I've really been stumbling on something for a few days here and I can't figure it out. I searched the forums for this, but only had found the opposite of what I'm trying to do. What I need is to advect a flip fluid simulation via pyro. I've been trying so many ways to get the micro solvers to get velocity from the pyro, but nothing is working yet… I hope someone can help me on this because I"m at a standstill with my project… thanks!
Here's one solution. I added a Source Volume DOP and connected it to the Volume Velocity input of the FLIP solver. As the Volume Path I put /obj/AutoDOPNetwork:pyro/vel, and set the SOP to DOP bindings as vel to vel.