Comment 5 for bug 831050
Revision history for this message
| Anders Logg (logg) wrote Re: [Bug 831050] Re: Navier-Stokes demo does not work in parallel | #5 |
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0e1f616
(Get the code!)
On Mon, Aug 22, 2011 at 09:46:23PM -0000, Garth Wells wrote:
> First problem is that the demo make a call to
>
> mesh = refine(mesh)
>
> which doesn't not work in parallel. I will add an error to
> dolfin::refine.
>
> Second problem looks to be that the demo uses ILU preconditioning. This
> can be problematic with the zero pressure block in the matrix. There are
> some options to use a non-zero shift in the preconditioner.
There's really no reason for using refine in that demo. I'll replace
the mesh so we can get the demo to run in parallel. It would be really
good if we could demonstrate some good speedup, for this and other
demos, but this one in particular.
Parallel refinement is targeted for 1.1.
--
Anders