source: anuga_validation/convergence_study/dam_break.py @ 5826

"""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
from anuga.abstract_2d_finite_volumes.mesh_factory import rectangular_cross
from anuga.shallow_water import Domain
from anuga.shallow_water import Reflective_boundary
from anuga.shallow_water import Dirichlet_boundary
from anuga.shallow_water import Time_boundary
from anuga.shallow_water import Transmissive_boundary
from anuga.shallow_water import Transmissive_Momentum_Set_Stage_boundary
from anuga.shallow_water.data_manager import start_screen_catcher, copy_code_files

from math import cos
from Numeric 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'

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


#------------------------------------------------------------------------------
# Setup domain
#------------------------------------------------------------------------------
dx = 200.
dy = dx
L = 100000.
W = 10*dx

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

domain = 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()

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
h1 = 0.0

def height(x,y):
    z = zeros(len(x),Float)
    for i in range(len(x)):
        if x[i]<=50000.0:
            z[i] = h0
        else:
            z[i] = h1
    return z


domain.set_quantity('stage', height)
#-----------------------------------------------------------------------------
# Setup boundary conditions
#------------------------------------------------------------------------------
from math import sin, pi, exp
Br = Reflective_boundary(domain)      # Solid reflective wall
Bt = Transmissive_boundary(domain)    # Continue all values on boundary 
Bd = 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
vis = RealtimeVisualiser(domain)
vis.render_quantity_height("stage", zScale =h0*500, dynamic=True)
vis.colour_height_quantity('stage', (0.0, 0.5, 1.0))
vis.start()
#===============================================================================


#------------------------------------------------------------------------------
# Evolve system through time
#------------------------------------------------------------------------------

for t in domain.evolve(yieldstep = 100.0, finaltime = 60*60.):
    print domain.timestepping_statistics(track_speeds=True)
    vis.update()
    
vis.evolveFinished()