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::*[https://www.youtube.com/watch?v=GujarnONUkQ '''Wooden Spoon Stroking Through Water Creates Counter-Rotating Vortexes'''] (1m29s)<br> ...tion of counter-rotating vortexes when the water is disturbed by plates or spoons.

...tal nature of the system. A bucket filled with water stirred with a wooden spoon will tend to have faster velocities at the edges than the center. It is nat

...tal nature of the system. A bucket filled with water stirred with a wooden spoon will tend to have faster velocities at the edges than the center. It is nat