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-   -   divergence after patch (http://www.cfd-online.com/Forums/fluent-multiphase/125819-divergence-after-patch.html)

mehdimoradi. October 31, 2013 15:39

divergence after patch
 
Hello
I have been performed a multiphase simulation using eulerian option. Primary phase is air and secondary phase is grain. in begining of simulation i patched volume fraction of granular phase as 0.5.
solution was diverged: Error: Divergence detected in AMG solver: pressure correctio. Error object:#f.
then for solving i removed the patching process. solution was converged.
what idea is proposed to convergence happened in patching option??
Any help would be thankful.

bahare November 3, 2013 05:30

hi
iits better to reduce relaxation factor of momentum andd pressure

mehdimoradi. November 3, 2013 08:27

Quote:

Originally Posted by bahare (Post 460319)
hi
iits better to reduce relaxation factor of momentum andd pressure

Hello
Thanks for your answer;
These factors were reduced to 0.1 or lower. but the problem was diverged.
please any suggestion??

mehdimoradi. November 3, 2013 08:30

Quote:

Originally Posted by bahare (Post 460319)
hi
iits better to reduce relaxation factor of momentum andd pressure

Hello
Thanks for your answer;
These factors were reduced to 0.1 or lower. but problem diverged.
any suggestion??


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