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The Inverse Leidenfrost Effect | How Rwanda Built A Drone Delivery - At Up-Tube.com

The Inverse Leidenfrost Effect How Rwanda Built A Drone Delivery 5 months ago   08:38

Droplets levitate on a bath of liquid nitrogen and are spontaneously self-propelled. Thanks Audible! Start a 30-day trial and your first audiobook is free. Go to https://audible.com/VERITASIUM or text VERITASIUM to 500500.

Special thanks to Dr. Anaïs Gauthier
Physics of Fluids: https://pof.tnw.utwente.nl/

Self-propulsion of inverse Leidenfrost drops on a cryogenic bath
Anaïs Gauthier, Christian Diddens, Rémi Proville, Detlef Lohse, and Devaraj van der Meer
PNAS January 22, 2019 116 (4) 1174-1179; published ahead of print January 22, 2019

For a detailed description of the setup:

And self-propulsion is also seen: http://www.lps.ens.fr/~adda/papiers/InvLeidenfrost.avi

Other recent (hot) Leidenfrost experiments that might be interesting:
* Leidenfrost wheels: https://up-tube.com/upvideo/tyETy-rLhKb
* Leidenfrost maze: https://www.youtube.com/watch?time_continue=174&v=vPZ7sx3EwUY
* Leidenfrost explosions: https://up-tube.com/upvideo/m0fc3NwtHl4

Special thanks to Patreon supporters:
Donal Botkin, James M Nicholson, Michael Krugman, Nathan Hansen, Ron Neal, Stan Presolski, Terrance Shepherd

Thanks to Prof. Kevin McKeegan at UCLA for the liquid nitrogen

Filming by Raquel Nuno

Additional animations by Alan Chamberlain

Comments 1399 Comments

nicholas travisano
Water on dry ice would create the same effect
DJ Chardon_Power
BUt, Why iS THerE a WaVE!?!?!?
Only the French could create a physics professor who is so HAAAWT!
Tom F
And if you don't have liquid nitrogene, drop a flake of sodium on water
Wait you can just randomly contact scientists?
Elon Musk
Derek, get some sleep holy.
EYE PROTECTION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Ann Phillips
if im not mistaken this can be achieve with liquid metal poured on dry ice
Muhammad Amir
Brother you are almost a scientist
maz yn
no ones talking about the pentagram ? 5:30
Urist McDerp
cat yes good
Rose Fisher
5:30 How many fundamentalist anti-science people now screaming "See, PROOF that science is the devil" 🤣
3dgar 7eandro
Didn't understand nothing of what hat girl was saying... Souch a good pronunciation 😅
Km Mk
Why do we want to freeze embryos?
Robert Ruork
You are SO flirting with that gal !!
John Pettus
I did not understand the real world application of this. At all.
Isn't it exactly because of this effect that you're not supposed to wear gloves when handling liquid nitrogen? like if you spill it on your naked hand it'll bounce and won't cause burn (or rather, freeze), whereas if you spill it on clothes, it'll freeze the clothes and then move on to freeze the tissue underneath. Like the overclocker kingpin mentioned not wearing socks or long pants when handling liquid nitrogen during his OC runs.
Nanette Sage
I can't believe you actually went for that experiment without ANY KIND of eye protection whatsoever. I mean, you have not done this before and even though you totally trust the scientist that told you what you need to do, you STILL should be using eye protection. I am still shocked you don't start your process with "ok, before I do this, the most important thing to remember is Safety First". Then put on the proper equipment. The Eye Protection and Gloves in this case. I mean, come on. Even I saw that stuff pop a bit into a bunch of smaller bits. Who knows if something else might have happened.
Christian Hoffmann
the feel when no french scientist gf 😩
Mike Turner
That introduction between him and Dr. Gunther was cute. Clearly both were like "uh... hi, you're unexpectedly cute, um, right... science"
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How Rwanda Built A Drone Delivery The Inverse Leidenfrost Effect 5 months ago   11:46

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