Hi, I'm an engineer, I've been dealing with Abaqus for a long time, and have experience using the various features. I used to provide helpdesk support for a long time at my previous company. There are build in ways you could easily generate DEM, but happy to script you something if none of those do what you need. I can show you how to setup, but can't run your problem, so you need to implement the solution and make the analysis solve whatever you are looking for.