Example: Lit Driven Cavity

The following script litdrivencavity.py which is available in the example directory illustrates the usage of the StokesProblemCartesian class to solve the lit driven cavity problem:
\begin{python}
from esys.escript import *
from esys.finley import Rectangle
from...
...c.solve(v,p, verbose=True)
saveVTK(''u.xml'',velocity=v,pressure=p)
\end{python}

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