Can EM waves make flame to burn downwards?...?

Question

flame fo any kind burns only upwardes can it be changed?..

Answer 1

The flame burns upwards because of gravity. The hot air is less dense, so it rises. This allows the exhaust gasses to move away from the match, and fresh oxygen to feed the fire from beneath.

If you light a match in a zero gravity environment, the flame will be more circular. It will soon go out because the exhaust gasses aren't rising out of the way to get fresh oxygen to the match.

If you can figure out a way to make air bubbles in water sink instead of rise to the surface, then you'll be on your way to figuring out how to make a flame burn upside down.

Now, this is different than a forced flame like they use in welding. Because the fuel is expelled under pressure, the flame follows the direction you point it. But the hot exhaust eventually rises.

I almost forgot. An EM wave will have no effect on the flame, unless it's high power like a microwave oven. Then you're just adding heat.

Answer 2

keep in mind first what a flame is: it incredibly is mild and warmth skill emitted from some air molecules. those molecules are warm and characteristic decrease density. Thant's why they upward thrust up. whilst the burning molecules are carried out, new molecules are further to the flame from downwards and sideways (they could desire to realize this because of the fact warm molecules have lengthy previous up and left their places). They proceed making this around action, that's often used as "convection cutting-edge".