"as one might expect from a team of under grads... a creative idea took hold" respect to people who give enough respect to the excitement and creativity of undergrads.. and not use them as labors.. or consider their ideas immature
To be fair, undergrads can be VERY immature... but from that immaturity can come some fun shit. There is no reason to make that maze, but it is cool nonetheless lol
Undergrads are much like newborn kittens. They are so curious, and eager to explore and learn, and they are also incredibly ignorant, helpless animals, who are unable to survive without the help from wiser ones. It brings me great joy to look down on them. Such simple creatures are a real pleasure to observe 👍🏿🙄
I went to the university of Bath, and I was doing my undergraduate thesis research at the same time as these guys were conducting the Leidenfrost investigation. We met because they wanted to borrow the high speed camera I was using. They showed me the sawtooth block, perhaps the first and only one they had at that point. I stupidly scraped my fingernail across it to feel the texture, and the group of physicists freaked out. I felt terrible. Sorry guys! Hope I didn't set you back too far!
The idea of scientists pulling their hair out while you scratch a piece of metal is hilarious. I wonder what that looked like to someone who had no idea what was going on.
That maze was one of the coolest things I've ever seen. I noticed this effect years ago before I ever knew what it was called. I set a frying pan that had some water on the bottom down on a hot ceramic cooktop and the pan actually moved across the cooktop. I could feel the water droplets keeping the pan from touching the cooking surface. Now I know what was causing it. Thanks!
Keep on doing that 'cause it's keeping secrets we still do not have a clue about. There is so much more out there to learn. Once or better *if* we will have reached singularity, life will be completely different. Not sure what the world will then be and look like. Cheers
Fascinating! Wonder what would happen if the serrated edges are angled more steeply? Would it give greater push in the direction of the surface vector?
Now this is the science i pictured before high school. I wish there was more stuff like this available to teach in schools. There are many possibilities utilising this effect in conjunction with other odd physics.
Very good. For reference, swirl tanks are used when quenching componets of a critical nature post heat treatment. The swirl causes the collapse of the leidenfrost effect ensuring the water is in contact with the component at all times during quenching. This ensures no disparity exists in the material quench which would cause soft/hard spots in the material metallurgy.
Just think how lucky everyone single one of us is to have the very device your holding in your hands right now. I love coming across interesting and educational things just like this. I have probably learned more from UA-cam than school could teach me. Great vid by the way 👏
@@ItsSchwifty well if you don't like it then why the fuck don't you throw your device in the bin, oh and don't forget your TV and all the other devices they die for 🤷♂️
Without me knowing I used to "study" this effect when I was around 7-9yo. While my mom was at work I was mostly alone at home, my brothers were at school and my father was working too. So mostly in the mornings I used to turn on the electric stove or the iron and throw droplets of water on them...23 years later I became an engineer with a lot of passion for science lol
@@sidatt8602 somedays I had school only from 7am to 12pm, other days from 12pm to 5ish pm. Elementary school, as you may call it in US was not a full day. As we lived like 100m from local high school and like 400m from elementary my brothers arrived around midday to eat the lunch my mother had cooked since 5am before leaving to work. It was just normal for me, small town. My brothers and I were and still are very calm, we were not like "troublemakers".
Seriously, that maze is the best part! i would LOVE to see them apply this to something like a fountain. Can you imagine how spectacular that would be???
OK.... mind blown! Witnessed this often as I am always cooking and water droplets in a pan are not uncommon... but this makes it even more fun to watch now that I have a bit more "why"!
@@ShawnJonesHellion this fits the definition of a maze? "A maze is a path or collection of paths, typically from an entrance to a goal. The word is used to refer both to branching tour puzzles through which the solver must find a route, and to simpler non-branching patterns that lead unambiguously through a convoluted layout to a goal"
@@ShawnJonesHellion Nobody is trying to trick you lol, everyone is kinda expected to figure that out. You know, using their language comprehension skills and common sense.
Yeah, the undergrads needed some scientists who spend time in the lab to make that thing... they did these tests with a labber-in-the school. (Labyrinth?)
