rate_weir = 1.69*openings[0].area*openings[0].depth**1.5 # WEIR Eqn Q= CLH^1.5 |
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400 | |
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401 | # Does Weir or Orifice Control Flow Rate ? |
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402 | if flow_rate_weir > flow_rate_orifice: |
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403 | flow_rate_control = flow_rate_orifice |
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404 | else: |
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405 | flow_rate_control = flow_rate_weir |
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406 | |
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407 | if openings[0].depth < epsilon: |
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408 | # Do nothing because No water over Opening That is Set Flow to Zero!! |
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409 | self.openings[0].rate = 0 |
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410 | self.openings[1].rate = 0 |
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411 | |
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412 | elif openings[0].depth > 0: |
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413 | # Only calculate fllow if there is some depth over the inlet |
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414 | #if delta_h > 0: |
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415 | if 1: |
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416 | # FIXME (OLE): We never get in here. Why? |
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417 | |
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418 | #print 'We got water at inlet and dh > 0' |
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419 | |
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420 | # Flow will go from opening 0 to opening 1 |
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421 | #- that is abstract from [0] and add to [1] |
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422 | self.openings[0].rate = -flow_rate_control |
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423 | self.openings[1].rate = flow_rate_control |
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424 | |
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425 | # Add jet in the form of absolute momentum to opening 1 |
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426 | #speed = 20.0 # m/s |
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427 | # This Should be Based on the VELOCITY in the Culvert |
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428 | # Based on the Flow Depth in the Culvert for part full |
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429 | # or Flow Jet of the Pressurised Culvert if FUll |
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430 | # If Part Full Flow Calculate Part Full Depth |
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431 | # Based on Depth Calculate Area... the Vel = flow_rate_control / Area |
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432 | # Need to Break Velocity into X & Y Components |
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433 | #self.openings[1].set_quantity_values(delta_h*speed, 'xmomentum') |
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434 | # Previous Calculated Depth/ Culvert Heigh Ratio Use it to Determine Velocity !!!! FIX LAter |
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435 | |
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436 | #if (ratio*self.area)== 0: # Don't Really need this already established water depth here |
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437 | # outlet_vel=0.0 |
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438 | #else: |
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439 | |
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440 | |
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441 | # FIXME (Ole): Shouldn't this be openings[1]?? |
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442 | outlet_vel =(flow_rate_control/(openings[0].ratio*openings[0].area)) |
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443 | outlet_dep = 2.0*openings[0].depth*openings[0].ratio #????? |
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444 | outlet_mom = outlet_vel*outlet_dep |
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445 | |
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446 | |
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447 | # Eventually will Need Momentum in X & Y Components based on the orientation of |
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448 | # the culvert from X0,Y0, X1, Y1 from Create Polygon Routine |
