von Kármán vortex streets

[Let'sgoflying!]

Did you study this in ground school?
I swear I have flown in stuff like this! (it is not the same as cloud streets)

https://disc.sci.gsfc.nasa.gov/educ.../science_focus.shtml/vonKarman_vortices.shtml
(also: check out the Tacoma Narrows bridge.)
Von Kármán himself is a good read, having a respectable career in aviation.

 

[GRG55]

Not ground school, but in first year fluid dynamics in mech eng. the film of the Tacoma Narrows is infamous. This is also the reason cylindrical shapes exposed to the airstream are avoided on airplanes...unless one is trying to measure something.

 

[GeorgeC]

Sometimes you can see them if the snow sheds off a car's roof just right.