| 1 | from anuga.shallow_water.shallow_water_domain import Inflow, General_forcing |
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| 2 | from anuga.culvert_flows.culvert_polygons import create_culvert_polygons |
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| 3 | from anuga.utilities.system_tools import log_to_file |
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| 4 | from anuga.utilities.polygon import inside_polygon |
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| 5 | from anuga.utilities.polygon import is_inside_polygon |
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| 6 | from anuga.utilities.polygon import plot_polygons |
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| 7 | |
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| 8 | |
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| 9 | class Culvert_flow: |
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| 10 | """Culvert flow - transfer water from one hole to another |
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| 11 | |
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| 12 | Using Momentum as Calculated by Culvert Flow !! |
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| 13 | Could be Several Methods Investigated to do This !!! |
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| 14 | |
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| 15 | 2008_May_08 |
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| 16 | To Ole: |
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| 17 | OK so here we need to get the Polygon Creating code to create |
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| 18 | polygons for the culvert Based on |
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| 19 | the two input Points (X0,Y0) and (X1,Y1) - need to be passed |
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| 20 | to create polygon |
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| 21 | |
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| 22 | The two centers are now passed on to create_polygon. |
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| 23 | |
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| 24 | |
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| 25 | Input: Two points, pipe_size (either diameter or width, height), |
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| 26 | mannings_rougness, |
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| 27 | inlet/outlet energy_loss_coefficients, internal_bend_coefficent, |
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| 28 | top-down_blockage_factor and bottom_up_blockage_factor |
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| 29 | |
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| 30 | |
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| 31 | And the Delta H enquiry should be change from Openings in line 412 |
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| 32 | to the enquiry Polygons infront of the culvert |
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| 33 | At the moment this script uses only Depth, later we can change it to |
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| 34 | Energy... |
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| 35 | |
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| 36 | Once we have Delta H can calculate a Flow Rate and from Flow Rate |
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| 37 | an Outlet Velocity |
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| 38 | The Outlet Velocity x Outlet Depth = Momentum to be applied at the Outlet... |
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| 39 | |
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| 40 | Invert levels are optional. If left out they will default to the |
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| 41 | elevation at the opening. |
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| 42 | |
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| 43 | """ |
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| 44 | |
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| 45 | def __init__(self, |
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| 46 | domain, |
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| 47 | label=None, |
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| 48 | description=None, |
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| 49 | end_point0=None, |
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| 50 | end_point1=None, |
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| 51 | width=None, |
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| 52 | height=None, |
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| 53 | diameter=None, |
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| 54 | manning=None, # Mannings Roughness for Culvert |
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| 55 | invert_level0=None, # Invert level at opening 0 |
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| 56 | invert_level1=None, # Invert level at opening 1 |
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| 57 | loss_exit=None, |
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| 58 | loss_entry=None, |
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| 59 | loss_bend=None, |
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| 60 | loss_special=None, |
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| 61 | blockage_topdwn=None, |
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| 62 | blockage_bottup=None, |
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| 63 | culvert_routine=None, |
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| 64 | number_of_barrels=1, |
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| 65 | verbose=False): |
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| 66 | |
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| 67 | # Input check |
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| 68 | if diameter is not None: |
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| 69 | self.culvert_type = 'circle' |
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| 70 | self.diameter = diameter |
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| 71 | if height is not None or width is not None: |
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| 72 | msg = 'Either diameter or width&height must be specified, ' |
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| 73 | msg += 'but not both.' |
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| 74 | raise Exception, msg |
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| 75 | else: |
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| 76 | if height is not None: |
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| 77 | if width is None: |
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| 78 | self.culvert_type = 'square' |
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| 79 | width = height |
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| 80 | else: |
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| 81 | self.culvert_type = 'rectangle' |
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| 82 | elif width is not None: |
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| 83 | if height is None: |
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| 84 | self.culvert_type = 'square' |
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| 85 | height = width |
