The Inverse Leidenfrost Effect

Рет қаралды 1,788,271

5 жыл бұрын

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 audible.com/VERITASIUM or text VERITASIUM to 500500.
Special thanks to Dr. Anaïs Gauthier
Physics of Fluids: 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
www.pnas.org/content/116/4/1174
For a detailed description of the setup:
www.lps.ens.fr/~adda/papiers/L...
And self-propulsion is also seen: www.lps.ens.fr/~adda/papiers/I...
Other recent (hot) Leidenfrost experiments that might be interesting:
* Leidenfrost wheels: • Leidenfrost Wheels
* Leidenfrost maze: • Video
* Leidenfrost explosions: • Leidenfrost explosions
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

Пікірлер: 1 600

@Tymon0000 5 жыл бұрын

Inverse Leidenfrost: stove floating on a droplet

@wldwarrior 5 жыл бұрын

Brilliant

@sycamorph 5 жыл бұрын

To be fair, that's pretty much what it is.

@Keerthivasen12 5 жыл бұрын

😂😂😂😂

@fuzzy4461 5 жыл бұрын

@@sycamorph No it isn't?

@sycamorph 5 жыл бұрын

@@fuzzy4461 Why not? Droplet acts as a stove and heats liquid nitrogen, and floats on the gas produced.

@whatdamath 5 жыл бұрын

Tried to recreate this at home. Cat is levitating on the nitrogen but the water droplet is nowhere to be found

@davidwuhrer6704 5 жыл бұрын

I was expecting the "instructions unclear" meme. Close enough.

@yuris9089 5 жыл бұрын

Eyyyy its Anton. Nice to see that you guys all watch each others videos

@sebione3576 5 жыл бұрын

What's that, meow?

@LotusPrincess69 5 жыл бұрын

hello wonderful Anton, this is person.

@drops2cents260 5 жыл бұрын

I discovered a similar phenomenon which I call the Lazyfrost effect: During winter, my two cats don't go outside too much, but instead are levitating themselves on my bed and simulate hibernation as good as they can.

@PoFTwente 5 жыл бұрын

Thanks for highlighting our work from Anaïs Gauthier!

@vctor611 5 жыл бұрын

Anaïs is really pretty!

@dillee1 5 жыл бұрын

would that bouncing droplet pilot wave analog work with this set up? kzfaq.info/get/bejne/ja-ph711rdvFooU.html

@jluchette 5 жыл бұрын

Vctor ohmygawd stfu

@littlerhino2006 5 жыл бұрын

@@jluchette no u

@gasdive 5 жыл бұрын

Really cool. If you used oxygen for the centre beaker you'd eliminate the issue of the liquid boiling because it's got a higher boiling point than N2.

@MichaelOrtega 5 жыл бұрын

we can all agree that water droplet was riding V A P O R W A V E S

@stevethea5250 5 жыл бұрын

The scientist is so hot n cute!

@martiddy 5 жыл бұрын

Did someone said... V A P O R W A V E ?

@sendjameslove 5 жыл бұрын

That Leidenfrost A E S T H E T I C.

@nvidious6115 5 жыл бұрын

【ＲＡＲＥ】

@dashhazard8526 5 жыл бұрын

V A P O R W A V E is dead.

@besmart 5 жыл бұрын

You should really be GOGGLED UP for this bro 🤓

@lo0ksik 5 жыл бұрын

Smartass

@AxxLAfriku 5 жыл бұрын

OH NO!!! I just saw something very VERY hideous! I looked in the mirror! OH NO!! But I am the best KZfaqr of this generation so it is all good! OH YESSS!!! Thanks for you attention dear SMART

@thecoryguy 5 жыл бұрын

I think I remember hearing somewhere that small splashes of liquid nitrogen won't harm you.

@Mutantcy1992 5 жыл бұрын

You look cool if you get liquid nitrogen in your eyes.

