| 1 | from anuga.geometry.polygon import inside_polygon, polygon_area |
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| 2 | from anuga.config import g, velocity_protection |
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| 3 | import anuga.utilities.log as log |
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| 4 | import math |
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| 5 | |
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| 6 | import structure_operator |
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| 7 | |
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| 8 | class Boyd_box_operator(structure_operator.Structure_operator): |
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| 9 | """Culvert flow - transfer water from one rectangular box to another. |
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| 10 | Sets up the geometry of problem |
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| 11 | |
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| 12 | This is the base class for culverts. Inherit from this class (and overwrite |
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| 13 | compute_discharge method for specific subclasses) |
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| 14 | |
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| 15 | Input: Two points, pipe_size (either diameter or width, height), |
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| 16 | mannings_rougness, |
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| 17 | """ |
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| 18 | |
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| 19 | def __init__(self, |
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| 20 | domain, |
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| 21 | end_point0, |
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| 22 | end_point1, |
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| 23 | width, |
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| 24 | height=None, |
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| 25 | apron=None, |
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| 26 | manning=0.013, |
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| 27 | enquiry_gap=0.2, |
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| 28 | use_momentum_jet=True, |
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| 29 | use_velocity_head=True, |
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| 30 | description=None, |
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| 31 | verbose=False): |
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| 32 | |
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| 33 | structure_operator.Structure_operator.__init__(self, |
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| 34 | domain, |
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| 35 | end_point0, |
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| 36 | end_point1, |
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| 37 | width, |
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| 38 | height, |
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| 39 | apron, |
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| 40 | manning, |
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| 41 | enquiry_gap, |
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| 42 | description, |
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| 43 | verbose) |
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| 44 | |
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| 45 | self.use_momentum_jet = use_momentum_jet |
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| 46 | self.use_velocity_head = use_velocity_head |
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| 47 | |
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| 48 | self.culvert_length = self.get_culvert_length() |
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| 49 | self.culvert_width = self.get_culvert_width() |
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| 50 | self.culvert_height = self.get_culvert_height() |
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| 51 | |
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| 52 | |
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| 53 | self.sum_loss = 0.0 |
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| 54 | self.max_velocity = 10.0 |
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| 55 | self.log_filename = None |
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| 56 | |
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| 57 | self.inlets = self.get_inlets() |
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| 58 | |
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| 59 | |
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| 60 | # Stats |
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| 61 | |
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| 62 | self.discharge = 0.0 |
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| 63 | self.velocity = 0.0 |
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| 64 | |
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| 65 | |
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| 66 | def __call__(self): |
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| 67 | |
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| 68 | timestep = self.domain.get_timestep() |
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| 69 | |
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| 70 | self.__determine_inflow_outflow() |
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| 71 | |
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| 72 | Q, barrel_speed, outlet_depth = self.__discharge_routine() |
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| 73 | |
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| 74 | #inflow = self.routine.get_inflow() |
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| 75 | #outflow = self.routine.get_outflow() |
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| 76 | |
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| 77 | old_inflow_height = self.inflow.get_average_height() |
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| 78 | old_inflow_xmom = self.inflow.get_average_xmom() |
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| 79 | old_inflow_ymom = self.inflow.get_average_ymom() |
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| 80 | |
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| 81 | if old_inflow_height > 0.0 : |
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| 82 | Qstar = Q/old_inflow_height |
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| 83 | else: |
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| 84 | Qstar = 0.0 |
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| 85 | |
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| 86 | factor = 1.0/(1.0 + Qstar*timestep/self.inflow.get_area()) |
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| 87 | |
