| 1 | """Create mesh for University of Queensland dam break flume |
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| 2 | """ |
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| 3 | |
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| 4 | |
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| 5 | from anuga.pmesh.mesh import * |
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| 6 | from anuga.coordinate_transforms.geo_reference import Geo_reference |
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| 7 | |
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| 8 | |
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| 9 | def generate(mesh_filename, gate_position, is_coarse = False): |
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| 10 | """ |
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| 11 | Generate mesh for University of Queensland dam break flume. |
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| 12 | The gate position is the distance from the right wall of the wave tank |
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| 13 | to the gate. |
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| 14 | |
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| 15 | """ |
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| 16 | #Basic geometry |
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| 17 | |
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| 18 | xright = gate_position |
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| 19 | ybottom = 0 |
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| 20 | ytop = 0.4 |
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| 21 | xdam = 0.0 |
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| 22 | xleft = gate_position - 3.0 |
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| 23 | |
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| 24 | #Outline |
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| 25 | point_sw = [xleft, ybottom] |
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| 26 | point_se = [xright, ybottom] |
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| 27 | point_nw = [xleft, ytop] |
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| 28 | point_ne = [xright, ytop] |
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| 29 | |
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| 30 | # Dam seperation (left) |
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| 31 | point_dam_top = [xdam, ytop] |
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| 32 | point_dam_bottom = [xdam, ybottom] |
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| 33 | |
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| 34 | m = Mesh() |
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| 35 | |
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| 36 | #Boundary |
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| 37 | points = [point_sw, #se |
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| 38 | point_nw, |
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| 39 | point_dam_top, |
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| 40 | point_ne, |
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| 41 | point_se, |
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| 42 | point_dam_bottom |
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| 43 | ] |
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| 44 | |
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| 45 | segments = [[0,1], [1,2], [2,3], |
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| 46 | [3,4 ],[4,5], [5,0], #The outer border |
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| 47 | [2,5]] #dam Separator |
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| 48 | |
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| 49 | segment_tags = {'wall':[0,1,2,4,5],'edge':[3]} # '':[6] |
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| 50 | |
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| 51 | m.add_points_and_segments(points, segments, segment_tags) |
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| 52 | |
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| 53 | dam = m.add_region(-0.0000001,(ytop - ybottom)/2) |
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| 54 | # this is the location of the region. |
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| 55 | dam.setTag("dam") |
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| 56 | |
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| 57 | if is_coarse: |
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| 58 | m.generate_mesh(maximum_triangle_area=0.05) |
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| 59 | else: |
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| 60 | m.generate_mesh(maximum_triangle_area=0.0001) |
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| 61 | |
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| 62 | m.export_mesh_file(mesh_filename) |
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| 63 | print "mesh created" |
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| 64 | |
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| 65 | #------------------------------------------------------------- |
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| 66 | if __name__ == "__main__": |
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| 67 | generate("aa.tsh", 0.75, is_course = True) |
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