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

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Revision 3975 - (show annotations)
Thu Sep 20 01:54:06 2012 UTC (6 years, 7 months ago) by caltinay
File MIME type: text/x-python
File size: 2531 byte(s)
Merged symbolic branch into trunk. Curious what daniel and spartacus have to
say...

1 from esys.escript import *
2 import esys.finley
3 from esys.escript.models import StokesProblemCartesian
4 from esys.finley import finley
5 from esys.finley import Rectangle
6 from esys.weipa import saveVTK
7
8
9 #physical properties
10 rho1 = 1000 #fluid density on bottom
11 rho2 = 1010 #fluid density on top
12 eta1 = 100.0 #fluid viscosity on bottom
13 eta2 = 100.0 #fluid viscosity on top
14 g=10.0
15
16 #solver settings
17 dt = 0.001
18 t_step = 0
19 t_step_end = 2000
20 TOL = 1.0e-5
21 max_iter=400
22 verbose=True
23 useUzawa=True
24
25 #define mesh
26 l0=0.9142
27 l1=1.0
28 n0=200
29 n1=200
30
31 mesh=Rectangle(l0=l0, l1=l1, order=2, n0=n0, n1=n1)
32 #get mesh dimensions
33 numDim = mesh.getDim()
34 #get element size
35 h = Lsup(mesh.getSize())
36
37 #level set parameters
38 tolerance = 1.0e-6
39 reinit_max = 30
40 reinit_each = 3
41 alpha = 1
42 smooth = alpha*h
43
44 #boundary conditions
45 x = mesh.getX()
46 #left + bottom + right + top
47 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]
48
49 velocity = Vector(0.0, ContinuousFunction(mesh))
50 pressure = Scalar(0.0, ContinuousFunction(mesh))
51 Y = Vector(0.0,Function(mesh))
52
53 #define initial interface between fluids
54 xx = mesh.getX()[0]
55 yy = mesh.getX()[1]
56 func = Scalar(0.0, ContinuousFunction(mesh))
57 h_interface = Scalar(0.0, ContinuousFunction(mesh))
58 h_interface = h_interface + (0.02*cos(math.pi*xx/l0) + 0.2)
59 func = yy - h_interface
60 func_new = func.interpolate(ReducedSolution(mesh))
61
62 #Stokes Cartesian
63 solution=StokesProblemCartesian(mesh,debug=True)
64 solution.setTolerance(TOL)
65
66 #level set
67 levelset = LevelSet(mesh, func_new, reinit_max, reinit_each, tolerance, smooth)
68
69 while t_step <= t_step_end:
70 #update density and viscosity
71 rho = levelset.update_parameter(rho1, rho2)
72 eta = levelset.update_parameter(eta1, eta2)
73
74 #get velocity and pressure of fluid
75 Y[1] = -rho*g
76 solution.initialize(fixed_u_mask=b_c,eta=eta,f=Y)
77 velocity,pressure=solution.solve(velocity,pressure,max_iter=max_iter,verbose=verbose,useUzawa=useUzawa)
78
79 #update the interface
80 func = levelset.update_phi(velocity, dt, t_step)
81
82 print("##########################################################")
83 print("time step:", t_step, " completed with dt:", dt)
84 print("Velocity: min =", inf(velocity), "max =", Lsup(velocity))
85 print("##########################################################")
86
87 #save interface, velocity and pressure
88 saveVTK("phi2D.%2.4i.vtu"%t_step,interface=func,velocity=velocity,pressure=pressure)
89 #courant condition
90 dt = 0.4*Lsup(mesh.getSize())/Lsup(velocity)
91 t_step += 1

Properties

Name Value
svn:mergeinfo /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 /trunk/ripley/test/python/finley/test/python/RT2D.py:3480-3515

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