Particles in container penetrating through wall

[JuhaHo]

Increasing Substeps made things better. I think there's few options.

1. On tyFlow menu Time step 1/8
   
2. PhysX Substeps 12
   
3. CCD Max step 4
   

I increased each of them and here are the latest values, which made the situation better - not perfect, but better. Which on of these is the value, I need to iterate?

I wonder, if it would be a good idea to limit the maximum speed of particles so the collision geometry would have the time to react? What would be the correct way to do that?