3-phase modelling of a hydrocyclone
 

I have a hydrocyclone and i am injecting a slurry with some concentration into it.
It has 3-phases in all involved in the cyclone.
So i am using the Eulerian for multiphase model, RSM for viscous..
And i set my boundary conditions accordingly like for overflow to be pressure outlet and underflow also to be pressure outlet and the back volume fractions to be 1 for both of them.
I have tried both the Mixture and Dispersed phase RSM multiphase.. and also various Discretization schemes.
and the final result is that Error: Divergence in AMG solver: k,
You have an idea about how to deal with this, please let me know !