It will run to one side if you milled the block on an angle. That can easily create table vibration when milling and throw the measurement off allow as small as quarter of a micron. It should be laser leveled and milled flat. To accomplish this the very basic milling machines have an option to manually adjust and level the tool instead of putting the product on an angle. We made these blocks for years for Teflon coating to seal packaging. It's extremely noticeable when you've done it wrong because the surface of the packets don't seal at certain points along the block
I go there, I'm in my dorm in the campus of the University of Bath writing this right now :D Coincidence I never knew about that when I clicked this video..
The only reason I became so enamored with Science was my 7th Grade Physical Science Teacher... He MADE it worth learning. I think many teachers take on a Mantle of Superiority and forget that they are there to educate and encourage further learning. This is like my Science teacher...
A maioria das pessoas sabe que a água evapora quando fica quente, afinal, praticamente todo mundo já teve a experiência de colocar um pouco de água em uma superfície aquecida e vê-la evaporar (como quando um pouco de água espirra em uma frigideira quente). Contudo, a evaporação da água depende de quão quente está essa superfície e da quantidade de água. Quando ela chegar a uma temperatura suficientemente quente, a água vai se “sentar” na superfície em forma de gota e vai levar muito mais tempo para evaporar. Esse fenômeno é chamado de Efeito Leidenfrost, e também pode fazer com que os líquidos se movimentem para cima, como você pode ver no vídeo. Nas imagens, os físicos da Universidade de Bath, na Inglaterra, usam o efeito de manipular criativamente gotículas de água líquida. Quando elas entram em contato com uma superfície que está aquecida a uma temperatura muito superior ao seu ponto de ebulição, uma camada isolante de vapor é criado em torno do líquido. Esta camada, então, impede que o líquido toque diretamente na superfície e, portanto, atinja seu ebulição rapidamente. Esse processo é facilitado pelo fato de que o vapor tem baixa condutividade térmica, o que significa que a taxa de transferência de calor entre a superfície quente e uma gota de água diminui drasticamente.
The explanation of the Leidenfrost Maze is a little deceiving. The Maze doesn't primarily rely on the steering from the minute effect that the small grooves within the ridges of the block cause... it primarily relies on the larger grooves with a constant temperature to direct the water. Notice that the water will travel in the direction perpendicular to the grooves, just as in the original experiments.
Gordon Tendick nice way! . But I think if it was always moving towards temperature gradient, then it do not satisfy what they observed ( like towards left when temperature is above ~ 500 and towards right when temp is under ~500) . I don't think gradient can change with temperature of a same surface and same heat source.
roy romano - Fool! You'd be better off purchasing a car full of microwaves and power them on around the clock. The equivalent would be to do so just for the sake of wasting money! Your idea won't move a boat. You'd only be moving the body of water the boat is in, which is ludicrously ridiculous!
For powerplants that need constant cooling.. couldn't they use the idea of directing the water around to cool it? Say they put a circular heat bank around the fuel source, and when it's above the Leidenfrost point, it curves in the direction of the circle. When it's under the point, it curves away to another area. That way, the water is constantly circulating it when it's too hot, and then once the water absorbs enough energy, it's transferred somewhere else. Imagine this is done with several circles.. and perhaps creating liquids that have different boiling points to keep it at sustainable temperatures..
Great, so that means it is doable. Square miles are nothing. Just stack it into a volume, like the human intestines, and you can easily get square miles of surface in a fairly tiny volume. I always find it funny how easily people give up these days. The problems we encounter are nothing compared with what those came before us had to face. I just wish I knew what the difference was between then and now to cause the dramatic change in spirit. In my opinion, it can only be public school that are deliberately driving the "can-do" attitude and the individuality out of students. You are a drone. You must copy what others have done. If you can't copy it, then it can't be done, and you shouldn't bother trying to get it done because you will waste your time. That is the modern public school mentality.
not to burst your bubble, but didn't they say part of the reason this works is because the water is insulated, and it evaporates slower under these conditions? If the water evaporates slower, that means the rate of heat transfer is slower. Not an ideal property of a coolant. Sure it might work, but man calm down about that public school crap. It's also an important part of the creative process to point out flaws and problems and work to correct them. Diving into something without thinking it through or even trying to anticipate problems is never a smart way to go.
