1 | """Simple water flow example using ANUGA |
---|
2 | |
---|
3 | Water driven up a linear slope and time varying boundary, |
---|
4 | similar to a beach environment |
---|
5 | """ |
---|
6 | |
---|
7 | |
---|
8 | #------------------------------------------------------------------------------ |
---|
9 | # Import necessary modules |
---|
10 | #------------------------------------------------------------------------------ |
---|
11 | |
---|
12 | from pyvolution.mesh_factory import rectangular |
---|
13 | from pyvolution.shallow_water import Domain |
---|
14 | from pyvolution.shallow_water import Reflective_boundary |
---|
15 | from pyvolution.shallow_water import Dirichlet_boundary |
---|
16 | from pyvolution.shallow_water import Time_boundary |
---|
17 | from pyvolution.shallow_water import Transmissive_boundary |
---|
18 | |
---|
19 | |
---|
20 | #------------------------------------------------------------------------------ |
---|
21 | # Setup computational domain |
---|
22 | #------------------------------------------------------------------------------ |
---|
23 | |
---|
24 | points, vertices, boundary = rectangular(10, 10) # Basic mesh |
---|
25 | |
---|
26 | domain = Domain(points, vertices, boundary) # Create domain |
---|
27 | domain.set_name('bedslope') # Output to bedslope.sww |
---|
28 | domain.set_datadir('.') # Use current directory for output |
---|
29 | domain.set_quantities_to_be_stored(['stage',# Store all conserved quantities |
---|
30 | 'xmomentum', |
---|
31 | 'ymomentum']) |
---|
32 | |
---|
33 | |
---|
34 | #------------------------------------------------------------------------------ |
---|
35 | # Setup initial conditions |
---|
36 | #------------------------------------------------------------------------------ |
---|
37 | |
---|
38 | def topography(x,y): |
---|
39 | return -x/2 # linear bed slope |
---|
40 | #return x*(-(2.0-x)*.5) # curved bed slope |
---|
41 | |
---|
42 | domain.set_quantity('elevation', topography) # Use function for elevation |
---|
43 | domain.set_quantity('friction', 0.1) # Constant friction |
---|
44 | domain.set_quantity('stage', -.4) # Constant negative initial stage |
---|
45 | |
---|
46 | |
---|
47 | #------------------------------------------------------------------------------ |
---|
48 | # Setup boundary conditions |
---|
49 | #------------------------------------------------------------------------------ |
---|
50 | |
---|
51 | from math import sin, pi |
---|
52 | Br = Reflective_boundary(domain) # Solid reflective wall |
---|
53 | Bt = Transmissive_boundary(domain) # Continue all values on boundary |
---|
54 | Bd = Dirichlet_boundary([-0.5,0.,0.]) # Constant boundary values |
---|
55 | Bw = Time_boundary(domain=domain, # Time dependent boundary |
---|
56 | f=lambda t: [(1.*sin(t*2*pi)-0.3), 0.0, 0.0]) |
---|
57 | |
---|
58 | # Associate boundary tags with boundary objects |
---|
59 | domain.set_boundary({'left': Br, 'right': Bw, 'top': Br, 'bottom': Br}) |
---|
60 | |
---|
61 | |
---|
62 | #------------------------------------------------------------------------------ |
---|
63 | # Evolve system through time |
---|
64 | #------------------------------------------------------------------------------ |
---|
65 | |
---|
66 | for t in domain.evolve(yieldstep = 0.1, finaltime = 4.0): |
---|
67 | domain.write_time() |
---|
68 | |
---|
69 | |
---|
70 | |
---|