I’ve started working on this at work, and tried something along running a simple square particle system and use force fields to control the flow. After failed attempts, I’ve finally realized I could just use a spiral mesh and use it to emit particles on the spot to get this vortex.
I’m still having problems with intersecting particle instances (if you have an idea how to solve them, help is appreciated). The layout could have been a bit more interesting, too, but I’ve still got no idea what I’ll be doing with this. Ideas are welcome.