The linked video is a thorough explanation of a candle flame. It’s a little long and has some rather strange humor, but it’s quite cool and extremely understandable. I highly recommend it.
Originally shared by KQED SCIENCE
Winning Entry in Alan Alda’s ‘What is a Flame’ Contest
“The winner, announced by Alda at the World Science Festival today, is the animation above, by Ben Ames, a 31-year-old Missouri-born graduate student at the University of Innsbruck, Austria, studying quantum optics.”