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How/Why does this happen? (video)

JonM
in Classical Physics

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I've seen this one before. The phenomenon is probably known better from smoke-rings. If you know someone who smokes you've probably seen the same happen with the loops of smoke as they continue to pass each other.

 

In science these are called vortices or vortex rings in this case. The interaction between the vortices allows for such to happen. The exact physics behind it is too daunting for the likes of me. The phenomenon was first noticed by Thomson and Helmholtz (I think you know their names), and considering that Maxwell also stepped into the picture of this problem, I think I better leave it at that ^^

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Ah ok, I get it, I never saw that in smoke rings though?,

 

Was he just blowing out air from his mouth or through a snorkel?

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