Must be understood that on that kind of instalation you dont want heat to evaporate the cooling (on which this principle relays) the objective is to cool down the things the faster posible and keeping the maximun amount of coolant while not getting lost
Yeah but the point of power plants using water as a coolant is so the water evaporates into steam to push turbines. The leidenfrost effect insulates the water which severely hinders the rate of evaporation, so probably not all that practical over current methods
I just commented on a video about propelling a water droplet with wetability gradients and thought of making a ring or a square infinite loop but not a maze! Very creative, love the work. I wonder if this or capillary action is more efficient at moving water vertically.
Nothing more creative than scientists & engineers. The best artists in the world. I don't understand why the more "loose" creative fields, in which I work, continuously believe sciences are dull & restrict creativity & imagination... they must not understand what creativity is, nor what science is. Creativity & imagination are restricted to what we know & understand (and don't). The more we know, the more we can bend the rules we abide to when we don't understand them.
So this is how this effect is named! It saved my arm when I accidentally spilled molten silver on my luckily sweated palm. I only burned my hand painfully instead of melting it off instantly.
I have so many more questions now; What is the optimum temperature for producing the fastest speed of movement of the water droplets and how fast was it? What is the maximum angle it can climb? What is the depth of the grooves and have they advanced it further and used laser cutters?
I would suggest that the angle of the milling would act as a a barrier to the steam produced is the point of contact and propel the droplet in the opposite direction - which in this set-up was uphill.
actually it's not only when the thing you are pouring water is REALLY HOT, it's just when there's a HUGE difference between the temperature on the liquid and the surface (for example a hand a liquid nitrogen)
Your hand is really hot compared to the nitrogen. You need something way above the boiling temperature. Also, it depends on the heat conduction properties of the liquid.
its just steam levitation power. the trick is under 160° the water touch the plate and vaporize entirely , but above this temperature, the vapor form quick enough for push the water up and isolate the water. and all the gravure stuff are like an helix for the steam
Would it theoretically be possible to use this in place of magnetic acceleration or flux pinning in order to temporarily accelerate and move an object atop the water?
If an item is heated to temperature and Leiden Frost effect starts I think the item would sink in water because I can't see how something could float on top of water if it is surrounded by a bubble of steam
I’m sure I’m missing something, but if you heat up the bottom, don’t you run the risk of boiling whatever’s inside? I mean, as a practical application, I can’t see many uses unless you’ve get a great insulator. But that’d probably add far too much excess weight to be effective…?
+betadryl I think it would be a technological limitation. You would need enough heat to produce enough heat to lift the sheet. To heat it more, you would likely need heavier equipment, thus needing more heat
I think of you make two plates and put them close together so that a droplet can touch both of them at the same time, it will be propelled upwards. You could maybe make a tube with these ridges on the inside and get the same effect. I have the facilities to actually test this, so i may give it a shot!
I see your point here but unless the force of vapor downward exceeds then weight of the water. its not going upwards. But It would be awesome to see this tested.
"Impractical" research like this might be very useful to some inventor or scientist in the future. I'm sure back in the 1700's people called the early research into electricity a waste of time.
I don't think this would be of much use in cooling applications. The layer of vapour is a very good insulator (and liquid cooling in electronics already exists).
Maria Benkirane he means that in school teachers don't always explain correctly and it becomes the most boring thing... Or they sometimes don't know how to catch our curiosity.
What was scientific about this? Is it that they used a microscope and microscopes are science? It seems to "be" more like engineering to me, if we need to pigeonhole activities.
It's the heat rising up the block that encourages the water to travel upwards. Put a heat stop behind it and it will stop The skin is spinning to the cooler side the water in the middle is the actuator.
This is cool. I see it happen eveytime I spill water on my wood stove when filling up the water kettle to keep moisture in the air. But I didn't pay that much attention to this effect. Now all I have are questions.. Can the drops of water hold weight and if so how much? How big of drop can you use? What can we use this effect for?
I wonder if this ever happens in nature - I wouldn't be surprised if there's a hot spring somewhere where people have seen water flowing up the mountain and assumed they were crazy
Were you paying attention or what? There has to be ridges SPECIFICALLY designed for the water to go upwards. I'm pretty sure the forces of nature can't do that.
I'll always doubt nature. It has a crap ton of flaws. Like, cheetahs, they can run fast, but if they don't cool themselves afterwards they die. Frogs, they can go on land, but if they dry up they die. Cold blooded animals, pretty easy to tell the flaw there tbh.
