[grasingerm]

I am trying to start with a simple discrete element model in fluent. I ran an unsteady model with unsteady particle tracking and the DEM collision model active. I used the adaptive collision mesh. I used the default collision parameters for the collision pairs (spring constant = 1000, coeff of resititution = 0.9), and specified the wall boundary conditions as "reflect" for the DPM phase. After injecting a single particle I can track it, step by step, until it collides with a wall. At this step Fluent hangs and eventually crashes. I wish I could provide some error messages to the thread, but none are given from the solver.

Any advice on setup and/or parameters that may need changed in order for the solver to not crash when a collision takes place?