/[escript]/trunk/doc/examples/cookbook/example11b.py
ViewVC logotype

Annotation of /trunk/doc/examples/cookbook/example11b.py

Parent Directory Parent Directory | Revision Log Revision Log


Revision 3892 - (hide annotations)
Tue Apr 10 08:57:23 2012 UTC (7 years, 6 months ago) by jfenwick
File MIME type: text/x-python
File size: 3365 byte(s)
Merged changes across from the attempt2 branch.
This version builds and passes python2 tests.
It also passes most python3 tests.



1 ahallam 3427
2     ########################################################
3     #
4     # Copyright (c) 2009 by University of Queensland
5     # Earth Systems Science Computational Center (ESSCC)
6     # http://www.uq.edu.au/esscc
7     #
8     # Primary Business: Queensland, Australia
9     # Licensed under the Open Software License version 3.0
10     # http://www.opensource.org/licenses/osl-3.0.php
11     #
12     ########################################################
13    
14     __copyright__="""Copyright (c) 2009 by University of Queensland
15     Earth Systems Science Computational Center (ESSCC)
16     http://www.uq.edu.au/esscc
17     Primary Business: Queensland, Australia"""
18     __license__="""Licensed under the Open Software License version 3.0
19     http://www.opensource.org/licenses/osl-3.0.php"""
20     __url__="https://launchpad.net/escript-finley"
21    
22     """
23     Author: Antony Hallam antony.hallam@uqconnect.edu.au
24     """
25    
26     ############################################################FILE HEADER
27     # example10a.py
28     # Model of gravitational Potential.
29    
30     #######################################################EXTERNAL MODULES
31     # To solve the problem it is necessary to import the modules we require.
32     from esys.escript import * # This imports everything from the escript library
33     from esys.escript.unitsSI import *
34     from esys.escript.linearPDEs import LinearPDE # This defines LinearPDE as LinearPDE
35 gross 3439 from esys.weipa import saveVTK
36 ahallam 3427 from esys.finley import Rectangle # This imports the rectangle domain function from finley
37     import os, sys #This package is necessary to handle saving our data.
38     from math import pi, sqrt, sin, cos
39    
40     from esys.escript.pdetools import Projector
41    
42     import matplotlib
43     matplotlib.use('agg') #It's just here for automated testing
44    
45 gross 3439 from cblib import toRegGrid
46    
47    
48 ahallam 3427 import pylab as pl #Plotting package
49     import numpy as np
50    
51     ########################################################MPI WORLD CHECK
52     if getMPISizeWorld() > 1:
53     import sys
54 jfenwick 3892 print("This example will not run in an MPI world.")
55 ahallam 3427 sys.exit(0)
56    
57     #################################################ESTABLISHING VARIABLES
58     #Domain related.
59     mx = 1000*m #meters - model length
60     my = -250*m #meters - model depth
61     ndx = 200 # mesh steps in x direction
62     ndy = 200 # mesh steps in y direction - one dimension means one element
63     #PDE related
64     res1=500.0
65     res2=10.0
66     res3=10000.0
67     #con=1/res
68     cur=1000.
69    
70     ################################################ESTABLISHING PARAMETERS
71     #the folder to put our outputs in, leave blank "" for script path
72     save_path= os.path.join("data","example11")
73     #ensure the dir exists
74     mkDir(save_path)
75    
76     ####################################################DOMAIN CONSTRUCTION
77     domain = Rectangle(l0=mx,l1=my,n0=ndx, n1=ndy)
78     x=Solution(domain).getX()
79    
80     kro=kronecker(domain)
81     source1=[3.*mx/8.,0]; source2=[5.*mx/8.,0]
82    
83     c1=length(exp(-length(x-source1)/(10.))); c1=c1/integrate(c1)
84     c2=-length(exp(-length(x-source2)/(10.))); c2=c2/integrate(c2)
85     sourceg=cur*(c1-c2)
86    
87     res=res1*wherePositive(x[1]-my/3)+res2*whereNegative(x[1]-my/3)*wherePositive(x[1]-my*2/3)+res3*whereNegative(x[1]-my*2/3)
88     con=1/res
89     q=whereZero(x[1]-my)+whereZero(x[0])+whereZero(x[0]-mx)
90     ###############################################ESCRIPT PDE CONSTRUCTION
91    
92     mypde=LinearPDE(domain)
93     mypde.setValue(A=con*kro,Y=sourceg,q=q,r=0)
94     #mypde.setSymmetryOn()
95     sol=mypde.getSolution()
96    
97     # Save the output to file.
98     saveVTK(os.path.join(save_path,"ex11b.vtu"),\
99     source=sourceg,\
100     res_pot=sol,\
101     res=res,\
102     curden=-con*grad(sol),\
103     efield=-grad(sol))

  ViewVC Help
Powered by ViewVC 1.1.26