I saw this simulation on YouTube in which he made a large particle using small particles and modeled the system with the MFIX software.
This is due to the large size difference between the large particle and the small particles inside the system. Because the meshes that are suitable for small particles do not hold a large particle inside.
My question is, how can this be done in MFIX and make large particles with the use of small particles?
The video link is here: https://www.youtube.com/watch?v=y_WBS85nblE