Dye behavior around a rotating cylinder in water

[Hita]

Hi there.
Long time ago i saw a video of a physical phenom. The procedure was : At the bottom we have something like a puck (a circle with thickness), which is rotating. And above with have a jar of water. And when we throw some dye. We can see that phenom : there is like an invisible cylindre that follow the circle at the bottom but in water. So we have the dye who spread everywear but not in this cylindre.

I can't remember what was the name of the phenom, and i coudln't fint it with key-words on internet. Thanks for helping me.

 

[jfizzix]

Are you thinking of this?



I'm not sure if there's a specific name for this, though it works because the ink doesn't spread much, and the flow of the fluid surrounding the ink is not turbulent.
Instead of dissolved, I think one says that the ink is enfolded in the fluid.

 

[jasonRF]

To me it sounds like you may be describing a Taylor column. Try looking in the videos section of

spinlab.ess.ucla.edu

Jason

 

[Hita]

Thanks for your response.
Sorry jfizzix this not this.
Jason, this was just like Taylor column but the object was not un the water. Your answer help me a lot