Bouncing of a Jet off a Newtonian Liquid Surface

*Please let me know if the audio is corrupted again.*
A falling stream of silicone oil rebounds from a pool of the same oil. from the Center of Nonlinear Dynamics, University of Texas at Austin. This experiment can be done at home on a table top with common kitchen materials. A transcript of the narration and more information is available at http://chaos.ph.utexas.edu/research/fluids/bouncing_jet.html

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Science & Technology

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• jet
• bouncing
• liquid
• leaping
• stream
• jumping
• fluid
• dynamics
• physics
• science
• surface
• everyday
• CNLD
• amazing
• cool
• pool
• magic
• howto
• nonlinear

[TheBusayu]

does this work with water?

[MatthewThrasher]

@TheBusayu I couldn't get it to bounce with water. The surface tension of water is much higher than the surface tension of the oils used here. This led to imperfections in the film of air growing large before they were carried away by the motion of the bath and jet. I would encourage you try with oil first. Once you get the hang of it with oil, then try water. The link above gives tips on doing this at home. My papers and reports have more detailed information on how to do it at home.

[themrfj]

i thought it was: non-newtonian fluid?

[MatthewThrasher]

@themrfj The Kaye effect needs a non-Newtonian liquid for its mechanism to work, as the lubrication layer is a thin layer of shear-thinned liquid. The bouncing jet in the video doesn't. It works with a Newtonian liquid, as the lubrication layer is air.

[dgkway]

I AM BORD -.-

[gag75]

Whaaaaaaaaaaaaaaaaaaaaaaat?

[TheBusayu]

ahh ok. this can be a demo for our school's science exhibit :) thanks

[themrfj]

@MatthewThrasher Two year old comment. But thanks for responding ;)

[kamihakai]

I don't understand this T_T, what the heck is this?¿? dont tell me xD

[honestjohnnfld]

Rayleigh did a "similar thing" on the stability of newly formed jets. The surface tension can be found as a function of the time constant of the repeating motion as I recall. See his Collected Papers.

The surface tension is the restoring force.

Archibald