[Aetbeut]

I would like to know how much particles are removed during a fixed amount of time that I set (say 60min). Is this possible with FLUENT?

I know I can set Max. Number of Steps but that is depedent on Step Length Factor which makes it impossible to set a fixed duration of time step. I am currently trying to compare number of particles removed in two different models. If I go with Max. Number of Steps with Step Length Factor, the entire duration of particle tracking is not the same between two models (due to different mesh, different B.C., etc.).

Please help!!!

[2phase]

Hi James,

you might mix up some things here.
The maximum number of steps defines the maximum lifetime of particles. In my opinion it is mainly intended to avoid infinit tracking in case particles get caught in a recirculation area.

Step length factor determines the number of steps per cell that a particle is recalculated, especially interesting for exchange terms (heat and mass transfer).

Regarding your simulation goal:
Take a look at the particle statistics options in post processing of fluent - and with that I do not mean CFD Post, because handing over prticle tracks is not automatically.
Results - Reports - Discrete Phase
There you might be able to define or calculate the particle impacts onto certain boundaries (escape bc), that is probably what you are searching for.
I haven't done this in a while so I am not so sure how I did it but it was somewhere there I think. Might be possible that you have to activate somthing before running the simulation if you do unsteady particle tracking. With steady particle tracking you can create this statistics immediately.

I hope I could help.
Martin