system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how do bladeless fans work?

Those fancy Dyson fans. How they push the air?

Edit: thanks for the information. It's amazing the amount of thought that goes into a little fan.
gpt
They’re unfortunately not bladeless :/

There’s a small fan in the base of the fan that sucks in air at the base. Then the air is forced up into the bladeless portion and forced out of the narrow slits around the ring. 

This is the cool part because that tiny little fan isn’t enough for all that air to be pushed out of the ring. The ring is slightly tapered like an airplane wing. We take advantage of the coanda effect where the air likes to stick to the surface of the ring rather than mingle with the rest of the air. And it creates a zone of low pressure just outside the slit/ring. This zone of low pressure then coaxes passive air molecules behind the ring to flow forward in the direction of the rest of the air thereby increasing the air flow.

They also take advantage of a phenomenon called entrainment where air flowing into our out of something will force adjacent air molecules to move along in the same path, thus increasing the air flow again.

This results in a ton of air from a super tiny fan allowing you to go “bladeless”