Hi, I'm trying to ignite a molotov cocktail. With axiom its easy, I have fuel on the one side, remove temperature and add temperature back on the oder side at a specific point and the fire expands from there.

With the inhouse solver I can't quite get it to work. I got fuel, density and v on the left and from the right I'm trying to ignite with temperature and burn. I thought it would expand from there but I only get a fixed block of fire.

How does it work actually? I got warying points so nothing for the pyro spread I guess.