The NASA has conducted an experiment in space (Flame Extinguishment Experiment (FLEX)) where they'd initiate a combustion in microgravity in order to test the effectiveness of different fire suppressants.
There's footage of the experiment, I think these images are fascinating, https://www.youtube.com/watch?v=qQQ1OHW1_F4 .
=> Can anyone make an educated description of the phenomenon ?
The combustion forms sorts of a bubble of plasma, there seems to be several phases in the reaction, at least an equilibrium phase and an out-of-equilibrium phase, a hot transient "flame" and a colder one (the slower combustion of heptane droplets used in the experiment, cf link below), etc...
=> Is there any representation or model in physics that predicts the distribution of energy or mass throughout such processes ?
You can find more details on the experiment here https://www.nasa.gov/mission_pages/station/research/experiments/666.html#overview
Edit note: I am not a physicist and can't recognize any more relevant tags for the post; please feel free to edit
Latest Edit: See the cold flame in the link below, at 4min05sec: https://www.youtube.com/watch?v=CE7Nz78rkfQ&t=195s