@mikevarrecchia4264 5 жыл бұрын

@@Mutantcy1992 I appreciate the joke, however, it also sounds quite painful

@jerotoro2021 5 жыл бұрын

I was just watching Backyard Scientist drop lava into his pool, and noted that the lava initially floated on the water for a while before it sank. My first thought was "reverse (inverse) Leidenfrost", the steam from the boiling water is keeping the molten rock afloat. And here you are now doing a video ON THAT EXACT THING!

@s888r 2 жыл бұрын

What's the name of that video?

@EPMTUNES Жыл бұрын

@@s888r it’s called “Pouring lava on my pool!”

@cherylm2C6671 11 ай бұрын

Thank you for your comment!

@55455 5 жыл бұрын

"you've probably heard of the leidenfrost effect" yeah sure i have! *nervous laughter*

@fatguy6153 5 жыл бұрын

yo Idot

@Corn0nTheCobb 5 жыл бұрын

^ ironic post

@judith8161 3 жыл бұрын

Yeah right, my thoughts actually were like "yay, next time someone accidentally drips some water on the stove top, I can sound like I´m REALLY smart" :D

@jupiter_ios 2 жыл бұрын

Don’t tell me you’ve never heard of it

@sanctobellum290 2 жыл бұрын

I giggled so hard at this.

@sendjameslove 5 жыл бұрын

Me: Google, define "Indefinitely". Google: Literally, tens of minutes.

@icycloud6823 5 жыл бұрын

"unspecified period of time" or "unlimited". He probably was referring to the former.

@lucaslucas191202 3 жыл бұрын

IcyCloud But that doesn’t make sense either as he specifies how long right after. Not precisely, but I’d still consider it specified

@SuperHagrids 3 жыл бұрын

@@lucaslucas191202 It's been observed for that long and then classified as indefinitely. There's no mention that it stopped after that tens of minutes, just that they stopped observing it

@lucaslucas191202 3 жыл бұрын

@@SuperHagrids So indefinitely as in unlimited right?

@SuperHagrids 3 жыл бұрын

@@lucaslucas191202 No, indefinitely as in "We don't know really because we haven't seen it stop and we don't know if it will eventually"

@miikey_lol 5 жыл бұрын

Is the cat required for this demo? Would like to replicate this but I'm not sure If i need a cat

@ykalon 5 жыл бұрын

Cat is essential...

@superalvin7208 5 жыл бұрын

You could try but it won’t end well

@Asdayasman 5 жыл бұрын

You need a cat. Full stop.

@IceCrusheRmedia 5 жыл бұрын

There's a 50% chance that you do.

@xlxDxlx 5 жыл бұрын

I mean in most experiments you want to keep as many variables the same as possible. The lack of cat may have been why his first attempt went awry.

@FerralVideo 4 жыл бұрын

"This episode was supported by viewers like you" The nostalgia of growing up on PBS shows.

@williamforbes6919 5 жыл бұрын

So you are saying we can make a really expensive mechanical game of pong?

@bradywells1293 5 жыл бұрын

I think they already did that on Adam Savage's Tested youtube channel -- analog pong

@crocogab3674 5 жыл бұрын

Genius Idea

@oniricPrj 5 жыл бұрын

I'd buy that for a dollar!

@soylentgreenb 5 жыл бұрын

Pong was analog. No digital circuitry.

@williamforbes6919 5 жыл бұрын

@@soylentgreenb And I quote "created using his knowledge of digital circuits". It has a scoreboard, there is going to have to be some digital counting unless you think they are storing scores with a sample and hold circuit.

@ChrisMuncy 5 жыл бұрын

I loved the format of this video. It was great to actually bring in the scientist who did the experiment.

@krukerproductions 5 жыл бұрын

So that droplet is literally moving because of vaperwave

@cristianverdugogalaz8725 5 жыл бұрын

#vapenation then?...