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| 86 | else: |
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| 87 | msg = 'Either diameter or width&height must be specified.' |
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| 88 | raise Exception, msg |
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| 89 | |
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| 90 | if height == width: |
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| 91 | self.culvert_type = 'square' |
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| 92 | |
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| 93 | self.height = height |
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| 94 | self.width = width |
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| 95 | |
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| 96 | |
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| 97 | assert self.culvert_type in ['circle', 'square', 'rectangle'] |
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| 98 | |
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| 99 | assert number_of_barrels >= 1 |
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| 100 | self.number_of_barrels = number_of_barrels |
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| 101 | |
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| 102 | |
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| 103 | # Set defaults |
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| 104 | if manning is None: manning = 0.012 # Default roughness for pipe |
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| 105 | if loss_exit is None: loss_exit = 1.00 |
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| 106 | if loss_entry is None: loss_entry = 0.50 |
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| 107 | if loss_bend is None: loss_bend=0.00 |
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| 108 | if loss_special is None: loss_special=0.00 |
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| 109 | if blockage_topdwn is None: blockage_topdwn=0.00 |
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| 110 | if blockage_bottup is None: blockage_bottup=0.00 |
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| 111 | if culvert_routine is None: |
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| 112 | culvert_routine=boyd_generalised_culvert_model |
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| 113 | |
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| 114 | if label is None: label = 'culvert_flow' |
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| 115 | label += '_' + str(id(self)) |
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| 116 | self.label = label |
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| 117 | |
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| 118 | # File for storing culvert quantities |
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| 119 | self.timeseries_filename = label + '_timeseries.csv' |
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| 120 | fid = open(self.timeseries_filename, 'w') |
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| 121 | fid.write('time, E0, E1, Velocity, Discharge\n') |
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| 122 | fid.close() |
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| 123 | |
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| 124 | # Log file for storing general textual output |
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| 125 | self.log_filename = label + '.log' |
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| 126 | log_to_file(self.log_filename, self.label) |
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| 127 | log_to_file(self.log_filename, description) |
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| 128 | log_to_file(self.log_filename, self.culvert_type) |
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| 129 | |
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| 130 | |
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| 131 | # Create the fundamental culvert polygons from POLYGON |
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| 132 | if self.culvert_type == 'circle': |
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| 133 | # Redefine width and height for use with create_culvert_polygons |
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| 134 | width = height = diameter |
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| 135 | |
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| 136 | P = create_culvert_polygons(end_point0, |
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| 137 | end_point1, |
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| 138 | width=width, |
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| 139 | height=height, |
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| 140 | number_of_barrels=number_of_barrels) |
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| 141 | |
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| 142 | if verbose is True: |
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| 143 | pass |
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| 144 | #plot_polygons([[end_point0, end_point1], |
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| 145 | # P['exchange_polygon0'], |
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| 146 | # P['exchange_polygon1'], |
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| 147 | # P['enquiry_polygon0'], |
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| 148 | # P['enquiry_polygon1']], |
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| 149 | # figname='culvert_polygon_output') |
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| 150 | #import sys; sys.exit() |
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| 151 | |
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| 152 | |
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| 153 | # Check that all polygons lie within the mesh. |
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| 154 | bounding_polygon = domain.get_boundary_polygon() |
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| 155 | for key in P.keys(): |
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| 156 | if key in ['exchange_polygon0', |
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| 157 | 'exchange_polygon1', |
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| 158 | 'enquiry_polygon0', |
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| 159 | 'enquiry_polygon1']: |
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| 160 | for point in P[key]: |
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| 161 | |
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| 162 | msg = 'Point %s in polygon %s for culvert %s did not'\ |
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| 163 | %(str(point), key, self.label) |
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| 164 | msg += 'fall within the domain boundary.' |
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| 165 | assert is_inside_polygon(point, bounding_polygon), msg |
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| 166 | |
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| 167 | |
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| 168 | # Create inflow object at each end of the culvert. |
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| 169 | self.openings = [] |
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| 170 | self.openings.append(Inflow(domain, |
