1 | from anuga.geometry.polygon import inside_polygon, polygon_area |
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2 | from anuga.config import g |
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3 | import anuga.utilities.log as log |
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4 | |
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5 | from boyd_box_culvert import Boyd_box_culvert |
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6 | |
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7 | class Culvert_operator: |
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8 | """Culvert flow - transfer water from one rectangular box to another. |
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9 | Sets up the geometry of problem |
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10 | |
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11 | This is the base class for culverts. Inherit from this class (and overwrite |
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12 | compute_discharge method for specific subclasses) |
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13 | |
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14 | Input: Two points, pipe_size (either diameter or width, height), |
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15 | mannings_rougness, |
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16 | """ |
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17 | |
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18 | def __init__(self, |
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19 | domain, |
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20 | end_point0, |
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21 | end_point1, |
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22 | width, |
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23 | height=None, |
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24 | verbose=False): |
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25 | |
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26 | self.domain = domain |
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27 | self.domain.set_fractional_step_operator(self) |
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28 | end_points = [end_point0, end_point1] |
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29 | |
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30 | if height is None: |
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31 | height = width |
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32 | |
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33 | self.width = width |
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34 | self.height = height |
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35 | |
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36 | self.culvert = Boyd_box_culvert(self.domain, end_points, self.width, self.height) |
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37 | print self.culvert |
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38 | self.routine = self.culvert.routine |
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39 | print self.routine |
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40 | self.inlets = self.culvert.get_inlets() |
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41 | |
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42 | self.print_stats() |
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43 | |
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44 | |
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45 | def __call__(self): |
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46 | |
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47 | timestep = self.domain.get_timestep() |
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48 | |
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49 | Q, barrel_speed, culvert_outlet_depth = self.routine() |
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50 | |
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51 | inflow = self.routine.get_inflow() |
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52 | outflow = self.routine.get_outflow() |
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53 | |
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54 | outflow_direction = - outflow.outward_culvert_vector |
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55 | |
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56 | outflow_momentum_flux = barrel_speed**2*culvert_outlet_depth*outflow_direction |
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57 | |
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58 | |
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59 | print Q, barrel_speed, culvert_outlet_depth, outflow_momentum_flux |
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60 | |
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61 | #FIXME (SR) Check whether we need to mult/divide by inlet area |
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62 | inflow_transfer = Q*timestep/inflow.get_area() |
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63 | |
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64 | outflow_transfer = Q*timestep/outflow.get_area() |
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65 | |
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66 | |
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67 | |
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68 | inflow.set_heights(inflow.get_average_height() - inflow_transfer) |
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69 | |
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70 | inflow.set_xmoms(0.0) |
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71 | inflow.set_ymoms(0.0) |
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72 | |
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73 | #u = outflow.get_xvelocities() |
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74 | #v = outflow.get_yvelocities() |
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75 | |
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76 | outflow.set_heights(outflow.get_average_height() + outflow_transfer) |
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77 | #outflow.set_xmoms(outflow.get_xmoms() + timestep*outflow_momentum_flux[0] ) |
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78 | #outflow.set_ymoms(outflow.get_ymoms() + timestep*outflow_momentum_flux[1] ) |
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79 | |
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80 | def print_stats(self): |
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81 | |
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82 | print '=====================================' |
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83 | print 'Generic Culvert Operator' |
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84 | print '=====================================' |
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85 | |
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86 | for i, inlet in enumerate(self.inlets): |
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87 | print '-------------------------------------' |
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88 | print 'Inlet %i' % i |
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89 | print '-------------------------------------' |
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90 | |
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91 | print 'inlet triangle indices and centres' |
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92 | print inlet.triangle_indices |
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93 | print self.domain.get_centroid_coordinates()[inlet.triangle_indices] |
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94 | |
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95 | print 'polygon' |
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96 | print inlet.polygon |
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97 | |
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98 | print '=====================================' |
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99 | |
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100 | |
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101 | # FIXME(Ole): Write in C and reuse this function by similar code |
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102 | # in interpolate.py |
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103 | def interpolate_linearly(x, xvec, yvec): |
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104 | |
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105 | msg = 'Input to function interpolate_linearly could not be converted ' |
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106 | msg += 'to numerical scalar: x = %s' % str(x) |
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107 | try: |
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108 | x = float(x) |
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109 | except: |
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110 | raise Exception, msg |
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111 | |
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112 | |
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113 | # Check bounds |
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114 | if x < xvec[0]: |
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115 | msg = 'Value provided = %.2f, interpolation minimum = %.2f.'\ |
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116 | % (x, xvec[0]) |
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117 | raise Below_interval, msg |
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118 | |
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119 | if x > xvec[-1]: |
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120 | msg = 'Value provided = %.2f, interpolation maximum = %.2f.'\ |
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121 | %(x, xvec[-1]) |
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122 | raise Above_interval, msg |
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123 | |
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124 | |
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125 | # Find appropriate slot within bounds |
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126 | i = 0 |
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127 | while x > xvec[i]: i += 1 |
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128 | |
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129 | |
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130 | x0 = xvec[i-1] |
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131 | x1 = xvec[i] |
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132 | alpha = (x - x0)/(x1 - x0) |
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133 | |
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134 | y0 = yvec[i-1] |
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135 | y1 = yvec[i] |
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136 | y = alpha*y1 + (1-alpha)*y0 |
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137 | |
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138 | return y |
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139 | |
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140 | |
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141 | |
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142 | def read_culvert_description(culvert_description_filename): |
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143 | |
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144 | # Read description file |
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145 | fid = open(culvert_description_filename) |
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146 | |
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147 | read_rating_curve_data = False |
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148 | rating_curve = [] |
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149 | for i, line in enumerate(fid.readlines()): |
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150 | |
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151 | if read_rating_curve_data is True: |
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152 | fields = line.split(',') |
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153 | head_difference = float(fields[0].strip()) |
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154 | flow_rate = float(fields[1].strip()) |
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155 | barrel_velocity = float(fields[2].strip()) |
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156 | |
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157 | rating_curve.append([head_difference, flow_rate, barrel_velocity]) |
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158 | |
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159 | if i == 0: |
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160 | # Header |
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161 | continue |
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162 | if i == 1: |
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163 | # Metadata |
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164 | fields = line.split(',') |
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165 | label=fields[0].strip() |
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166 | type=fields[1].strip().lower() |
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167 | assert type in ['box', 'pipe'] |
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168 | |
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169 | width=float(fields[2].strip()) |
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170 | height=float(fields[3].strip()) |
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171 | length=float(fields[4].strip()) |
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172 | number_of_barrels=int(fields[5].strip()) |
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173 | #fields[6] refers to losses |
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174 | description=fields[7].strip() |
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175 | |
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176 | if line.strip() == '': continue # Skip blanks |
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177 | |
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178 | if line.startswith('Rating'): |
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179 | read_rating_curve_data = True |
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180 | # Flow data follows |
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181 | |
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182 | fid.close() |
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183 | |
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184 | return label, type, width, height, length, number_of_barrels, description, rating_curve |
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185 | |
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