/[escript]/trunk/finley/test/python/RT2D.py
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Annotation of /trunk/finley/test/python/RT2D.py

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Revision 5707 - (hide annotations)
Mon Jun 29 03:59:06 2015 UTC (3 years, 9 months ago) by sshaw
File MIME type: text/x-python
File size: 3217 byte(s)
adding copyright headers to files without copyright info, moved header to top of file in some cases where it wasn't
1 sshaw 5706
2 sshaw 5707 ##############################################################################
3     #
4     # Copyright (c) 2003-2015 by The University of Queensland
5     # http://www.uq.edu.au
6     #
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     # Development until 2012 by Earth Systems Science Computational Center (ESSCC)
12     # Development 2012-2013 by School of Earth Sciences
13     # Development from 2014 by Centre for Geoscience Computing (GeoComp)
14     #
15     ##############################################################################
16    
17 sshaw 5706 from __future__ import print_function, division
18    
19 jfenwick 3772 from esys.escript import *
20     import esys.finley
21     from esys.escript.models import StokesProblemCartesian
22     from esys.finley import finley
23     from esys.finley import Rectangle
24     from esys.weipa import saveVTK
25    
26    
27     #physical properties
28 sshaw 5705 rho1 = 1000 #fluid density on bottom
29     rho2 = 1010 #fluid density on top
30     eta1 = 100.0 #fluid viscosity on bottom
31     eta2 = 100.0 #fluid viscosity on top
32 jfenwick 3772 g=10.0
33    
34     #solver settings
35     dt = 0.001
36     t_step = 0
37     t_step_end = 2000
38     TOL = 1.0e-5
39     max_iter=400
40     verbose=True
41     useUzawa=True
42    
43     #define mesh
44     l0=0.9142
45     l1=1.0
46     n0=200
47     n1=200
48    
49     mesh=Rectangle(l0=l0, l1=l1, order=2, n0=n0, n1=n1)
50     #get mesh dimensions
51     numDim = mesh.getDim()
52     #get element size
53     h = Lsup(mesh.getSize())
54    
55     #level set parameters
56     tolerance = 1.0e-6
57     reinit_max = 30
58     reinit_each = 3
59     alpha = 1
60     smooth = alpha*h
61    
62     #boundary conditions
63     x = mesh.getX()
64     #left + bottom + right + top
65     b_c = whereZero(x[0])*[1.0,0.0] + whereZero(x[1])*[1.0,1.0] + whereZero(x[0]-l0)*[1.0,0.0] + whereZero(x[1]-l1)*[1.0,1.0]
66    
67     velocity = Vector(0.0, ContinuousFunction(mesh))
68     pressure = Scalar(0.0, ContinuousFunction(mesh))
69     Y = Vector(0.0,Function(mesh))
70    
71     #define initial interface between fluids
72     xx = mesh.getX()[0]
73     yy = mesh.getX()[1]
74     func = Scalar(0.0, ContinuousFunction(mesh))
75     h_interface = Scalar(0.0, ContinuousFunction(mesh))
76     h_interface = h_interface + (0.02*cos(math.pi*xx/l0) + 0.2)
77     func = yy - h_interface
78     func_new = func.interpolate(ReducedSolution(mesh))
79    
80     #Stokes Cartesian
81     solution=StokesProblemCartesian(mesh,debug=True)
82     solution.setTolerance(TOL)
83    
84     #level set
85     levelset = LevelSet(mesh, func_new, reinit_max, reinit_each, tolerance, smooth)
86    
87     while t_step <= t_step_end:
88     #update density and viscosity
89     rho = levelset.update_parameter(rho1, rho2)
90     eta = levelset.update_parameter(eta1, eta2)
91    
92     #get velocity and pressure of fluid
93     Y[1] = -rho*g
94     solution.initialize(fixed_u_mask=b_c,eta=eta,f=Y)
95     velocity,pressure=solution.solve(velocity,pressure,max_iter=max_iter,verbose=verbose,useUzawa=useUzawa)
96    
97     #update the interface
98     func = levelset.update_phi(velocity, dt, t_step)
99    
100     print("##########################################################")
101     print("time step:", t_step, " completed with dt:", dt)
102     print("Velocity: min =", inf(velocity), "max =", Lsup(velocity))
103     print("##########################################################")
104    
105     #save interface, velocity and pressure
106     saveVTK("phi2D.%2.4i.vtu"%t_step,interface=func,velocity=velocity,pressure=pressure)
107     #courant condition
108     dt = 0.4*Lsup(mesh.getSize())/Lsup(velocity)
109     t_step += 1

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svn:mergeinfo /branches/4.0fordebian/finley/test/python/RT2D.py:5567-5588 /branches/lapack2681/finley/test/python/RT2D.py:2682-2741 /branches/pasowrap/finley/test/python/RT2D.py:3661-3674 /branches/py3_attempt2/finley/test/python/RT2D.py:3871-3891 /branches/restext/finley/test/python/RT2D.py:2610-2624 /branches/ripleygmg_from_3668/finley/test/python/RT2D.py:3669-3791 /branches/symbolic_from_3470/finley/test/python/RT2D.py:3471-3974 /branches/symbolic_from_3470/ripley/test/python/finley/test/python/RT2D.py:3517-3974 /release/4.0/finley/test/python/RT2D.py:5380-5406 /trunk/ripley/test/python/finley/test/python/RT2D.py:3480-3515

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