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| 171 | polygon=P['exchange_polygon0'])) |
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| 172 | |
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| 173 | self.openings.append(Inflow(domain, |
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| 174 | polygon=P['exchange_polygon1'])) |
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| 175 | |
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| 176 | |
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| 177 | # Assume two openings for now: Referred to as 0 and 1 |
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| 178 | assert len(self.openings) == 2 |
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| 179 | |
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| 180 | # Store basic geometry |
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| 181 | self.end_points = [end_point0, end_point1] |
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| 182 | self.invert_levels = [invert_level0, invert_level1] |
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| 183 | #self.enquiry_polygons = [P['enquiry_polygon0'], P['enquiry_polygon1']] |
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| 184 | self.enquiry_polylines = [P['enquiry_polygon0'][:2], |
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| 185 | P['enquiry_polygon1'][:2]] |
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| 186 | self.vector = P['vector'] |
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| 187 | self.length = P['length']; assert self.length > 0.0 |
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| 188 | self.verbose = verbose |
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| 189 | self.last_time = 0.0 |
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| 190 | |
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| 191 | |
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| 192 | # Store hydraulic parameters |
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| 193 | self.manning = manning |
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| 194 | self.loss_exit = loss_exit |
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| 195 | self.loss_entry = loss_entry |
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| 196 | self.loss_bend = loss_bend |
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| 197 | self.loss_special = loss_special |
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| 198 | self.sum_loss = loss_exit + loss_entry + loss_bend + loss_special |
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| 199 | self.blockage_topdwn = blockage_topdwn |
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| 200 | self.blockage_bottup = blockage_bottup |
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| 201 | |
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| 202 | # Store culvert routine |
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| 203 | self.culvert_routine = culvert_routine |
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| 204 | |
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| 205 | |
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| 206 | # Create objects to update momentum (a bit crude at this stage) |
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| 207 | |
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| 208 | |
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| 209 | xmom0 = General_forcing(domain, 'xmomentum', |
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| 210 | polygon=P['exchange_polygon0']) |
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| 211 | |
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| 212 | xmom1 = General_forcing(domain, 'xmomentum', |
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| 213 | polygon=P['exchange_polygon1']) |
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| 214 | |
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| 215 | ymom0 = General_forcing(domain, 'ymomentum', |
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| 216 | polygon=P['exchange_polygon0']) |
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| 217 | |
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| 218 | ymom1 = General_forcing(domain, 'ymomentum', |
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| 219 | polygon=P['exchange_polygon1']) |
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| 220 | |
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| 221 | self.opening_momentum = [ [xmom0, ymom0], [xmom1, ymom1] ] |
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| 222 | |
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| 223 | |
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| 224 | # Print something |
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| 225 | s = 'Culvert Effective Length = %.2f m' %(self.length) |
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| 226 | log_to_file(self.log_filename, s) |
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| 227 | |
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| 228 | s = 'Culvert Direction is %s\n' %str(self.vector) |
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| 229 | log_to_file(self.log_filename, s) |
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| 230 | |
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| 231 | def __call__(self, domain): |
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| 232 | from anuga.utilities.numerical_tools import mean |
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| 233 | |
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| 234 | from anuga.config import g, epsilon |
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| 235 | from anuga.config import velocity_protection |
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| 236 | |
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| 237 | |
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| 238 | log_filename = self.log_filename |
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| 239 | |
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| 240 | # Time stuff |
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| 241 | time = domain.get_time() |
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| 242 | delta_t = time-self.last_time |
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| 243 | s = '\nTime = %.2f, delta_t = %f' %(time, delta_t) |
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| 244 | log_to_file(log_filename, s) |
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| 245 | |
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| 246 | msg = 'Time did not advance' |
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| 247 | if time > 0.0: assert delta_t > 0.0, msg |
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| 248 | |
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| 249 | |
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| 250 | # Get average water depths at each opening |
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| 251 | openings = self.openings # There are two Opening [0] and [1] |
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| 252 | for i, opening in enumerate(openings): |
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| 253 | dq = domain.quantities |
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| 254 | |
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| 255 | # Compute mean values of selected quantitites in the exchange area in front of the culvert |
