Crazy Pool Vortex [video]

Dolphin ring bubbles are also cool and involve vortices.<p><a href="http://www.youtube.com/watch?v=wuVgXJ55G6Y" rel="nofollow">http:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=wuVgXJ55G6Y</a>

I didn&#x27;t quite get why a vortex isn&#x27;t a wave...<p>She said something about how a wave is a transfer of energy but not matter, but this seems incomplete. Obviously matter is transferring while the wave is passing.<p>I guess the technical difference that a wave will mostly return to its original state after one wavelength? But, doesn&#x27;t the vortex mostly return to its original state after one rotation? Otherwise the food coloring would disperse a lot faster.<p>Hoping there&#x27;s an easy explanation.

Super cool! Didn&#x27;t realize that underwater vortices could have shapes other than the familiar &#x27;tornado&#x27;. And apparently &#x27;physicsing&#x27; is a new verb!

This is an awesome video. Can&#x27;t stand the editing style though, with several audio tracks cut together to continually disrupt the listener&#x27;s brain. Kinda like &#x27;quick takes&#x27; of audio. It&#x27;s seemingly become popular on youtube -- the worst offenders are the Green brothers -- oh, I see this <i>was</i> edited by them. Egad.<p>It&#x27;s still a great video.

Looking at this demo makes me wonder if we could compare it to a black hole. Specifically that the vortexes are connected, that it creates a shadow (there is no light in a black hole), and is a black hole pushing light out or away (in another dimension or?)

The coolest part is at 2 minutes in when she puts food coloring in it.

It takes a couple minutes to get interesting, but it really is an interesting phenomenon that she&#x27;s looking at.

Mods, please change link to<p><a href="https://www.youtube.com/watch?v=pnbJEg9r1o8" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=pnbJEg9r1o8</a><p>This &quot;sun-gazing&quot; site looks like the worst sort of zero-value content aggregator.