source: anuga_work/development/continental_margin_0708/linear.py @ 5481

"""Simple water flow example using ANUGA

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


#------------------------------------------------------------------------------
# Import necessary modules
#------------------------------------------------------------------------------

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 time import strftime, gmtime
from os import sep, environ, getenv, getcwd,umask
from anuga.utilities.polygon import Polygon_function
from __future__ import division 
#------------------------------------------------------------------------------
# Setup computational domain
#------------------------------------------------------------------------------
from anuga.pmesh.mesh_interface import create_mesh_from_regions

name = 'curved_down_slope_linear_slope'
shelf = [300000]
slope = [150000]
wave = [0.5, -0.5] #1 returns leading depression N-wave
               #-1 returns leading crest N-wave
N = len (shelf)
for i in range(N):
    M = len (slope)
    for k in range (M):
        B = len(wave)
        for l in range(B): 
            length = (shelf[i]+slope[k])
            width = 800.
            A = 1
            T = 2700
            umask(002)
            time = strftime('%Y%m%d_%H%M%S',gmtime())
           ## output_dir = 'C:'+sep+'anuga_data'+sep+'topography'+sep+str(name)+sep+str(name)+'_'+str(wave[l])+'_'+str(shelf[i])+'_'+str(slope[k])+sep
            output_dir = sep+'d'+sep+'sim'+sep+'1'+sep+'mpittard'+sep+'idealised_bathymetry_study'+sep+'topography'+sep+str(name)+sep+str(name)+'_'+str(wave[l])+'T_'+str(shelf[i])+'_'+str(slope[k])+sep
    
            sww_file = str(name)
            copy_code_files(output_dir,__file__,__file__)
            start_screen_catcher(output_dir)
            boundary_polygon = [[0,0],[length,0],[length,width],[0,width]]
            
            meshname = str(name)+'.msh'
            create_mesh_from_regions(boundary_polygon,
                                     boundary_tags={'bottom': [0],
                                                    'right': [1],
                                                    'top': [2],
                                                    'left': [3]},
                                     maximum_triangle_area=20000,
                                     filename=meshname,
                                     use_cache=False,
                                     verbose=False)

            domain = Domain(meshname, use_cache=True, verbose=True)

            print 'Number of triangles = ', len(domain)
            print 'The extent is ', domain.get_extent()
            print domain.statistics()
             
            domain.set_quantities_to_be_stored(['stage', 'xmomentum', 'ymomentum'])
            domain.set_minimum_storable_height(0.01)
            domain.set_default_order(2)
            domain.set_name(sww_file)# Output name
            domain.set_datadir(output_dir)  


            #------------------------------------------------------------------------------
            # Setup initial conditions
            #------------------------------------------------------------------------------

            def topography(x,y):
                """Complex topography defined by a function of vectors x and y
                """
    
                z = (-5000/slope[k])*x-135+((5000/slope[k])*(shelf[i]))
                S = len (x)
                for j in range(S):

                    if x[j] < shelf[i]:
                        z[j] = -125/(shelf[i]*shelf[i])*x[j]*x[j]-10
                        
                return z
                


            domain.set_quantity('elevation', topography) # Use function for elevation
            domain.set_quantity('friction', 0)         # Constant friction    
            domain.set_quantity('stage', 0)            # Constant negative initial stage
            domain.tight_slope_limiters = 1


            #------------------------------------------------------------------------------
            # Setup boundary conditions
            #------------------------------------------------------------------------------

            from math import sin, pi, exp, cos, sqrt, cosh 
            Br = Reflective_boundary(domain)      # Solid reflective wall
            Bt = Transmissive_boundary(domain)    # Continue all values on boundary 
            Bd = Dirichlet_boundary([0.,0.,0.])   # Constant boundary values
        
            g = 9.81
            offshore_depth = 5145
            H_d_ratio = 0.0004
            Xo = 303000
            po = 12
            def waveform(t):
                return wave[l]*offshore_depth*(sqrt(g/offshore_depth)*t-Xo/offshore_depth)*sqrt(H_d_ratio*po)*H_d_ratio/cosh(sqrt(3*H_d_ratio*po/4)*(sqrt(g/offshore_depth)*t-Xo/offshore_depth))/cosh(sqrt(3*H_d_ratio*po/4)*(sqrt(g/offshore_depth)*t-Xo/offshore_depth))
          
            Bf = Transmissive_Momentum_Set_Stage_boundary(domain, waveform)
            # Associate boundary tags with boundary objects
            domain.set_boundary({'left': Bd, 'right': Bf, 'top': Br, 'bottom': Br})


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


            for t in domain.evolve(yieldstep = 45, finaltime = -1000+((length/50000)+1)*600+((shelf[i]/25000+1)*1000)): 
                domain.write_time()     
            for t in domain.evolve(yieldstep = 45, finaltime = 2700+((length/50000)+1)*600+((shelf[i]/25000+1)*1000),
                                   skip_initial_step = True):
                domain.write_time()   
            for t in domain.evolve(yieldstep = 120, finaltime = (length/25)+2700+((length/50000)+1)*600+((shelf[i]/25000+1)*1000), 
                                   skip_initial_step = True):
                domain.write_time()


                """
            Generate time series of nominated "gauges" 
            Note, this script will only work if pylab is installed on the platform

            Inputs:

            production dirs: dictionary of production directories with a
                             association to that simulation run, eg high tide,
                             magnitude, etc.
                                
            Outputs:

            * figures stored in same directory as sww file
            * time series data stored in csv files in same directory as sww file
            * elevation at nominated gauges (elev_output)
            """

            from os import getcwd, sep, altsep, mkdir, access, F_OK, remove
            from anuga.abstract_2d_finite_volumes.util import sww2timeseries

            # nominate directory location of sww file with associated attribute
            production_dirs = {output_dir: str(name)}

            # Generate figures
            swwfiles = {}
            for label_id in production_dirs.keys():
                file_loc = label_id
                swwfile = file_loc + str(name)+'.sww'
                swwfiles[swwfile] = label_id
                print 'hello', swwfile
            texname, elev_output = sww2timeseries(swwfiles,
                                                  sep+'d'+sep+'sim'+sep+'1'+sep+'mpittard'+sep+'anuga'+sep+'anuga_work'+sep+'development'+sep+'idealised_bathymetry_study'+sep+'continental_shelves'+sep+'gauges.csv',
                                                  production_dirs,
                                                  report = False,
                                                  reportname = '',
                                                  plot_quantity = ['stage', 'speed'],
                                                  generate_fig = False,
                                                  surface = False,
                                                  time_min = None,
                                                  time_max = None,
                                                  #time_unit = 'secs',
                                                  title_on = True,
                                                  verbose = True)
##            print (output_dir+sep+str(name)+'.sww')
##            remove(output_dir+sep+str(name)+'.sww')