Okay, Jeff, the main file I modified is calc_force_dem.f. I have a question. When looping through neighbouring particles I in the file calc_force_dem.f, if neighbouring particle I is a ghost particle in the main particle LL’s process, will the value of particle I (such as FC, Q_SOURCE, etc.) be changed? I don’t think so, but MFIX does not perform any special operations on the following code.