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449 | # YES - use self.vector which is a unit vector in the direction of the culvert. |
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450 | |
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451 | outlet_mom_x, outlet_mom_y = self.vector * outlet_mom |
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452 | #print 'Directional momentum', outlet_mom_x, outlet_mom_y |
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453 | |
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454 | # Update the momentum forcing terms with directional momentum at the outlet |
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455 | delta_t = time - self.last_time |
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456 | if delta_t > 0.0: |
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457 | xmomentum_rate = outlet_mom_x - self.mean_xmomentum |
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458 | if xmomentum_rate > 0: |
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459 | xmomentum_rate /= delta_t |
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460 | else: |
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461 | xmomentum_rate = 0.0 |
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462 | |
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463 | ymomentum_rate = outlet_mom_y - self.mean_ymomentum |
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464 | if ymomentum_rate > 0: |
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465 | ymomentum_rate /= delta_t |
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466 | else: |
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467 | ymomentum_rate = 0.0 |
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468 | else: |
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469 | xmomentum_rate = ymomentum_rate = 0.0 |
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470 | |
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471 | # Set momentum rates for outlet jet |
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472 | self.xmom_forcing1.rate = xmomentum_rate |
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473 | self.ymom_forcing1.rate = ymomentum_rate |
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474 | |
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475 | # Remember this value for next step (IMPORTANT) |
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476 | self.xmom_forcing1.value = outlet_mom_x |
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477 | self.ymom_forcing1.value = outlet_mom_y |
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478 | |
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479 | |
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480 | if int(time*100) % 100 == 0: |
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481 | s = 'T=%.3f, Culvert Discharge = %.3f Culv. Vel. %0.3f'\ |
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482 | %(time, flow_rate_control, outlet_vel) |
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483 | s += ' Depth= %0.3f\n Outlet Momentum = (%0.3f, %0.3f)\n'\ |
---|
484 | %(outlet_dep, outlet_mom_x, outlet_mom_y) |
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485 | s += ' Avg Momentum at opening = (%0.3f, %0.3f)\n'\ |
---|
486 | %(self.mean_xmomentum_o, self.mean_ymomentum_o) |
---|
487 | s += ' Avg Momentum in enquiry = (%0.3f, %0.3f)\n'\ |
---|
488 | %(self.mean_xmomentum, self.mean_ymomentum) |
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489 | s += ' Momentum rate: (%.4f, %.4f)'\ |
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490 | %(xmomentum_rate, ymomentum_rate) |
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491 | fid.write(s) |
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492 | print s |
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493 | else: |
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494 | # Opening 1 has the greatest depth. Therefore Reverse the Flow !!! |
---|
495 | # Flow will go from opening 1 to opening 0, That is Abstract from [1] and add to [0] |
---|
496 | self.openings[0].rate = flow_rate_control # Else it will be Orifice Flow (Going US) |
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497 | self.openings[1].rate = -flow_rate_control |
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498 | |
---|
499 | # Second Else.... if water at outlet before at inlet !!! |
---|
500 | |
---|
501 | |
---|
502 | self.openings[1].rate = 10 |
---|
503 | # Execute flow term for each opening |
---|
504 | # This is where Inflow objects are evaluated and update the domain |
---|
505 | for opening in self.openings: |
---|
506 | opening(domain) |
---|
507 | |
---|
508 | # Execute momentum terms |
---|