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| 88 | new_inflow_height = old_inflow_height*factor |
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| 89 | new_inflow_xmom = old_inflow_xmom*factor |
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| 90 | new_inflow_ymom = old_inflow_ymom*factor |
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| 91 | |
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| 92 | |
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| 93 | self.inflow.set_heights(new_inflow_height) |
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| 94 | |
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| 95 | #inflow.set_xmoms(Q/inflow.get_area()) |
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| 96 | #inflow.set_ymoms(0.0) |
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| 97 | |
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| 98 | |
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| 99 | self.inflow.set_xmoms(new_inflow_xmom) |
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| 100 | self.inflow.set_ymoms(new_inflow_ymom) |
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| 101 | |
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| 102 | |
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| 103 | loss = (old_inflow_height - new_inflow_height)*self.inflow.get_area() |
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| 104 | |
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| 105 | |
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| 106 | # set outflow |
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| 107 | if old_inflow_height > 0.0 : |
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| 108 | timestep_star = timestep*new_inflow_height/old_inflow_height |
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| 109 | else: |
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| 110 | timestep_star = 0.0 |
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| 111 | |
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| 112 | |
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| 113 | outflow_extra_height = Q*timestep_star/self.outflow.get_area() |
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| 114 | outflow_direction = - self.outflow.outward_culvert_vector |
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| 115 | outflow_extra_momentum = outflow_extra_height*barrel_speed*outflow_direction |
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| 116 | |
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| 117 | |
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| 118 | gain = outflow_extra_height*self.outflow.get_area() |
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| 119 | |
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| 120 | #print Q, Q*timestep, barrel_speed, outlet_depth, Qstar, factor, timestep_star |
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| 121 | #print ' ', loss, gain |
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| 122 | |
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| 123 | # Stats |
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| 124 | self.discharge = Q#outflow_extra_height*self.outflow.get_area()/timestep |
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| 125 | self.velocity = barrel_speed#self.discharge/outlet_depth/self.width |
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| 126 | |
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| 127 | new_outflow_height = self.outflow.get_average_height() + outflow_extra_height |
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| 128 | |
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| 129 | if self.use_momentum_jet : |
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| 130 | # FIXME (SR) Review momentum to account for possible hydraulic jumps at outlet |
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| 131 | #new_outflow_xmom = outflow.get_average_xmom() + outflow_extra_momentum[0] |
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| 132 | #new_outflow_ymom = outflow.get_average_ymom() + outflow_extra_momentum[1] |
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| 133 | |
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| 134 | new_outflow_xmom = barrel_speed*new_outflow_height*outflow_direction[0] |
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| 135 | new_outflow_ymom = barrel_speed*new_outflow_height*outflow_direction[1] |
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| 136 | |
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| 137 | else: |
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| 138 | #new_outflow_xmom = outflow.get_average_xmom() |
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| 139 | #new_outflow_ymom = outflow.get_average_ymom() |
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| 140 | |
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| 141 | new_outflow_xmom = 0.0 |
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| 142 | new_outflow_ymom = 0.0 |
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| 143 | |
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| 144 | |
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| 145 | self.outflow.set_heights(new_outflow_height) |
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| 146 | self.outflow.set_xmoms(new_outflow_xmom) |
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| 147 | self.outflow.set_ymoms(new_outflow_ymom) |
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| 148 | |
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| 149 | |
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| 150 | def __determine_inflow_outflow(self): |
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| 151 | # Determine flow direction based on total energy difference |
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| 152 | |
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| 153 | if self.use_velocity_head: |
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| 154 | self.delta_total_energy = self.inlets[0].get_enquiry_total_energy() - self.inlets[1].get_enquiry_total_energy() |
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| 155 | else: |
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| 156 | self.delta_total_energy = self.inlets[0].get_enquiry_stage() - self.inlets[1].get_enquiry_stage() |
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| 157 | |
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| 158 | |
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| 159 | self.inflow = self.inlets[0] |
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| 160 | self.outflow = self.inlets[1] |
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| 161 | |
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| 162 | |
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| 163 | if self.delta_total_energy < 0: |
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| 164 | self.inflow = self.inlets[1] |
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| 165 | self.outflow = self.inlets[0] |