@PhillipNutt 5 жыл бұрын

h e a d y

@william41017 5 жыл бұрын

@@cristianverdugogalaz8725 pilot wave theory

@antimatter_nvf 5 жыл бұрын

No-no-no, vapOrware

@MazeFrame 5 жыл бұрын

There is your PhD topic: Moving fluids with Vaporwave

@LostieTrekieTechie 5 жыл бұрын

Veristablium is back!

@Rattus-Norvegicus 5 жыл бұрын

Ha, I thought you said he was black.

@HarryCochrane111 5 жыл бұрын

Duke from the Vatican

@TheDarkConRises 5 жыл бұрын

Love watching Dirk's videos!

@Adeloye1000 5 жыл бұрын

Tim?

@badsyntax173 5 жыл бұрын

@@Adeloye1000 you need to ask?

@1.4142 2 жыл бұрын

They recently discovered the triple Leidenfrost effect, where water and ethanol droplets on a hot pan also bounce off of each other.

@0dyss3us51 5 жыл бұрын

You are really one of the very best youtubers, so interesting mix between science, photography and fun!

@CameronUnderwood 5 жыл бұрын

Great Video! Loved the image comparing h and h + dh, helped my understanding a lot!

@veritasium 5 жыл бұрын

I've got a really good animator who put these together in the middle of the night. I think that's essential for understanding how this works.

@CameronUnderwood 5 жыл бұрын

@@veritasium The animations in your videos are always top notch and have helped my through parts I didn't even understand throughout my degree (I'm looking at you semiconductors and magnetism!). Thanks again to you and the animator.

@dirm12 5 жыл бұрын

Really loving all these video calls with experts on scientific issues and phenomena. Hope there are more! ^^

@TheUnlocked 5 жыл бұрын

I like this thing you're doing where you call up experts. It adds that extra layer of authenticity to the video.

@thegreaterconundrum 5 жыл бұрын

3:05 "It has been observed to last for tens of (in my head: "thousands of years") minutes."

@carpo719 5 жыл бұрын

The title alone caused my finger to click that shiz. Always love these videos. Thanks again for your efforts. NOW to only find a use for the effect :)

@carpo719 5 жыл бұрын

@hyper always an option... It's a better word than poop. :)

@Haseeebo 5 жыл бұрын

That's how titles work! 😃

@googletalkfish5491 5 жыл бұрын

6:51 Hey Vsauce Michael here!

@jooplin 5 жыл бұрын

Hey VeSauce

@googletalkfish5491 5 жыл бұрын

where are your fingers?

@TheStressIsReal 5 жыл бұрын

@@googletalkfish5491 I know you can see them by just raising your hand, but HOW DO YOU KNOW THEY'RE REAL?

@googletalkfish5491 5 жыл бұрын

@@TheStressIsReal You might say, well, I know where my fingers are. I'm looking right at them. Or, I can touch them, I can feel them, they're right here and that's good.

@TheStressIsReal 5 жыл бұрын

@@googletalkfish5491 lol. Long live Michael

@Galenus0 5 жыл бұрын

3:33 I love that badass triple-droplet circling round

@doubledarefan 5 жыл бұрын

Came for the science, stayed for the cat.

@mansurrahaman9367 3 жыл бұрын

Came for science but strating with ad

@AnshulMeshram-hz1df Жыл бұрын

Me watching this one day before my Maths paper and thinking Hell ya , this looks amazing

@EthanMarkWoodruff 5 жыл бұрын

Awesome video as always!

@lighthousea4655 5 жыл бұрын

I feel very comforted when I watch your videos.

@tamojitchakraborty3871 5 жыл бұрын

Very well done, when I see your channel and I see the number of views , I understand , that world is so far behind, you have done a tremendous job. We collectively should promote such channels. Very well done.Thank you.

@BrainSlamAnimatedScience 5 жыл бұрын

The perfect application for this 3:42? Isn't it obvious?! The DVD screensaver... will it hit the corner :P

@WoLpH 5 жыл бұрын

Very interesting video. Also, thank you for pronouncing Leidenfrost correctly!

