Prof. Yu Cheng Liu and Hengyi Zhou were invited for a Keynote presentation in the 2022 Asian Microgravity Symposium held in Jeju Island, Korea. Content includes a series of investigation that have been published on Combustion and Flame, Proceedings of the Combustion Institute and International Journal of Heat and Mass Transfer surrounding numerical simulation and modelling of droplet vaporization and saturation, external group combustion and internal group combustion.