How do I have something that is already being simmed act as a collider?

[Spark29]

Hey there! So, I've got a fire sim attached to a sphere object, but I want to create an explosion sim and have the smoke from the explosion collide with the fire-simmed sphere. How do I have an object that is already attached to a sim act as a collision object for another sim? Terribly sorry about reposting this again after a month, but I didn't get any responses on the previous topic and haven't been able to figure it out myself. Thank you for your time, regardless! Cheers!

[Svetlin.Nikolov]

Hmm, does any of these setups work for your case? https://docs.chaosgroup.com/display/...een+Simulators