@zandersgallery 5 жыл бұрын

Really dig the application part! Was trying to figure it out myself so that was a total mind blown!

@AngadSingh-bv7vn Жыл бұрын

moving around embryos on top of liquid nitrogen is not an application, it sucks quite frankly, YOU WANNA STORE and you'll never bother making canals of super stable and continuously replenished liquid nitrogen.

@keithlowery9708 5 жыл бұрын

Bro you are just the coolest of the cool! Thank you over and over for sharing great content

@wyattb3138 5 жыл бұрын

Veritasium is finally back.

@EmazingGuitar 5 жыл бұрын

Now say goodbye again lol

@nickryckx7817 5 жыл бұрын

At least, with your "missed" attempt, you visualise what happens when two droplets merge (2:35), and it may help people to imagine neutron stars merging and the conservation of angular momentum.

@davidsweeney111 5 жыл бұрын

Im glad you are making more videos now!

@horstgunther9521 5 жыл бұрын

Great and interesting video, thanks for that. and also dr. gauthier seems to be a nice person and to love her studies, great to see

@maluraq 2 жыл бұрын

What I found interesting is that the drops form indents in the surface below so they coalesce into larger drops instead of staying independent like when the drops themselves are evaporating.

@yatint9665 5 жыл бұрын

I Read the title, I liked the video.

@pairot01 5 жыл бұрын

You should always wait to watch the video. Critical thinking is good.

@GamingThistle 5 жыл бұрын

I read your comment, I liked the video.

@checkoutthatthing 5 жыл бұрын

Super awesome video Derek.

@Ultiminati 5 жыл бұрын

Your quality is increasing, very nice.

@RangerRuby 5 жыл бұрын

I like the SciShow shirt that future you is wearing! :)

@miketurner3461 5 жыл бұрын

That introduction between him and Dr. Gunther was cute. Clearly both were like "uh... hi, you're unexpectedly cute, um, right... science"

@s888r 2 жыл бұрын

I really like the crude presentation of your videos.

@NightmareBlade10 5 жыл бұрын

I freaking love this channel!!!

@daftheck1439 5 жыл бұрын

As a french i find her English so good that i'm not so sure she's french too... OH cool video by the way!

@mr2octavio 5 жыл бұрын

No comments saying "how cute she's" or anything. Society it's changing at least on this channel subscribers.

@mystomachhurt9312 5 жыл бұрын

She's cute

@CJFear 5 жыл бұрын

I want to help her make an embryo

@amirhalloul 5 жыл бұрын

And what's wrong with sharing my positive opinion about someone's looks? I mean it's literally the first thing you see in a person and it's not something you should consider a taboo.

@Ancor3 5 жыл бұрын

Maybe she's not that cute?

@Boog_masskway 5 жыл бұрын

But aren’t you still politically incorrect if you HAD thoughts about her being cute? So what if you never spoke it out loud you’d still be carrying that thought with you and the bias that comes along with it.

@highcaliberhusband2831 5 жыл бұрын

Thank you for making awesome content!

@jhonn3908 5 жыл бұрын

thank you veritaseum, very cool

@brahzyzz 5 жыл бұрын

Can you hear "that is cool" at 2:39?

@leecaste 5 жыл бұрын

bluesn0w no pun intended 😜

@sharehbutt 4 жыл бұрын

I heard it 😂

@mihailazar2487 5 жыл бұрын

oh ... when I heard about the inverse Leidenfrost ... i was expecting floating a bubble below the surface of a fluid ... welp, I guess that would be the NEGATIVE Leidenfrost effect

@Cjnw 3 жыл бұрын

Sounds like something that reached a negative Kelvin reading

5 жыл бұрын

I have only basic knowlage of physics so thank you for the visualization. It really helped me to understand a bit more

@kasperfrancoise 5 жыл бұрын

Very proud of Dr. Anaïs my amazing cousin

@sidjindal 5 жыл бұрын

That expert is very cute. I now like science even more.