Rigmarole it happened right infront of me in the kitchen That is why i searched it I wanted to know if ivwas the first to discover it but unfortunately nope 🙁🙁
After the eruption of Krakatoa, the hot magma propelled itself along the surrounding water at speeds of greater than 100kph. Not quite the same phenomenon, but similar. www.livescience.com/28186-krakatoa.html
Each step is like a siphon effect, part of the droplet flows down the ridge and pulls the water behind it up with surface tension. The heat simply keeps the droplets from collapsing.
an example could be like taking different colored water droplets and starting them off in different corners then betting on which gets to the center of a maze like the one shown above fastest
I love to do anything with science I wish I could join in on the fun with you guys but I lack the funding and the knowledge of knowing how so I'll just watch
I always over heated my pan and did the thing with the water but never knew what it was called, I couldn't find the words to even google it. But after many years it just popped up on my feed.
Most likely not. If you have a huge surface area and want to produce the leidenfrost effect on all of the water touching it, an ENORMOUS amount of energy would be needed to heat it and keep it heated. It might be possible to do for a short amount of time, but not pracitical.
This is a great manifestation of the so called "Ratchet & Pawl" motion explained by Feynman in one of his famous lectures. This apparent motion against the potential curve also happens in biology in the so called chemotaxis phenomenon.
Wooowwww how old is this video? Was it remastered in order to get it in colour??!?! Because the temperature was listed in some sort of ancient unit that hasn't been used since the dark ages. How did you manage to remaster the video but forget to translate the temperature into something people on this planet can relate to?
***** C'mon, using the same measurement system as the rest of the world is so uncool... It'd make communication and spread of information easier, Duh...
"as one might expect from a team of under grads... a creative idea took hold"
respect to people who give enough respect to the excitement and creativity of undergrads.. and not use them as labors.. or consider their ideas immature
That was probably the ONLY nod to the under grads...
"There is nothing as worthless or inefficient in the universe as under graduates."
- Every Professor ever
To be fair, undergrads can be VERY immature... but from that immaturity can come some fun shit. There is no reason to make that maze, but it is cool nonetheless lol
Undergrads are much like newborn kittens. They are so curious, and eager to explore and learn, and they are also incredibly ignorant, helpless animals, who are unable to survive without the help from wiser ones. It brings me great joy to look down on them. Such simple creatures are a real pleasure to observe 👍🏿🙄
@@chriswebster24 What an arrogant person you are. No self awareness.
Came to see water flowing uphill.
Was not disappointed.
MrFlippy Music that's good to hear
Skate fast and eat ass
@@SGprooo To each his own bud.
The Doom From Latveria 1 year ago
Yeah I was ready to comment about a potential letdown to save other from said letdown, but no letdowns were dished out
the Leiden frost maze is so ridiculous.
I want five.
lol
Shut up and take my money jajajaja
Alec Whatshisname, he speaks for all.
Yes, me too
floating water? Yes please!
Alec Whatshisname I kinda want to touch it...and yes I know I would cook.
As a kid I was fascinated with how water "danced" on the wood stove. Now I know more! Thanks 😊
@Repent and believe in Jesus Christ bro shut up
It's also the effect that allows to soak your hand in liquid nitrogen without instantly freezing your hand off
I went to the university of Bath, and I was doing my undergraduate thesis research at the same time as these guys were conducting the Leidenfrost investigation. We met because they wanted to borrow the high speed camera I was using. They showed me the sawtooth block, perhaps the first and only one they had at that point. I stupidly scraped my fingernail across it to feel the texture, and the group of physicists freaked out. I felt terrible. Sorry guys! Hope I didn't set you back too far!
nice! wow
i think you deserve prison
this little maneuver cost them 51 years
@@hholster8981 😂😂😂
The idea of scientists pulling their hair out while you scratch a piece of metal is hilarious. I wonder what that looked like to someone who had no idea what was going on.
That maze was one of the coolest things I've ever seen. I noticed this effect years ago before I ever knew what it was called. I set a frying pan that had some water on the bottom down on a hot ceramic cooktop and the pan actually moved across the cooktop. I could feel the water droplets keeping the pan from touching the cooking surface. Now I know what was causing it. Thanks!
Damn, the Leidenfrost effect is strong!
now please tell me:
how often did you accidently touched the tiles?
shh. It's a professional secret
You cant ask them. They floated away
@@Schoko4craft Oh no no no, not another tragic loss for the sake of science, it's been said they're still sliding up that very hot hill to this day
This is why I AM interested in science. It's stuff like this that inspires me keep on learning and experimenting.
