I want to represent personal-space by using particles as a human being

MFiX
#1

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I would like to represent personal-space by representing each particle as an individual human being seen from above.
Therefore, I wondered if it would be possible to represent this by making particles repel each other and between particles and walls without making contact.
So far, I have considered implementing Coulomb force, but I am having trouble finding any way to implement it after searching the forum.
Anyone have any ideas on how to represent personal-space with MFiX-DEM?

#2

Why not use a agent based model? too slow? MFIX DEM is made for resolving collisions, not human interactions.

#3

In the course of our research on human flow simulation, we decided to reproduce human flow with powder and granular materials, so we use MFiX-DEM, which is capable of running particle simulations.
The reason for using powder and granular materials is that we believe it is desirable to understand human flow from both a global and a local perspective, and we thought it would be better to use powder and granular materials as materials that combine both perspectives.