HI guys,

I am trying to track particles suspended in my stirred tank problem. As suggested by the user's guide, I have to use unsteady DPM for suspension. I specified 0 for both start and stop time of an injection, and this mean that the particles are only injected at the start of the calculation (see page 22-95 in user's guide). Btw, particles are injected at a line surface I created using the surface tool and I am using dynamic mesh in the domain. When I display particle tracks, thre are no particles at all in the view panel. Just for a test, I changed the DPM model to steady and used all the same parameters for injection, the particles do show up. Please let me know if you happen to have any idea what is happening there.

Thanks a lot.

ps: I have read Chapter 22 (DPM) of the user's guide very carefully and I am really frustrated.

Thanks for those who have shown interest in this probelm. I have been able to resolve it myself. It turned out that something was wrong with the surface injection from the surface I created. I changed to group injection and now the particles do show up.