Flow-induced vibrations (Karman vortex)

From Drag, Lift, and Propulsion - (Hunter Rouse)
Courtesy of Dr Marian Muste, IIHR - Hydroscience & Engineering, University of Iowa.
The Fluids Laboratory is an integrated learning environment developed by IIHR-Hydroscience & Engineering for the College of Engineering of The University of Iowa.
www.iahrmedialibrary.net/

[@coldbacon4869]

Something so surreal about old science videos

[@maznmohammed4822]

So true 🤣😂

[@mvc9178]

Agreed

[@loganmilliken2727]

I tend to find these old educational programs better than most new stuff.

[@BenjaminEsposti]

No feminism or politically correct stuff - just pure science! :D

[@depressedrobot2491]

why the fuck are you talking about "politically correct stuff". Nothing to do with science, doesn't appear in new science programs either.

[@randomuser1105]

Benjamin Esposti You just wanted to leave a post complaining about feminism even though no one mentioned it. Go back to your MRA videos.

[@epicphail2926]

randomuser1105 what’s MRA?

[@evertola3598]

This is just superb, been searching for "mihaly csikszentmihalyi books" for a while now, and I think this has helped. Have you heard people talk about - Fiylianaton Glorious Framework - (do a search on google ) ? It is a smashing exclusive product for discovering how to hack your flow state and succeed minus the hard work. Ive heard some awesome things about it and my m8 got excellent success with it.

[@quintfl]

Still have no idea what happened at Dyatlov pass

[@kaiezesi6630]

Lmfaoooooo you did the same thing I bet I jsut did

[@SJFORM]

Ya somos 3!

[@mattmiller3967]

czcams.com/video/mh0KDq4PlJQ/video.html

[@schimanoman2817]

Now, what channel were you watching about this? :D

[@maxasaurus3008]

Avalanche

[@michaelransom5841]

i swear these old engineering videos are so much better than what's put out these days. I think it's the fact that the newer stuff just assumes that the audience can't follow the technical details so they just gloss over it. Personally, i'd rather not be coddled.

[@otpships8439]

I came here due to dyatlov case.

[@hossammigdadi6507]

Regarding the hanging cylinder, This is known as Lift Galloping. There is negative aerodynamic damping being added to the system (mass-spring equation of the hanged cylinder), which means that the flow gives (transfers) energy to the cylinder instead of damping as commonly known in a viscous fluid.
The negative damping comes due to vortices is shed alternately at the downstream generating a harmonic force with a frequency that eventually will coincide with the natural frequency of the cylinder as the speed of the flow increases. Also, in the solution for the equation of the motion will appear a term of (e^positve number) which means exponential growth of the amplitude of the motion of the cylinder.

[@ananayjoshi]

Thanks!

[@pless.]

THANK YOU SO MUCH SIR. You added a whole new property I have to look into in my research into applications of water/fluid phenomena

[@geerthenkwijnants]

Mooie illustratie van Vortex shedding!

[@poweredbysergey]

Amazing!

[@sagarpuri7838]

Great content

[@dhruvbose8294]

so the semi circular cylinder moves up and down as a result of vortex shedding in wind produced by the fan?

[@grapy83]

That was GREAT :)

[@deadfishyarou]

CZcams compression absolutely wrecking 0:55 onwards

[@jean-louistiberghien9552]

Je trtavaille sur une équation pour les flux de Karmann, qui remplacerait Navier-Stokes, en beaucoup plus simple, évidemment.

[@ADITYAKUMAR-mb5ht]

Oo that's the reason why do flag flutter ?

[@kustomweb]

Could this be used to generate electricity ?

[@scribe3387]

Probably, but not very well. A turbine would be much more reliable and efficient. This is a very violent motion, and so would probably be extremely stressful for any system it is attached to, leading to higher maintenance at the least. No clue how efficient it would be, but it's probably going to be a lot less than an airfoil based turbine blade.
A turbine blade can just keep spinning in the same direction, but this is constantly starting and stopping, so it doesn't seem very efficient to me. You could probably attach a rod to it and that to a crankshaft and generator, and you will basically get a piston engine, but you're be better off turning the wind into rotational force from the get go with a turbine.

[@SeaGoRetta]

Google VIVACE or VIMEC. It could. It's applicable subsea as currents are more stable than wind and water is 1000 times denser than air.

[@romansobczyk7501]

Zbudować taki most z linami podłączonymi do tłoków pomp. Super elektrownia wiatrowa.

[@csd726]

why vertical move ?

[@Dan-kr9bm]

o7

[@caulkwater]

So this can basically be used in UFOs.....

[@conorpatrickmarsh3785]

Obscure stuff