/[escript]/trunk/doc/user/examples/helmholtz,py
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revision 102 by jgs, Wed Dec 15 07:08:39 2004 UTC revision 108 by jgs, Thu Jan 27 06:21:59 2005 UTC
# Line 1  Line 1 
1  # $Id$  # $Id$
2  from mytools import *  from mytools import Helmholtz
3  from esys.escript import *  from esys.escript import Lsup
4  import esys.finley  from esys.finley import Rectangle
5  #... set some parameters ...  #... set some parameters ...
6    kappa=1.
7  omega=0.1  omega=0.1
8  eta=10.  eta=10.
9  #... generate domain ...  #... generate domain ...
# Line 11  mydomain = esys.finley.Rectangle(l0=5.,l Line 12  mydomain = esys.finley.Rectangle(l0=5.,l
12  mypde=Helmholtz(mydomain)  mypde=Helmholtz(mydomain)
13  n=mydomain.getNormal()  n=mydomain.getNormal()
14  x=mydomain.getX()  x=mydomain.getX()
15  mypde.setValue(1,omega,omega*x[0],eta,n[0]+eta*x[0])  mypde.setValue(kappa,omega,omega*x[0],eta,kappa*n[0]+eta*x[0])
16  #... calculate error of the PDE solution ...  #... calculate error of the PDE solution ...
17  u=mypde.getSolution()  u=mypde.getSolution()
18  print "error is ",Lsup(u-x[0])  print "error is ",Lsup(u-x[0])
19    # output should be similar to "error is 1.e-7"
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