source: anuga_core/source/anuga/examples/channel_1.py @ 3740

Last change on this file since 3740 was 3740, checked in by ole, 17 years ago

Channel examples (developed at SUT, September 2006)

File size: 2.2 KB
Line 
1"""Simple water flow example using ANUGA
2
3Water flowing down a channel
4"""
5
6#------------------------------------------------------------------------------
7# Import necessary modules
8#------------------------------------------------------------------------------
9from anuga.abstract_2d_finite_volumes.mesh_factory import rectangular_cross
10from anuga.shallow_water import Domain
11from anuga.shallow_water import Reflective_boundary
12from anuga.shallow_water import Dirichlet_boundary
13
14
15#------------------------------------------------------------------------------
16# Setup computational domain
17#------------------------------------------------------------------------------
18length = 10.
19width = 5.
20dx = dy = 1           # Resolution: Length of subdivisions on both axes
21
22points, vertices, boundary = rectangular_cross(int(length/dx), int(width/dy), len1=length, len2=width)
23domain = Domain(points, vertices, boundary)   # Create domain
24domain.set_name('channel_1')                  # Output name
25
26
27#------------------------------------------------------------------------------
28# Setup initial conditions
29#------------------------------------------------------------------------------
30def topography(x,y):
31    return -x/10                             # linear bed slope
32
33domain.set_quantity('elevation', topography)            # Use function for elevation
34domain.set_quantity('friction', 0.01)                   # Constant friction
35domain.set_quantity('stage', expression='elevation')    # Dry
36#domain.set_quantity('stage', expression='elevation + 0.1')    # Wet
37
38
39#------------------------------------------------------------------------------
40# Setup boundary conditions
41#------------------------------------------------------------------------------
42Bi = Dirichlet_boundary([0.4, 0, 0])                            # Inflow
43Br = Reflective_boundary(domain)                                # Solid reflective wall
44
45domain.set_boundary({'left': Bi, 'right': Br, 'top': Br, 'bottom': Br})
46
47
48#------------------------------------------------------------------------------
49# Evolve system through time
50#------------------------------------------------------------------------------
51for t in domain.evolve(yieldstep = 0.2, finaltime = 40.0):
52    domain.write_time()
53
54
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