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.

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??

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