source: anuga_work/development/continental_margin_0708/wave_value_tester_900.py @ 5066

"""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 = 'wave_value_tester_900a'
shelf = [50000]
slope = [150000]
wave = [-0.5]
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+'wave_value_testers'+sep+str(name)+'_'+str(wave[l])+'_'+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
                """
                o = 2500/(slope[k]*slope[k]/4)
                print str(2500/(slope[k]*slope[k]/4))
                
                z = o*(x-(shelf[i]+slope[k]))*(x-(shelf[i]+slope[k]))-5125-10
                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

                    elif shelf[i] <= x[j] < (shelf[i]+slope[k]*0.5) :
                          z[j] = (-o)*(x[j]-shelf[i])*(x[j]-shelf[i])-125-10
                        
                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
            domain.beta_h = 0

            #------------------------------------------------------------------------------
            # 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 = 100000
            po = 130
            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 = (length/25)+2700+((length/50000)+1)*600+((shelf[i]/25000+1)*1000)): 
                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()

            from anuga.shallow_water.data_manager import sww2dem
            from os import sep

            name = 'wave_value_tester_900a' 
            time_dir = str(name)+'_'+str(wave[l])+'_50000_150000'
            cellsize = 50
            timestep = None
            output_dir = sep+'d'+sep+'sim'+sep+'1'+sep+'mpittard'+sep+'idealised_bathymetry_study'+sep+'wave_value_testers'+sep
            directory = output_dir
            name = directory+time_dir+sep+str(name)
            is_parallel = False
            if is_parallel == True: nodes = 4
            print 'output dir:', name

            #var = [0,2,3] # stage, depth and speed
            var = [0]

            for which_var in var:
                if which_var == 0:  # Stage
                    outname = name + '_stage'
                    quantityname = 'stage'

                if which_var == 1:  # Absolute Momentum
                    outname = name + '_momentum_i1'
                    quantityname = '(xmomentum**2 + ymomentum**2)**0.5'  

                if which_var == 2:  # Depth
                    outname = name + '_depth'
                    quantityname = 'stage-elevation'  

                if which_var == 3:  # Speed
                    outname = name + '_speed'
                    quantityname = '(xmomentum**2 + ymomentum**2)**0.5/(stage-elevation+1.e-6/(stage-elevation))'  #Speed

                if which_var == 4:  # Elevation
                    outname = name + '_elevation'
                    quantityname = 'elevation'  #Elevation

                if is_parallel == True:
                #    print 'is_parallel',is_parallel
                    for i in range(0,nodes):
                        namei = name + '_P%d_%d' %(i,nodes)
                        outnamei = outname + '_P%d_%d' %(i,nodes)
                        print 'start sww2dem for sww file %d' %(i)
                        sww2dem(namei, basename_out = outnamei,
                                    quantity = quantityname,
                                    timestep = timestep,
                                    cellsize = cellsize,      
                                    easting_min = 0,
                                    easting_max = 150000,
                                    northing_min = 0,
                                    northing_max = 400,        
                                    reduction = max, 
                                    verbose = True,
                                    format = 'asc')
                else:
                    print 'start sww2dem'
                    sww2dem(name, basename_out = outname,
                                quantity = quantityname,
                                timestep = timestep,
                                cellsize = cellsize,      
            ##                    easting_min = 0,
            ##                    easting_max = 150000,
            ##                    northing_min = 0,
            ##                    northing_max = 400,     
                                reduction = max, 
                                verbose = True,
                                format = 'asc')