[petsc-users] Tuning the parallel performance of a 3D FEM CFD code

[Jed Brown]

On Sun, May 15, 2011 at 15:23, Henning Sauerland <uerland at gmail.com> wrote:

> Unfortunately, I don't have any practical experience with multigrid
> methods, but I'm afraid that the conventional part won't make a good coarse
> level. Depending on the test case (large density ratios between the phases)
> the standard approximation won't do well. Anyway, I'll take a closer look at
> the multigrid topic.
>

Perhaps there is a homogenized problem for which the conventional method is
a good approximation for long-range interaction? For example, if XFEM basis
functions could be clipped and then eliminated locally. If you find a method
in the literature that you would like to try, let us know and we can give
advice for implementation.
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