Thank you so much for the help, Rob.

The last question is to please guide me on how to create multiple nodes at the inlet so the DPM track can be solved over multiple cores parallelly as you said. How can I do that? Should I split my inlet rectangle surface into smaller sub-divided rectangles in my CAD software and then name them all as inlet? will it work? Or is there any better way? That would be great if you could refer me to a user-guide section if there is any in this regard. Thanks