I wonder what I'm doing wrong, but PhysX collision nor PhysX fluids do not have any visible effect in my system. This very same setup is working fine on other scenes I've tested it, but not in my production scene. Any ideas where to start digging into this?
PhysX Shape "mesh" type is not supported by dynamic particles, as stated in the rollout in your screenshot. If you want particles to be affected by PhysX forces, you need to use some other shape type ("mesh" is only supported for kinematic PhysX particles).
it helped. I see now some interaction with particles and geometry. Now I need to find a way for keeping the particles inside the liquid. The liquid is there for moving particles through ducting.