hi~ guys
i have came across a problem, i used hot to deformed a grid ,and in my option i want to used this surface 's velocity to drive flip sim ~ but my sim are all failed ~ so i hope someone can give me some ideas and share a HIP ~ please~

havent gotten to try 12.5 yet so i dont know if this is changed, but i believe the standard approach is to run the sim normally and then displace the cached out points.

Use field force for a basic approach, or use a sop solver in the particle stage or field vop in the volume stage for a custom mix.