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| 166 | self.delta_total_energy = -self.delta_total_energy |
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| 167 | |
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| 168 | |
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| 169 | def __discharge_routine(self): |
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| 170 | |
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| 171 | local_debug ='false' |
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| 172 | |
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| 173 | if self.inflow.get_enquiry_height() > 0.01: #this value was 0.01: |
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| 174 | if local_debug =='true': |
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| 175 | log.critical('Specific E & Deltat Tot E = %s, %s' |
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| 176 | % (str(self.inflow.get_enquiry_specific_energy()), |
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| 177 | str(self.delta_total_energy))) |
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| 178 | log.critical('culvert type = %s' % str(culvert_type)) |
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| 179 | # Water has risen above inlet |
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| 180 | |
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| 181 | if self.log_filename is not None: |
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| 182 | s = 'Specific energy = %f m' % self.inflow.get_enquiry_specific_energy() |
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| 183 | log_to_file(self.log_filename, s) |
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| 184 | |
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| 185 | msg = 'Specific energy at inlet is negative' |
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| 186 | assert self.inflow.get_enquiry_specific_energy() >= 0.0, msg |
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| 187 | |
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| 188 | if self.use_velocity_head : |
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| 189 | self.driving_energy = self.inflow.get_enquiry_specific_energy() |
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| 190 | else: |
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| 191 | self.driving_energy = self.inflow.get_enquiry_height() |
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| 192 | |
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| 193 | height = self.culvert_height |
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| 194 | width = self.culvert_width |
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| 195 | flow_width = self.culvert_width |
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| 196 | # intially assume the culvert flow is controlled by the inlet |
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| 197 | # check unsubmerged and submerged condition and use Min Q |
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| 198 | # but ensure the correct flow area and wetted perimeter are used |
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| 199 | Q_inlet_unsubmerged = 0.544*g**0.5*width*self.driving_energy**1.50 # Flow based on Inlet Ctrl Inlet Unsubmerged |
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| 200 | Q_inlet_submerged = 0.702*g**0.5*width*height**0.89*self.driving_energy**0.61 # Flow based on Inlet Ctrl Inlet Submerged |
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| 201 | |
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| 202 | # FIXME(Ole): Are these functions really for inlet control? |
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| 203 | if Q_inlet_unsubmerged < Q_inlet_submerged: |
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| 204 | Q = Q_inlet_unsubmerged |
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| 205 | dcrit = (Q**2/g/width**2)**0.333333 |
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| 206 | if dcrit > height: |
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| 207 | dcrit = height |
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| 208 | flow_area = width*dcrit |
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| 209 | perimeter= 2.0*(width+dcrit) |
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| 210 | else: # dcrit < height |
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| 211 | flow_area = width*dcrit |
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| 212 | perimeter= 2.0*dcrit+width |
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| 213 | outlet_culvert_depth = dcrit |
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| 214 | case = 'Inlet unsubmerged Box Acts as Weir' |
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| 215 | else: # Inlet Submerged but check internal culvert flow depth |
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| 216 | Q = Q_inlet_submerged |
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| 217 | dcrit = (Q**2/g/width**2)**0.333333 |
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| 218 | if dcrit > height: |
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| 219 | dcrit = height |
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| 220 | flow_area = width*dcrit |
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| 221 | perimeter= 2.0*(width+dcrit) |
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| 222 | else: # dcrit < height |
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| 223 | flow_area = width*dcrit |
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| 224 | perimeter= 2.0*dcrit+width |
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| 225 | outlet_culvert_depth = dcrit |
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| 226 | case = 'Inlet submerged Box Acts as Orifice' |
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| 227 | |
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| 228 | dcrit = (Q**2/g/width**2)**0.333333 |
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| 229 | # May not need this .... check if same is done above |
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| 230 | outlet_culvert_depth = dcrit |
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| 231 | if outlet_culvert_depth > height: |
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| 232 | outlet_culvert_depth = height # Once again the pipe is flowing full not partfull |
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| 233 | flow_area = width*height # Cross sectional area of flow in the culvert |
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| 234 | perimeter = 2*(width+height) |
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| 235 | case = 'Inlet CTRL Outlet unsubmerged PIPE PART FULL' |
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| 236 | else: |
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| 237 | flow_area = width * outlet_culvert_depth |
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| 238 | perimeter = width+2*outlet_culvert_depth |