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| 256 | # Stage and velocity comes from enquiry area and elevation from exchange area |
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| 257 | |
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| 258 | stage = dq['stage'].get_values(location='centroids', |
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| 259 | indices=opening.exchange_indices) |
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| 260 | w = mean(stage) # Average stage |
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| 261 | |
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| 262 | # Use invert level instead of elevation if specified |
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| 263 | invert_level = self.invert_levels[i] |
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| 264 | if invert_level is not None: |
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| 265 | z = invert_level |
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| 266 | else: |
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| 267 | elevation = dq['elevation'].get_values(location='centroids', indices=opening.exchange_indices) |
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| 268 | z = mean(elevation) # Average elevation |
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| 269 | |
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| 270 | # Estimated depth above the culvert inlet |
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| 271 | d = w - z # Used for calculations involving depth |
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| 272 | if d < 0.0: |
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| 273 | # This is possible since w and z are taken at different locations |
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| 274 | #msg = 'D < 0.0: %f' %d |
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| 275 | #raise msg |
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| 276 | d = 0.0 |
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| 277 | |
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| 278 | |
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| 279 | # Ratio of depth to culvert height. |
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| 280 | # If ratio > 1 then culvert is running full |
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| 281 | if self.culvert_type == 'circle': |
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| 282 | ratio = d/self.diameter |
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| 283 | else: |
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| 284 | ratio = d/self.height |
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| 285 | opening.ratio = ratio |
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| 286 | |
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| 287 | |
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| 288 | # Average measures of energy in front of this opening |
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| 289 | polyline = self.enquiry_polylines[i] |
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| 290 | #print 't = %.4f, opening=%d,' %(domain.time, i), |
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| 291 | opening.total_energy = domain.get_energy_through_cross_section(polyline, |
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| 292 | kind='total') |
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| 293 | #print 'Et = %.3f m' %opening.total_energy |
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| 294 | |
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| 295 | # Store current average stage and depth with each opening object |
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| 296 | opening.depth = d |
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| 297 | opening.depth_trigger = d # Use this for now |
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| 298 | opening.stage = w |
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| 299 | opening.elevation = z |
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| 300 | |
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| 301 | |
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| 302 | ################# End of the FOR loop ################################################ |
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| 303 | |
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| 304 | |
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| 305 | # We now need to deal with each opening individually |
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| 306 | |
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| 307 | # Determine flow direction based on total energy difference |
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| 308 | delta_Et = openings[0].total_energy - openings[1].total_energy |
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| 309 | |
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| 310 | if delta_Et > 0: |
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| 311 | #print 'Flow U/S ---> D/S' |
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| 312 | inlet = openings[0] |
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| 313 | outlet = openings[1] |
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| 314 | |
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| 315 | inlet.momentum = self.opening_momentum[0] |
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| 316 | outlet.momentum = self.opening_momentum[1] |
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| 317 | |
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| 318 | else: |
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| 319 | #print 'Flow D/S ---> U/S' |
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| 320 | inlet = openings[1] |
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| 321 | outlet = openings[0] |
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| 322 | |
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| 323 | inlet.momentum = self.opening_momentum[1] |
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| 324 | outlet.momentum = self.opening_momentum[0] |
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| 325 | |
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| 326 | delta_Et = -delta_Et |
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| 327 | |
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| 328 | msg = 'Total energy difference is negative' |
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| 329 | assert delta_Et > 0.0, msg |
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| 330 | |
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| 331 | delta_h = inlet.stage - outlet.stage |
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| 332 | delta_z = inlet.elevation - outlet.elevation |
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| 333 | culvert_slope = (delta_z/self.length) |
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| 334 | |
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| 335 | if culvert_slope < 0.0: |
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| 336 | # Adverse gradient - flow is running uphill |
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| 337 | # Flow will be purely controlled by uphill outlet face |
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| 338 | print 'WARNING: Flow is running uphill. Watch Out!', inlet.elevation, outlet.elevation |