Keep on doing that 'cause it's keeping secrets we still do not have a clue about. There is so much more out there to learn. Once or better *if* we will have reached singularity, life will be completely different. Not sure what the world will then be and look like. Cheers
"i love science"
>failed it in HS
@@user-vv1do1wg1j haha
You mean. " THIS is why I am ..."
look into flat earth , do your own experiments and see what you find. Its flat af 0 curve
Love how this goes from a demo about drops of water to the story of how undergrads are the real kings.
Fascinating! Wonder what would happen if the serrated edges are angled more steeply? Would it give greater push in the direction of the surface vector?
your a bit late mate
@@aluminium9230 To be fair I just got here too, I think the youtube algorithm is letting this video have a go around the internet (again?)
@@aluminium9230 This is the internet, time is meaningless here.
@@techstuff9198 I wish you were right.
@@nocturnaljoe9543 me too buddy
use different colored dyed water and have races
Separated, right?
Yz250fTony Color, races? RACIST 😂
Only thing they might deposit some dye which will burn onto their equipment.
TheToasties1 - Nothing beats anti-Semitism, though.
The black one would win.
An analytical mind paired with creativity and a touch of playfulness, can result in wonderful things.
"behold, the Leidenfrost Maze"
translation: enjoy the mindfuck
Medi Ding same
Medi Ding engage the cyraik videos mode
What's so mindfuck about it? They literally explained how it works.
Because it's so enlightening... it's maddening.
Listen, it looks nice and all but how can you apply this to something useful? It's like a gimmick~ =(
Now this is the science i pictured before high school. I wish there was more stuff like this available to teach in schools. There are many possibilities utilising this effect in conjunction with other odd physics.
I sometimes noticed this effect as a child when dropping water on a hot wood stove. Fascinating.
that was the most awesome thing I have ever watched in my life
I'm a simple man, I see science, I like the video.
This video is so cool. Just enough flair and the right amount of information behind it. Well done.
Very good. For reference, swirl tanks are used when quenching componets of a critical nature post heat treatment. The swirl causes the collapse of the leidenfrost effect ensuring the water is in contact with the component at all times during quenching. This ensures no disparity exists in the material quench which would cause soft/hard spots in the material metallurgy.
Just think how lucky everyone single one of us is to have the very device your holding in your hands right now. I love coming across interesting and educational things just like this. I have probably learned more from UA-cam than school could teach me. Great vid by the way 👏
Yeah we're so lucky for the kids that mine cobalt and die everyday just to power the devices we hold in our hands right now.
@@ItsSchwifty well if you don't like it then why the fuck don't you throw your device in the bin, oh and don't forget your TV and all the other devices they die for 🤷♂️
you could build logic with this. A LEIDENFROST COMPUTER
MrCool1187
Super cool
Actually it'd probably be quite hot.
Tomartyr
pshhhhhhh wachu talkin baut
Tomartyr I hav never seen a computer go go 400 degrees
WeLcOme tO mY ChAnEl
A cpu or heat sync would melt before it got that hot
hmm self-propelling steaks
Propelled right into my mouth. That needs to exist.
Laugher Cake they do exist, they're called steak factories. you just need to replace the packing department
Aren't self-propelled steaks called cows?
+Keys, Are you Indian?
This is amazing. Who knew water could flow UP!?
wow...nice
***** That was pretty sick!
I think it would also flow up if it found itself at the bottom of a volume of a non-polar liquid that's more dense than water is.
Up, down...it's all relative....
Without me knowing I used to "study" this effect when I was around 7-9yo. While my mom was at work I was mostly alone at home, my brothers were at school and my father was working too. So mostly in the mornings I used to turn on the electric stove or the iron and throw droplets of water on them...23 years later I became an engineer with a lot of passion for science lol
if you were 7-9yo then why were you at home in the mornings?
@@sidatt8602
Either he's telling us a bull shit story. Or his parents didn't give a crap about him.
@@sidatt8602 somedays I had school only from 7am to 12pm, other days from 12pm to 5ish pm. Elementary school, as you may call it in US was not a full day. As we lived like 100m from local high school and like 400m from elementary my brothers arrived around midday to eat the lunch my mother had cooked since 5am before leaving to work.