@FabiVoltair 5 жыл бұрын

Wow. The Dr. is super cute! :) Very intelligent too, without debate. Nice video too :3

@dr.spectre9697 5 жыл бұрын

love your channel man

@sasikumarannandakumar6148 5 жыл бұрын

Incredible experiment!!

@joshisnot11 4 жыл бұрын

I'm sorry, I literally forgot what the video was about the instant I saw the physicist. Also, that potential application they explained was one of the coolest things I've ever heard. It's like, Minecraft Farm mechanics in real life, except even better.

@z.d7501 5 жыл бұрын

Eventhough I am too stupid to understand this, it was very interesting.

@you1167 3 жыл бұрын

😂

@Raientai 2 жыл бұрын

"Start your year off on the right foot by listening with Audible" *2020 happens*

@runfast27182r 5 жыл бұрын

Dude! I heard about this effect in a sci-fi book (The Forever War by Joe Haldeman), but never knew the name for it. I like the application she mentioned. I won't see any value from it directly, but I can imagine applications of it to improve a lot of things. Thanks for sharing the knowledge!

@unscentednapalm8547 5 жыл бұрын

Sliding into her DMs...."Hiiiii, how are you?"

@anubhav0909 5 жыл бұрын

You should do a colab with the slomo guys on this!!

@scottjampa6374 5 жыл бұрын

yes absolutely

@WILDWOLFVisual 5 жыл бұрын

We’ve missed you!

@billschlafly4107 5 жыл бұрын

Thanks for bringing the editing back to utubye auqlity.

@jek4133 5 жыл бұрын

4:40 Is this similar to the Magnus effect?

@vaggelistheodorou8146 5 жыл бұрын

The scientist was so damn cute

@BenjaminGoose 3 жыл бұрын

IS he a scientist or just a guy who makes cool science videos? :)

@gregsimones9295 5 жыл бұрын

Wow! The brain hurts trying to wrap itself around these concepts. Most interesting.

@will2see 5 жыл бұрын

Dr. Anais Gauthier is very nice. Very very nice

@TommyCrosby 5 жыл бұрын

Someone NEEDS to make a Pong-ish game with those drops moving in straight lines xD

@josephjackson1956 5 жыл бұрын

2:20 looks like Derrick is going insane trying to figure this out lol

@miguelribeiro5165 5 жыл бұрын

Great video, I always did this in my secondary classes and never fully understood what was happening. I think discord is gettting better on videocalls ;)

@stan858 Жыл бұрын

Спасибо вам огромное за то что делаете выпуски, но я смотрю их на отдельном канале с русским переводом, жаль что я не владею английским, но я всегда хотел бы обсуждать и вести разговор на такие темы с вами

@satansamael666 5 жыл бұрын

Speaking of potential applications, I can see it used in an RNG to generate numbers by looking at the angle in which the drop goes in reference to a fixed line and add drop wise for each request of numbers.

@al1383 5 жыл бұрын

5:38 she went straight sexy highly intelligent gangsta nerd mode! I think I’m in love

@whiskeysierra07 5 жыл бұрын

I love this channel

@cauliemac9203 5 жыл бұрын

I love the most recent Veritasium videos where you talk to Scientists about their work

@newgreen956 5 жыл бұрын

The lighting looks great on the main camera! You might want to use some colour grading on your secondary camera, the difference is pretty noticeable, which (at least to me) made it look worse in quality.

@cheezuschrist1102 5 жыл бұрын

I’m a simple man: I see Veritasium notification, I click oh yeah, oh yeah

@tenpenny2919 5 жыл бұрын

Isn't it tiring to be a beta?

@cheezuschrist1102 5 жыл бұрын

Tenpenny you tell me

@tenpenny2919 5 жыл бұрын

@@cheezuschrist1102 Atleast no one told me to use this profile. And how many _Tenpennies_ do you spot in comment sections? Exactly!