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| 339 | |
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| 340 | |
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| 341 | s = 'Delta total energy = %.3f' %(delta_Et) |
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| 342 | log_to_file(log_filename, s) |
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| 343 | |
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| 344 | |
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| 345 | # Calculate discharge for one barrel |
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| 346 | Q, barrel_velocity, culvert_outlet_depth = self.culvert_routine(self, inlet, outlet, delta_Et, g) |
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| 347 | |
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| 348 | # Adjust discharge for multiple barrels |
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| 349 | Q *= self.number_of_barrels |
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| 350 | |
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| 351 | # Compute barrel momentum |
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| 352 | barrel_momentum = barrel_velocity*culvert_outlet_depth |
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| 353 | |
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| 354 | s = 'Barrel velocity = %f' %barrel_velocity |
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| 355 | log_to_file(log_filename, s) |
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| 356 | |
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| 357 | # Compute momentum vector at outlet |
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| 358 | outlet_mom_x, outlet_mom_y = self.vector * barrel_momentum |
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| 359 | |
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| 360 | s = 'Directional momentum = (%f, %f)' %(outlet_mom_x, outlet_mom_y) |
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| 361 | log_to_file(log_filename, s) |
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| 362 | |
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| 363 | # Log timeseries to file |
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| 364 | fid = open(self.timeseries_filename, 'a') |
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| 365 | fid.write('%f, %f, %f, %f, %f\n'\ |
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| 366 | %(time, |
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| 367 | openings[0].total_energy, |
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| 368 | openings[1].total_energy, |
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| 369 | barrel_velocity, |
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| 370 | Q)) |
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| 371 | fid.close() |
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| 372 | |
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| 373 | # Update momentum |
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| 374 | delta_t = time - self.last_time |
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| 375 | if delta_t > 0.0: |
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| 376 | xmomentum_rate = outlet_mom_x - outlet.momentum[0].value |
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| 377 | xmomentum_rate /= delta_t |
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| 378 | |
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| 379 | ymomentum_rate = outlet_mom_y - outlet.momentum[1].value |
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| 380 | ymomentum_rate /= delta_t |
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| 381 | |
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| 382 | s = 'X Y MOM_RATE = (%f, %f) ' %(xmomentum_rate, ymomentum_rate) |
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| 383 | log_to_file(log_filename, s) |
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| 384 | else: |
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| 385 | xmomentum_rate = ymomentum_rate = 0.0 |
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| 386 | |
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| 387 | |
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| 388 | # Set momentum rates for outlet jet |
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| 389 | outlet.momentum[0].rate = xmomentum_rate |
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| 390 | outlet.momentum[1].rate = ymomentum_rate |
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| 391 | |
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| 392 | # Remember this value for next step (IMPORTANT) |
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| 393 | outlet.momentum[0].value = outlet_mom_x |
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| 394 | outlet.momentum[1].value = outlet_mom_y |
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| 395 | |
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| 396 | if int(domain.time*100) % 100 == 0: |
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| 397 | s = 'T=%.5f, Culvert Discharge = %.3f f'\ |
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| 398 | %(time, Q) |
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| 399 | s += ' Depth= %0.3f Momentum = (%0.3f, %0.3f)'\ |
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| 400 | %(culvert_outlet_depth, outlet_mom_x,outlet_mom_y) |
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| 401 | s += ' Momentum rate: (%.4f, %.4f)'\ |
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| 402 | %(xmomentum_rate, ymomentum_rate) |
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| 403 | s+='Outlet Vel= %.3f'\ |
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| 404 | %(barrel_velocity) |
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| 405 | log_to_file(log_filename, s) |
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| 406 | |
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| 407 | |
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| 408 | |
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| 409 | |
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| 410 | |
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| 411 | # Execute flow term for each opening |
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| 412 | # This is where Inflow objects are evaluated and update the domain |
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| 413 | for opening in self.openings: |
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| 414 | opening(domain) |
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| 415 | |
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| 416 | # Execute momentum terms |
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| 417 | # This is where Inflow objects are evaluated and update the domain |
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| 418 | outlet.momentum[0](domain) |
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| 419 | outlet.momentum[1](domain) |
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| 420 | |
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| 421 | # Store value of time |
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| 422 | self.last_time = time |
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| 423 | |
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| 424 | |
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