better quality video here
http://www.youtube.com/watch?v=XJk8ijAUCiI
harry
>
>From: Jed Rothwell <jedrothw...@gmail.com>
>To: vortex-l@eskimo.com
>Sent: Mon, February 22, 2010 8:13:00 PM
>Subject: Re: [Vo]:Smoke ring collisions
>
>That's a splendid little video, and an elegant demonstration of spin
>conservation. I urge people to see it.
>
>
>The air particles and spin both rotate 90 degrees as a result of the
>collision. Fascinating!
>
>
>It would be interesting to see how this works in a low pressure cell, close to
>vacuum. I wonder if it would resemble the computer simulations of colliding
>galaxies, in which the stars fly out in all directions, presumably because
>individual particle interactions (particles being stars in this case)
>predominate. Not at all like the ordered behavior of the air molecules in this
>video.
>
>
>Maybe the disordered effect I am thinking of could only be achieved with a
>noble gas at low pressure.
>
>
>
>- Jed
>
>
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