Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: RD on 15/08/2007 15:55:39

Title: Is a "doughnut" soap-bubble possible ?
Post by: RD on 15/08/2007 15:55:39

Is it possible to create a soap bubble floating in air which is a toroidal vortex (doughnut shaped)?

[This question arose from this chat thread http://www.thenakedscientists.com/forum/index.php?topic=9353.0]

Title: Is a "doughnut" soap-bubble possible ?
Post by: neilep on 15/08/2007 19:56:27

I don't see how unless it was held in place by external bubbles that maintain it's toroidal shape....like the way you see square bubbles inside a collection of other ones !!..I think !!
(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fwww.thinkingfountain.org%2Fb%2Fbubblegeometry%2Fcube.gif&hash=a777bd2564d4876790f1c3f262bf737f)

......unless.....I can think that if it was possible to create one with a machine and have it so that the bubble is rolling ...like a smoke ring !!

......beware !..........I'm guestimating here !!...but it would be cool if it could be done !!

Title: Is a "doughnut" soap-bubble possible ?
Post by: syhprum on 19/08/2007 07:44:10

It seem that they occasionally appear but are very rare and I do not think they can be produced to order.

http://www.tomnoddy.com/press.html

Title: Is a "doughnut" soap-bubble possible ?
Post by: neilep on 19/08/2007 14:21:06

Excellent link !

Title: Is a "doughnut" soap-bubble possible ?
Post by: RD on 20/08/2007 15:46:53

Thanks for the link Syhprum.

Quote

New Scientist magazine
January 17, 2004

Q: Is it possible to blow a toroidal soap bubble (one shaped like a ring doughnut)? 
And if it is, would it collapse immediately to a sphere?
Could its life be prolonged by spinning its surface, as with smoke rings?

http://www.tomnoddy.com/press.html

Great minds think alike  [;D]