509 | # This is where Inflow objects are evaluated and update the domain |
---|
510 | self.xmom_forcing0(domain) |
---|
511 | self.ymom_forcing0(domain) |
---|
512 | self.xmom_forcing1(domain) |
---|
513 | self.ymom_forcing1(domain) |
---|
514 | |
---|
515 | |
---|
516 | |
---|
517 | # Print out flows every 1 seconds |
---|
518 | if int(time*100) % 100 == 0: |
---|
519 | s = 'Time %.3f\n' %time |
---|
520 | s += ' Opening[0]: d=%.3f, A=%.3f, E=%.3f, r=%.3f\n'\ |
---|
521 | %(openings[0].depth, |
---|
522 | openings[0].area, |
---|
523 | openings[0].energy, |
---|
524 | openings[0].ratio) |
---|
525 | s += ' Opening[1]: d=%.3f, A=%.3f, E=%.3f, r=%.3f\n'\ |
---|
526 | %(openings[1].depth, |
---|
527 | openings[1].area, |
---|
528 | openings[1].energy, |
---|
529 | openings[1].ratio) |
---|
530 | s += ' Distance=%.2f, W=%.3f, O=%.3f, C=%.3f\n'\ |
---|
531 | %(self.distance, |
---|
532 | flow_rate_weir, |
---|
533 | flow_rate_orifice, |
---|
534 | flow_rate_control) |
---|
535 | |
---|
536 | print s |
---|
537 | |
---|
538 | fid.write(s) |
---|
539 | |
---|
540 | # Store value of time |
---|
541 | self.last_time = time |
---|
542 | |
---|
543 | #------------------------------------------------------------------------------ |
---|
544 | # Setup culvert inlets and outlets in current topography |
---|
545 | #------------------------------------------------------------------------------ |
---|
546 | |
---|
547 | # Define culvert inlet and outlets |
---|
548 | culvert = Culvert_flow(domain, |
---|
549 | end_point0=[9.0, 2.5], |
---|
550 | end_point1=[13.0, 2.5], |
---|
551 | width=1.00, |
---|
552 | verbose=True) |
---|
553 | |
---|
554 | domain.forcing_terms.append(culvert) |
---|
555 | |
---|
556 | |
---|
557 | #------------------------------------------------------------------------------ |
---|
558 | # Setup boundary conditions |
---|
559 | #------------------------------------------------------------------------------ |
---|
560 | #Bi = Dirichlet_boundary([0.5, 0.0, 0.0]) # Inflow based on Flow Depth (0.5m) and Approaching Momentum !!! |
---|
561 | Bi = Dirichlet_boundary([0.0, 0.0, 0.0]) # Inflow based on Flow Depth and Approaching Momentum !!! |
---|
562 | Br = Reflective_boundary(domain) # Solid reflective wall |
---|
563 | Bo = Dirichlet_boundary([-5, 0, 0]) # Outflow |
---|
564 | |
---|
565 | domain.set_boundary({'left': Br, 'right': Bo, 'top': Br, 'bottom': Br}) |
---|
566 | |
---|
567 | #------------------------------------------------------------------------------ |
---|
568 | # Setup Application of specialised forcing terms |
---|
569 | #------------------------------------------------------------------------------ |
---|
570 | |
---|
571 | # This is the new element implemented by Ole to allow direct input of Inflow in m^3/s |
---|
572 | fixed_flow = Inflow(domain, |
---|
573 | rate=6.00, |
---|
574 | center=(2.1, 2.1), |
---|
575 | radius=1.261566) # Fixed Flow Value Over Area of 5m2 at 1m/s = 5m^3/s |
---|
576 | |
---|
577 | # flow=file_function('Q/QPMF_Rot_Sub13.tms')) # Read Time Series in from File |
---|
578 | # flow=lambda t: min(0.01*t, 0.01942)) # Time Varying Function Tap turning up |
---|
579 | |
---|
580 | domain.forcing_terms.append(fixed_flow) |
---|
581 | |
---|
582 | |
---|
583 | #------------------------------------------------------------------------------ |
---|
584 | # Evolve system through time |
---|
585 | #------------------------------------------------------------------------------ |
---|
586 | |
---|
587 | |
---|
588 | |
---|
589 | for t in domain.evolve(yieldstep = 0.1, finaltime = 10): |
---|
590 | pass |
---|
591 | #if int(domain.time*100) % 100 == 0: |
---|
592 | # domain.write_time() |
---|
593 | |
---|
594 | #if domain.get_time() >= 4 and tap.rate != 0.0: |
---|
595 | # print 'Turning tap off' |
---|
596 | # tap.rate = 0.0 |
---|
597 | |
---|
598 | #if domain.get_time() >= 3 and sink.rate < 0.0: |
---|
599 | # print 'Turning drain on' |
---|
600 | # sink.rate = -0.8 |
---|
601 | # Close |
---|
602 | |
---|
603 | fid.close() |
---|
604 | |
---|
605 | |
---|
606 | #------------------------------------------------------------------------------ |
---|
607 | # Query output |
---|
608 | #------------------------------------------------------------------------------ |
---|
609 | |
---|
610 | from anuga.shallow_water.data_manager import get_flow_through_cross_section |
---|
611 | |
---|
612 | swwfilename = domain.get_name()+'.sww' # Output name from script |
---|
613 | print swwfilename |
---|
614 | |
---|
615 | polyline = [[17., 0.], [17., 5.]] |
---|
616 | |
---|
617 | time, Q = get_flow_through_cross_section(swwfilename, polyline, verbose=True) |
---|
618 | |
---|
619 | from pylab import ion, plot |
---|
620 | ion() |
---|
621 | plot(time, Q) |
---|
622 | raw_input('done') |
---|