Hi Ali,
as I never used grid partitioning or load balancing myself, I can only
guess. My tips are:
1) are you using Metis or Parmetis to create the partitions? Maybe they
can be tweaked to generate better results.
2) I think you have to create a more coarse grid, create the partitions
and refine then. Eike Mueller did that, he started with number of cells
= number of processors. Maybe you can find some hint in the Dune mailing
list archive.

Bye
Christoph

-- 
Une science n'était vraiment développée que quand elle
pouvait utiliser les mathématiques.    (Paul Lafargue)
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