| 1 | """Example of shallow water wave equation. |
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| 2 | |
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| 3 | Specific methods pertaining to the 2D shallow water equation |
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| 4 | are imported from shallow_water |
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| 5 | for use with the generic finite volume framework |
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| 6 | |
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| 7 | A example of running this program is; |
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| 8 | python run_tsh.py visualise hill.tsh 0.05 1 |
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| 9 | """ |
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| 10 | |
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| 11 | ###################### |
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| 12 | # Module imports |
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| 13 | # |
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| 14 | |
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| 15 | import sys |
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| 16 | from os import sep, path |
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| 17 | sys.path.append('..'+sep+'pyvolution') |
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| 18 | |
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| 19 | from shallow_water import Domain, Reflective_boundary, Dirichlet_boundary,\ |
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| 20 | Transmissive_boundary, Time_boundary, Add_value_to_region |
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| 21 | from mesh_factory import rectangular |
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| 22 | from pmesh2domain import pmesh_to_domain, pmesh_to_domain_instance |
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| 23 | |
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| 24 | from Numeric import array |
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| 25 | |
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| 26 | |
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| 27 | from config import default_datadir |
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| 28 | |
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| 29 | ###################### |
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| 30 | # Domain |
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| 31 | |
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| 32 | import sys |
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| 33 | |
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| 34 | usage = "usage: %s ['visual'|'non-visual'] pmesh_file_name yieldstep finaltime" % path.basename(sys.argv[0]) |
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| 35 | |
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| 36 | if len(sys.argv) < 4: |
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| 37 | print usage |
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| 38 | else: |
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| 39 | if sys.argv[1][0] == "n" or sys.argv[1][0] == "N": |
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| 40 | visualise = False |
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| 41 | else: |
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| 42 | visualise = True |
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| 43 | filename = sys.argv[2] |
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| 44 | yieldstep = float(sys.argv[3]) |
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| 45 | finaltime = float(sys.argv[4]) |
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| 46 | |
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| 47 | print 'Creating domain from', filename |
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| 48 | domain = pmesh_to_domain_instance(filename, Domain) |
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| 49 | print "Number of triangles = ", len(domain) |
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| 50 | |
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| 51 | domain.checkpoint = False #True |
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| 52 | domain.default_order = 1 |
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| 53 | domain.visualise = visualise |
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| 54 | domain.smooth = True |
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| 55 | |
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| 56 | if (domain.visualise): |
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| 57 | domain.store = False #True #Store for visualisation purposes |
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| 58 | else: |
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| 59 | domain.store = True #True #Store for visualisation purposes |
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| 60 | domain.format = 'sww' #Native netcdf visualisation format |
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| 61 | |
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| 62 | file_path, filename = path.split(filename) |
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| 63 | filename, ext = path.splitext(filename) |
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| 64 | if domain.smooth is True: |
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| 65 | s = 'smooth' |
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| 66 | else: |
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| 67 | s = 'nonsmooth' |
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| 68 | domain.filename = filename + '_' + s + '_ys'+ str(yieldstep) + \ |
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| 69 | '_ft' + str(finaltime) |
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| 70 | print "Output being written to " + default_datadir + sep + \ |
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| 71 | domain.filename + "." + domain.format |
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| 72 | |
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| 73 | |
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| 74 | #Set friction |
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| 75 | manning = 0.07 |
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| 76 | inflow_stage = 10.0 |
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| 77 | domain.set_quantity('friction', manning) |
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| 78 | |
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| 79 | ###################### |
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| 80 | # Boundary conditions |
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| 81 | # |
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| 82 | print 'Boundaries' |
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| 83 | reflective = Reflective_boundary(domain) |
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| 84 | Bt = Transmissive_boundary(domain) |
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| 85 | |
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| 86 | #Constant inflow |
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| 87 | Bd = Dirichlet_boundary(array([10, 0.0, 0.0])) |
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| 88 | |
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| 89 | #Time dependent inflow |
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| 90 | from math import sin, pi |
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| 91 | Bw = Time_boundary(domain=domain, |
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| 92 | f=lambda x: array([(1 + sin(x*pi/4))*\ |
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| 93 | (inflow_stage*(sin(2.5*x*pi)+0.7)),0,0])) |
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| 94 | |
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| 95 | |
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| 96 | print 'Available boundary tags are', domain.get_boundary_tags() |
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| 97 | |
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| 98 | #Set boundary conditions |
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| 99 | |
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| 100 | tags = {} |
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| 101 | tags['left'] = Bw |
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| 102 | tags['1'] = Time_boundary(domain=domain, |
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| 103 | f=lambda x: array([(1 + sin(x*pi/4))*\ |
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| 104 | (0.15*(sin(2.5*x*pi)+0.7)),0,0])) |
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| 105 | tags['wave'] = Bd |
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| 106 | tags['wave'] = Time_boundary(domain=domain, |
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| 107 | f=lambda x: array([(1 + sin(x*pi/4))*\ |
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| 108 | (0.15*(sin(2.5*x*pi)+0.7)),0,0])) |
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| 109 | tags['internal'] = None |
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| 110 | tags['levee'] = None |
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| 111 | tags['0'] = reflective |
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| 112 | tags['wall'] = reflective |
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| 113 | tags['external'] = reflective |
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| 114 | tags['exterior'] = reflective |
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| 115 | tags['open'] = Bd |
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| 116 | tags['opening'] = None |
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| 117 | |
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| 118 | domain.set_boundary(tags) |
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| 119 | |
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| 120 | # region tags |
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| 121 | #domain.set_region(Set_region('mound', 'elevation', 100, location='unique vertices')) |
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| 122 | domain.set_region(Add_value_to_region('floodplain', 'elevation', 100, location='unique vertices', initial_quantity='elevation')) |
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| 123 | domain.set_region(Add_value_to_region('mound', 'elevation', 100, location='unique vertices', initial_quantity='elevation')) |
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| 124 | domain.set_region(Add_value_to_region('reservoir', 'stage', 100.0,initial_quantity='elevation')) |
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| 125 | |
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| 126 | #print domain.quantities['elevation'].vertex_values |
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| 127 | #print domain.quantities['stage'].vertex_values |
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| 128 | |
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| 129 | domain.check_integrity() |
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| 130 | |
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| 131 | ###################### |
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| 132 | #Evolution |
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| 133 | for t in domain.evolve(yieldstep = yieldstep, finaltime = finaltime): |
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| 134 | domain.write_time() |
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| 135 | |
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| 136 | print 'Done' |
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| 137 | |
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| 138 | |
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