@cheezuschrist1102 5 жыл бұрын

Tenpenny huh? What are you saying?

@cmbrown16 5 жыл бұрын

Awesome video!

@poodypooroo 2 жыл бұрын

This seems extremly useful for exploring Titan

@MrGilRoland 5 жыл бұрын

“You’ve probably heard of the leidenfrost effect”... Not gonna lie dude, but no, not really.

@TheCimbrianBull 5 жыл бұрын

5:31 pentagram ⛧ Devil worshippers confirmed! 👿

@Selur91 5 жыл бұрын

That satanic droplet will open the doors of hell, and all our ice cream will melt!

@gemmasterian4496 5 жыл бұрын

Wait your joking right?

@thiagocamargoalima 5 жыл бұрын

Or golden ratio...

@TheCimbrianBull 5 жыл бұрын

@@Selur91 Oh no! 😱 Not the ice-cream! 🍦 This also heralds the return of the Dark Lord, Chin Chin!

@alexwang982 5 жыл бұрын

Heptagram

@thijsvanderzee8897 4 жыл бұрын

let's go dutchiesss! Proud of my country to even make in on this channel

@michellehui6270 5 жыл бұрын

I didnt really understand the application but i love the phenomenon!

@niklaskoskinen123 5 жыл бұрын

Is it inverse though? I don't think the definition of Leidenfrost effect explicitly states which part should be producing the vapour. It's only us giving the example of a water droplet on a stove that has us thinking that there has to be a droplet at all. To quote Wikipedia (yeah, I know it's not the best source but still) "The Leidenfrost effect is a physical phenomenon in which a liquid, in near contact with a mass significantly hotter than the liquid's boiling point, produces an insulating vapor layer keeping that liquid from boiling rapidly." For example when a hot steel ball is dropped into water, it is Leidenfrost effect that keeps it from rapidly cooling and boiling the water.

@Fenrisboulder 5 жыл бұрын

the ball of metal would be almost cooling the instant it touches the wather , it is still the same effect

@niklaskoskinen123 5 жыл бұрын

@@Fenrisboulder I still understand that there is a clear change in the rate of cooling when the vapor layer dissipates, right?

@kailuigi3793 5 жыл бұрын

@@niklaskoskinen123 ye it would cool faster without the vapor layer cuz then the two energy reservoirs will have nothing in between and R will naturally equal zero media.discordapp.net/attachments/424963171225436161/538472221040050207/Capture.PNG?width=400&height=73

@HenkJanBakker 5 жыл бұрын

Inverse as in; It's not the drop that is producing the vapor nor is the surface providing the heat. So Leidenfrost yes because the effect is the same but the other requirements are flipped. The steel ball in water is just a variation on scale where the hot surface is made into the ball but still the water is providing the vapor. To make it even clearer. The water droplet does eventually disappear. The hot ball does cool and the effect stops. So either the heat runs out or the water. In this setup de droplet is basically just for the ride and does not change. I may be wrong(probably am) but that is my understanding of it.

@niklaskoskinen123 5 жыл бұрын

@@HenkJanBakker I get your point, that the mass ratios are recersed, but still, the definition doesn't require water nor does it require a droplet. It only requires a liquid (in this case the liquid nitrogen) and a mass hotter than the liquids boiling point (in this case the silicon oil). In no way, at least to my mind, does the example in the video differ from the definition.

@ishaanvatus3536 5 жыл бұрын

*_aaaah that's cool_*

@christianhoffmann8607 5 жыл бұрын

oh yeah yeah :D

@mattives6942 2 жыл бұрын

Very interesting and fun to watch thanks

@scott6725 5 жыл бұрын

OH cool, so you guy's essentially created the analog version of my dvd logo bouncing around my tv screen lol. Just kidding, awesome science man. I've always loved your channel and videos, keep up the good work. This was a fun video to watch! :)