Simulating particles & liquid in a cyclone

[JuhaHo]

Now what,

I have iterated to find correct gravity value. This value makes particles going down too slowly but the same time it's high enough to ruin the flow elsewhere.

Would it make any sense to have two gravity operators: one above and one below the fluid operator? Then I would just use the timing option to tell which one should be used at the given particle age.

I really need to have some progress with this. Anyone?