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| 239 | case = 'INLET CTRL Culvert is open channel flow we will for now assume critical depth' |
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| 240 | # Initial Estimate of Flow for Outlet Control using energy slope |
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| 241 | #( may need to include Culvert Bed Slope Comparison) |
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| 242 | hyd_rad = flow_area/perimeter |
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| 243 | culvert_velocity = math.sqrt(self.delta_total_energy/((self.sum_loss/2/g)+(self.manning**2*self.culvert_length)/hyd_rad**1.33333)) |
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| 244 | Q_outlet_tailwater = flow_area * culvert_velocity |
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| 245 | |
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| 246 | |
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| 247 | if self.delta_total_energy < self.driving_energy: |
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| 248 | # Calculate flows for outlet control |
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| 249 | |
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| 250 | # Determine the depth at the outlet relative to the depth of flow in the Culvert |
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| 251 | if self.outflow.get_enquiry_height() > height: # The Outlet is Submerged |
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| 252 | outlet_culvert_depth=height |
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| 253 | flow_area=width*height # Cross sectional area of flow in the culvert |
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| 254 | perimeter=2.0*(width+height) |
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| 255 | case = 'Outlet submerged' |
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| 256 | else: # Here really should use the Culvert Slope to calculate Actual Culvert Depth & Velocity |
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| 257 | dcrit = (Q**2/g/width**2)**0.333333 |
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| 258 | outlet_culvert_depth=dcrit # For purpose of calculation assume the outlet depth = Critical Depth |
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| 259 | if outlet_culvert_depth > height: |
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| 260 | outlet_culvert_depth=height |
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| 261 | flow_area=width*height |
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| 262 | perimeter=2.0*(width+height) |
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| 263 | case = 'Outlet is Flowing Full' |
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| 264 | else: |
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| 265 | flow_area=width*outlet_culvert_depth |
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| 266 | perimeter=(width+2.0*outlet_culvert_depth) |
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| 267 | case = 'Outlet is open channel flow' |
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| 268 | |
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| 269 | hyd_rad = flow_area/perimeter |
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| 270 | |
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| 271 | if self.log_filename is not None: |
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| 272 | s = 'hydraulic radius at outlet = %f' % hyd_rad |
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| 273 | log_to_file(self.log_filename, s) |
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| 274 | |
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| 275 | # Final Outlet control velocity using tail water |
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| 276 | culvert_velocity = math.sqrt(self.delta_total_energy/((self.sum_loss/2/g)+(self.manning**2*self.culvert_length)/hyd_rad**1.33333)) |
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| 277 | Q_outlet_tailwater = flow_area * culvert_velocity |
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| 278 | |
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| 279 | if self.log_filename is not None: |
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| 280 | s = 'Q_outlet_tailwater = %.6f' % Q_outlet_tailwater |
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| 281 | log_to_file(self.log_filename, s) |
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| 282 | Q = min(Q, Q_outlet_tailwater) |
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| 283 | else: |
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| 284 | pass |
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| 285 | #FIXME(Ole): What about inlet control? |
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| 286 | |
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| 287 | culv_froude=math.sqrt(Q**2*flow_width/(g*flow_area**3)) |
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| 288 | if local_debug =='true': |
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| 289 | log.critical('FLOW AREA = %s' % str(flow_area)) |
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| 290 | log.critical('PERIMETER = %s' % str(perimeter)) |
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| 291 | log.critical('Q final = %s' % str(Q)) |
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| 292 | log.critical('FROUDE = %s' % str(culv_froude)) |
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| 293 | |
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| 294 | # Determine momentum at the outlet |
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| 295 | barrel_velocity = Q/(flow_area + velocity_protection/flow_area) |
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| 296 | |
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| 297 | # END CODE BLOCK for DEPTH > Required depth for CULVERT Flow |
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| 298 | |
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| 299 | else: # self.inflow.get_enquiry_height() < 0.01: |
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| 300 | Q = barrel_velocity = outlet_culvert_depth = 0.0 |
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| 301 | |
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| 302 | # Temporary flow limit |
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| 303 | if barrel_velocity > self.max_velocity: |
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| 304 | barrel_velocity = self.max_velocity |
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| 305 | Q = flow_area * barrel_velocity |
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| 306 | |
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| 307 | return Q, barrel_velocity, outlet_culvert_depth |
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| 308 | |
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| 309 | |
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| 310 | |
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