/[escript]/trunk/doc/examples/cookbook/example10m.py
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Annotation of /trunk/doc/examples/cookbook/example10m.py

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Mon Dec 9 23:35:30 2013 UTC (5 years, 10 months ago) by sshaw
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python3ified things, replaced mixed whitespace and xrange calls
1 ahallam 3405
2 jfenwick 3981 ##############################################################################
3 ahallam 3405 #
4 jfenwick 4154 # Copyright (c) 2009-2013 by University of Queensland
5 jfenwick 3981 # http://www.uq.edu.au
6 ahallam 3405 #
7     # Primary Business: Queensland, Australia
8     # Licensed under the Open Software License version 3.0
9     # http://www.opensource.org/licenses/osl-3.0.php
10     #
11 jfenwick 3981 # Development until 2012 by Earth Systems Science Computational Center (ESSCC)
12     # Development since 2012 by School of Earth Sciences
13     #
14     ##############################################################################
15 ahallam 3405
16 jfenwick 4154 __copyright__="""Copyright (c) 2009-2013 by University of Queensland
17 jfenwick 3981 http://www.uq.edu.au
18 ahallam 3405 Primary Business: Queensland, Australia"""
19     __license__="""Licensed under the Open Software License version 3.0
20     http://www.opensource.org/licenses/osl-3.0.php"""
21     __url__="https://launchpad.net/escript-finley"
22    
23     """
24     Author: Antony Hallam antony.hallam@uqconnect.edu.au
25     """
26    
27    
28     ############################################################FILE HEADER
29     # example10m.py
30     # Create a simple 2D mesh, which is optimised for cells close to the
31     # source. Larger elements are used to decrease computational requirements
32     # and to properly fullfil the boundary conditions.
33     #
34     #######################################################EXTERNAL MODULES
35     from esys.pycad import * #domain constructor
36     from esys.pycad.extras import layer_cake
37     from esys.pycad.gmsh import Design #Finite Element meshing package
38     from esys.finley import MakeDomain #Converter for escript
39     from esys.escript import mkDir, getMPISizeWorld
40     import os
41     import subprocess as sp
42     ########################################################MPI WORLD CHECK
43     if getMPISizeWorld() > 1:
44 sshaw 4576 import sys
45     print("This example will not run in an MPI world.")
46     sys.exit(0)
47 ahallam 3405
48     # make sure path exists
49     save_path= os.path.join("data","example10m")
50     mkDir(save_path)
51    
52     ################################################BIG DOMAIN
53     #ESTABLISHING PARAMETERS
54 ahallam 3409 width=10000. #width of model
55     depth=10000. #depth of model
56 ahallam 3405 bele_size=500. #big element size
57     #DOMAIN CONSTRUCTION
58     p0=Point(0.0, 0.0)
59     p1=Point(width, 0.0)
60     p2=Point(width, depth)
61     p3=Point(0.0, depth)
62     # Join corners in anti-clockwise manner.
63     l01=Line(p0, p1)
64     l12=Line(p1, p2)
65     l23=Line(p2, p3)
66     l30=Line(p3, p0)
67    
68     cbig=CurveLoop(l01,l12,l23,l30)
69    
70     ################################################SMALL DOMAIN
71     #ESTABLISHING PARAMETERS
72 ahallam 3409 xwidth=1000.0 #x width of model
73     zdepth=1000.0 #y width of model
74 ahallam 3405 sele_size=10. #small element size
75     #TRANSFORM
76     xshift=width/2-xwidth/2
77     zshift=depth/2-zdepth/2
78     #DOMAIN CONSTRUCTION
79     p4=Point(xshift, zshift)
80     p5=Point(xwidth+xshift, zshift)
81     p6=Point(xwidth+xshift, zdepth+zshift)
82     p7=Point(xshift, zdepth+zshift)
83     # Join corners in anti-clockwise manner.
84     l45=Line(p4, p5)
85     l56=Line(p5, p6)
86     l67=Line(p6, p7)
87     l74=Line(p7, p4)
88    
89     csmall=CurveLoop(l45,l56,l67,l74)
90    
91     ssmall=PlaneSurface(csmall)
92     sbig=PlaneSurface(cbig,holes=[csmall])
93    
94     #############################################EXPORTING MESH FOR ESCRIPT
95     # Design the geometry for the big mesh.
96     d1=Design(dim=2, element_size=bele_size, order=1)
97     d1.addItems(sbig)
98 ahallam 3409 d1.addItems(PropertySet(l01,l12,l23,l30))
99 ahallam 3405 d1.setScriptFileName(os.path.join(save_path,"example10m_big.geo"))
100     MakeDomain(d1)
101    
102     # Design the geometry for the small mesh.
103     d2=Design(dim=2, element_size=sele_size, order=1)
104     d2.addItems(ssmall)
105     d2.setScriptFileName(os.path.join(save_path,"example10m_small.geo"))
106     MakeDomain(d2)
107    
108     # Join the two meshes using Gmsh and then apply a 2D meshing algorithm.
109     # The small mesh must come before the big mesh in the merging call!!@!!@!
110     sp.call("gmsh -2 "+
111     os.path.join(save_path,"example10m_small.geo")+" "+
112     os.path.join(save_path,"example10m_big.geo")+" -o "+
113     os.path.join(save_path,"example10m.msh"),shell=True)

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