Trout are great up current swimmers, even when they are dead.
Interesting article.
[physicsbuzz.physicscentral.com]
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Very interesting, but the article, as opposed to the title, indicates that the fish wasn't actually swimming. Rather its body was flapping back and forth in the water eddies which propelled it forward:
As Triantafyllou explains, “You have a flow behind the obstacle, which creates a continuous stream of eddies. Each eddy contains energy and also causes the pressure in the fluid to drop… the eddy causes the body to flap back and forth, and the fish manages to extract energy.” Since all of the energy is supplied by the vortices, it doesn’t matter at all whether the fish is alive or dead, if the timing happens to be right.
Heraclitus
Level 8
July 16, 2018
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correct. the dead fish can harness the eddies so imagine a live fish?
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