In an environment with gravity, hot air is less dense than cool air, so it rises.
How does hot air interact with cold air in a zero gravity environment, in terms of movement? Does it just stay where it is? Some sort of spherical configuration, maybe with the hotter air on the outside?
For the sake of an example, imagine there's a candle burning in zero-g. I'm aware the flame will be spherical. How will the hot air around the flame act?
I found this Reddit discussion on the topic, but being Reddit there's not really a definitive answer like the kind I expect to see here.