A much higher percentage of extra air will get pulled “down range” from a Dyson style fan. It’s just that the air speed and total volume of those dysons are too low and they’d be noisy as hell to overcome it. But as a ratio of forced air to air that moves along, it’s a much better amount than a traditional fan.
It’s just some standard fluid dynamics. It uses “Bernoulli’s Principle” and the “Coanda Effect”.
You can look up those, or probably look up those along with “dyson bladeless fan” to find a more direct explanation. The gist of it is that the ring of moving air causes a pressure drop inside and behind the opening that causes the air from further behind the ring to rush into the low pressure area and get pulled along through it.
ColeSloth@discuss.tchncs.de 4 days ago
A much higher percentage of extra air will get pulled “down range” from a Dyson style fan. It’s just that the air speed and total volume of those dysons are too low and they’d be noisy as hell to overcome it. But as a ratio of forced air to air that moves along, it’s a much better amount than a traditional fan.
Valmond@lemmy.dbzer0.com 4 days ago
Why would that happen? If you have some non-dyson source about that I’d be interested.
ColeSloth@discuss.tchncs.de 4 days ago
It’s just some standard fluid dynamics. It uses “Bernoulli’s Principle” and the “Coanda Effect”.
You can look up those, or probably look up those along with “dyson bladeless fan” to find a more direct explanation. The gist of it is that the ring of moving air causes a pressure drop inside and behind the opening that causes the air from further behind the ring to rush into the low pressure area and get pulled along through it.
Valmond@lemmy.dbzer0.com 4 days ago
Thanks!
I remember the Bernoulli effect from school :-)