source: trunk/anuga_validation/validation_tests/dam_break.py @ 8538

"""Simple water flow example using ANUGA

Water driven up a linear slope and time varying boundary,
similar to a beach environment
"""

#------------------------------------------------------------------------------
# Import necessary modules
#------------------------------------------------------------------------------
import sys
import anuga
from math import cos
from numpy import zeros, float
from time import localtime, strftime, gmtime



#-------------------------------------------------------------------------------
# Copy scripts to time stamped output directory and capture screen
# output to file
#-------------------------------------------------------------------------------
time = strftime('%Y%m%d_%H%M%S',localtime())

output_dir = 'dam_break_'+time
output_file = 'dam_break'

#anuga.copy_code_files(output_dir,__file__)
#start_screen_catcher(output_dir+'_')


#------------------------------------------------------------------------------
# Setup domain
#------------------------------------------------------------------------------
unit = 1.0
dx = unit/1.0
dy = dx
L = 100*unit
W = 10*unit

# structured mesh
points, vertices, boundary = anuga.rectangular_cross(int(L/dx), int(W/dy), L, W, (0.0, -W/2))

domain = anuga.Domain(points, vertices, boundary) 

domain.set_name(output_file)                
domain.set_datadir(output_dir)  

#------------------------------------------------------------------------------
# Setup Algorithm
#------------------------------------------------------------------------------
domain.set_timestepping_method('rk2')
domain.set_default_order(2)

print domain.get_timestepping_method()
print domain.s

domain.use_edge_limiter = True
domain.tight_slope_limiters = True
domain.use_centroid_velocities = False

domain.CFL = 1.0

domain.beta_w      = 0.6
domain.beta_uh     = 0.6
domain.beta_vh     = 0.6


#------------------------------------------------------------------------------
# Setup initial conditions
#------------------------------------------------------------------------------
domain.set_quantity('elevation',0.0)
domain.set_quantity('friction', 0.0)

h0 = 10.0*unit
h1 = 1.0*unit

def height(x,y):
    z = zeros(len(x), float)
    for i in range(len(x)):
        if x[i]<=50.0*unit:
            z[i] = h0
        else:
            z[i] = h1
    return z
domain.set_quantity('stage', height)

#-----------------------------------------------------------------------------
# Setup boundary conditions
#------------------------------------------------------------------------------
from math import sin, pi, exp
Br = anuga.Reflective_boundary(domain)      # Solid reflective wall
Bt = anuga.Transmissive_boundary(domain)    # Continue all values on boundary 
Bd = anuga.Dirichlet_boundary([1,0.,0.]) # Constant boundary values

# Associate boundary tags with boundary objects
domain.set_boundary({'left': Bt, 'right': Bt, 'top': Br, 'bottom': Br})


#===============================================================================
from anuga.visualiser import RealtimeVisualiser
wireframe = False
vis = RealtimeVisualiser(domain)
vis.render_quantity_height("stage", zScale=1, dynamic=True, wireframe=wireframe)
vis.render_quantity_height("elevation", zScale=1, dynamic=False, wireframe=wireframe)
vis.colour_height_quantity('stage', (0.0, 0.5, 1.0))
vis.colour_height_quantity('elevation', (0.5, 0.5, 0.5))
vis.start()
#===============================================================================


#------------------------------------------------------------------------------
# Evolve system through time
#------------------------------------------------------------------------------
for t in domain.evolve(yieldstep = 0.1, finaltime = 5.0):
    #print domain.timestepping_statistics(track_speeds=True)
    print domain.timestepping_statistics()
    vis.update()


#test against know data
    
vis.evolveFinished()