source: anuga_core/documentation/user_manual/demos/channel1.py @ 5173

Last change on this file since 5173 was 5173, checked in by ole, 12 years ago

Beautified demos

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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#------------------------------------------------------------------------------
18points, vertices, boundary = rectangular_cross(10, 5,
19                                               len1=10.0, len2=5.0) # Mesh
20
21domain = Domain(points, vertices, boundary)  # Create domain
22domain.set_name('channel1')                  # Output name
23
24
25#------------------------------------------------------------------------------
26# Setup initial conditions
27#------------------------------------------------------------------------------
28def topography(x,y):
29    return -x/10                             # linear bed slope
30
31domain.set_quantity('elevation', topography) # Use function for elevation
32domain.set_quantity('friction', 0.01)        # Constant friction
33domain.set_quantity('stage',                 # Dry bed
34                    expression='elevation + 0.0') 
35
36
37#------------------------------------------------------------------------------
38# Setup boundary conditions
39#------------------------------------------------------------------------------
40Bi = Dirichlet_boundary([0.4, 0, 0])         # Inflow
41Br = Reflective_boundary(domain)             # Solid reflective wall
42
43domain.set_boundary({'left': Bi, 'right': Br, 'top': Br, 'bottom': Br})
44
45
46#------------------------------------------------------------------------------
47# Evolve system through time
48#------------------------------------------------------------------------------
49for t in domain.evolve(yieldstep = 0.2, finaltime = 40.0):
50    print domain.timestepping_statistics()
51
52
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