DPM for steady flow with unsteady particles tracking
 

I'm trying to simulate the performance of a separator, in separating oil droplets in gas continuous phase. I'm using the DPM to inject the particles and I have two main questions:
1) In uncoupled calculations for steady continuous flow with unsteady particles tracking, why I can't see the particle tracking within the separator, i.e. the summary gives nothing regarding the fates of the particles and nothing about the trajectories from the particle tracks menu.
note that if I changed the particle tracking to steady I obtain the particles trajectories and the amount at each surface outlet.

2) Can anyone tells me how to monitor the mass flow rate of the injected particles at the outlet surface as a function of the flow time?

best regards,
Yahya