[elobb]

I believe from the user guide that it is possible to run unsteady tracking of a discrete phase with the steady flow solver.

I can track particles with steady tracking and the steady solution. However, when I change to unsteady particle tracking, set a particle time step size, number of steps and start and stop time (both zero for one injection) there seems to be no particles injected.

Can anybody help with this? I do not want to activate interaction with the continuous phase.

[johnwinter]

did you find solution to your query?

[alighaffari]

stop time for injection shoud be other than zero if you want to have injection!!

[juste]

Originally Posted by elobb

I can track particles with steady tracking and the steady solution. However, when I change to unsteady particle tracking, set a particle time step size, number of steps and start and stop time (both zero for one injection) there seems to be no particles injected.

i can see that it has been more than 4 years since u asked this, but I am still going to answer it, in case anyone else too has the same query...

i was also facing this same problem, but now i just found the solution, so thought of sharing it...

in steady DPM u can do the analysis with flow rate = 0 in the injection dialog box, but not in unsteady DPM.

when u use unsteady DPM u need to specify the flowrate..the formula for flowrate is

number of particles in a parcel * (mass of each particle / time step).

that's it.

and u can use start time and end time both zero. in this case particle will be injected only once, if that is what you want.

for more details, refer

http://www.arc.vt.edu/ansys_help/flu..._unsteady.html

[fatma123]

How to do repetition for DPM injection (surface type)