This unique phenomenon can be easily reproduced in your pool on a sunny day. Just drag a plate and see what happens at the bottom of the pool. Your kids should try during Summer, it is truly awesome 🙂
SHARE with Friends and kids, a nice trick for them to try
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Cute Puppy Love 
Have you tried doing this on the interface layer between oil and water?
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Try blowing smoke into the vortex.
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Blow your smoke ring onto a sheet of folded paper or clear plastic – that is allowed to flare apart.
Alterations
Make the sheet really long so you can track the smoke ring’s progress
Make the top panel oscillate up and down while the bottom remains flat to see 1) if it tracks the landscape, 2) how the two rings’ speed changes, and 3) whether the rings’ curvature remains constant or alters over the unequal lengths
Make the top panel oscillate – but this time by making the sheets wave at an angle to the direction of travel instead of across it.
Make a variety of geometric alterations to the pathway. Will laminar flow recover the half-ring to its original round contour?
Repeat these experiments with ring bubbles.
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To clarify – the circle should be split by the crease in the paper or plastic. The oscillations imposed on the ‘top sheet’ should be static (but later, experiment with dynamic changes in the sheet’s landscape).
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I like the ‘passes matter” design of experiment. Elegant.
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Very cool! My daughter is a super duper science nerd and she will love this!! Thanks for sharing!
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The circular or semi-circular vortex exists as something like a wave – with a radius (wavelength) but also like a mass (particle). Nice imagery.
So, if you use a larger plate, you will probably get a larger pair of shadows and wider dispersal between vortexes. Kind of a quantum property? But with all plates being the same sizes (like protons and neutrons are of constant size), the shape should come in only one size.
I wonder whether you could use a Feynman diagram to describe them.
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This phenomenon doesn’t seem to follow the r-squared behavior of normal radiation. Or have I missed something? It seems too coherent.
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Try sending one vortex from one side of the pool and another from the other side. See if they orbit, dissipate one another, or if they exhibit other unexpected behaviors.
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Reblogged this on ABsVoice and commented:
Cool Physics !
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