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Conceived at the same time as "large bubbles".
The first part depends on the idea that a toroidal bubble is stable, and wouldn't collapse. Correct?
The second part is how to make them: my idea is by using an arrangement similar to one of those "air bazooka" set ups.
An air bazooka
can be easily made from a plastic bucket: cut a hole in the bottom, about 5 inches diameter. Tape some thick plastic over the mouth of the bucket (I used floor lino). Make sure its really taped well, all around the brim. Then sharply hit the centre of the plastic with the heel of your hand. A 5 inch invisible "smoke" ring will shoot out the other end. It can ruffle hair at 10ft or so - very stable.
Now add soap solution (that's the part that I'm not sure about), and make a smoke ring bubble!
toroidal bubble from NewScientist LastWord
http://tinyurl.com/3q86j
toroidal bubbles are possible even though theoretically impossible [xaviergisz, Dec 15 2004]
Toroidal bubble
http://www.tomnoddy.com/press.html
Look closely at the photo with Tom Noddy in it. [Ling, Dec 16 2004]
Dolphins can do it
http://earthtrust.org/gif/lordrings3.gif
Isn't the least energy solution a spherical one? But obviously not in this case. [Ling, Dec 16 2004]
[link]
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//The first part depends on the idea that a toroidial bubble is stable, and wouldn't collapse// - really ? show us a sum. |
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This is the assault weapon I've been looking for to off the money cop behind the cash register at the warehouse grocery store. |
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Well, your idea seems to depend on an assumption that isn't really correct. Even if toroidal bubbles are possible, as seems to be the case, nobody considers them even remotely stable. |
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The dolphin case probably has something to do with the greater density of the water compared with air. Perhaps the standard bubble is squashed until the centre colapses... |
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What is stability anway...? Show me a stable system and I will show you god. |
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The dolphin bubbles are not "bubbles." They are pockets of air trapped in the center of an underwater ring-vortex. They can appear as circular chains of bubbles, or the chain can join together into a bubble filament. They're held in shape by the "tornado" of water surrounding them. |
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Actually, I was going to suggest using just the same mechanism to blow toroidal bubbles as that dolphin is evidently using. They are indeed comparable. |
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Toroidal bubbles are eminently unstable, but instability alone isn't enough to stop something existing. If you set up air eddies putting energy into the system, they could keep the doughnut hole open just the same way the dolphin does it with water. |
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I have a smoke gun that blows smoke rings. I wonder if the mechanism could be adapted to blow bubble rings. |
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So... yes it's possible. But I don't think this will do it. What's stopping you from trying and letting us know if it works? |
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