It was just normal for me, small town. My brothers and I were and still are very calm, we were not like "troublemakers".
Fake.
Thank you. I've never realised until now that I have always wondered why after a pan gets super hot, the water doesn't evaporate anymore
Seriously, that maze is the best part!
i would LOVE to see them apply this to something like a fountain. Can you imagine how spectacular that would be???
Pretty awesome until someone falls in!
fongfongy This works on people too(Joke). A new form of racing is born!
I would say disney world would love it, except for the burned children.
@@FirstLast-fr4hb Disney Satanists like your idea.
dye them different colors and race them
Then the colours mix together
Water has been the primary driver of most races using all definitions, but only now has it become the race itself.
The dye might clog up the surface ridges.
when physics undergrads have too much time
And money :)
I'm a first-year physics undergrad; I don't have ANY fucking time at the moment lmao
I'd imagine these were 3rd year undergrads doing this for their project.
@@henrystaples521 that'd be fun
Yeah, writing a business report would have been a much better use of a student's time.
I’d love to have been taught like this at school!
conservatives are going to make sure schools don't exist soon.
OK.... mind blown! Witnessed this often as I am always cooking and water droplets in a pan are not uncommon... but this makes it even more fun to watch now that I have a bit more "why"!
I never knew that the Leidenfrost Effect could be used to do this... this is really cool! Water traversing mazes!
umm no. it follows a trail. it doesn't figure out a maze. youd think scientists knew english. it actually makes it sound scammy
@@ShawnJonesHellion this fits the definition of a maze?
"A maze is a path or collection of paths, typically from an entrance to a goal. The word is used to refer both to branching tour puzzles through which the solver must find a route, and to simpler non-branching patterns that lead unambiguously through a convoluted layout to a goal"
Come on guys, the comment was posted 8 YEARS ago.
@@ShawnJonesHellion Nobody is trying to trick you lol, everyone is kinda expected to figure that out. You know, using their language comprehension skills and common sense.
Thats a one hot maze
FUCK
Yeah, the undergrads needed some scientists who spend time in the lab to make that thing... they did these tests with a labber-in-the school. (Labyrinth?)
Hahah the last thing with the labyrinth was awesome. :D
It will run to one side if you milled the block on an angle. That can easily create table vibration when milling and throw the measurement off allow as small as quarter of a micron.
It should be laser leveled and milled flat. To accomplish this the very basic milling machines have an option to manually adjust and level the tool instead of putting the product on an angle.
We made these blocks for years for Teflon coating to seal packaging. It's extremely noticeable when you've done it wrong because the surface of the packets don't seal at certain points along the block
University of "bath". Coincidence? I think not.
Isaac Young lol
I go there, I'm in my dorm in the campus of the University of Bath writing this right now :D Coincidence I never knew about that when I clicked this video..
yeah just like this one time i bought a box of tissues at walmart....walmart ends with a t...coincidence...HA! if only
Thats just like when i bought a box of staples at staples.
The University of Bath made one hot maze!
Someone should invent a water drop pinball based on this. :)
Or water droplet pong
Look up aqua pores in ever mammal semi permeable membrane aquaporion aka dupont Nafion
YOU the worthy undergrad xD
Was looking for this comment
Yeah and tilting it will short out the electronics and the over heating element will burn they mother F#cker to the ground.
If you are like "damn i heard this music a hundred times but what is it called?" It's In the hall of the mountain king.
Thanks mate, that’s exactly what went through my head.
lol dude you're awesome
shazam told me immediately ,hahaha
Though in the UK everyone knows it as the Alton Towers theme. The obvious effect of a theme park adopting a piece of classical music I suppose.
What’s it doing there!?
Imagine showing this in a school be science project. I'd be voting for this project to win!
The only reason I became so enamored with Science was my 7th Grade Physical Science Teacher... He MADE it worth learning. I think many teachers take on a Mantle of Superiority and forget that they are there to educate and encourage further learning. This is like my Science teacher...
That escalated pretty quickly, the maze is amazing! :D
A maioria das pessoas sabe que a água evapora quando fica quente, afinal, praticamente todo mundo já teve a experiência de colocar um pouco de água em uma superfície aquecida e vê-la evaporar (como quando um pouco de água espirra em uma frigideira quente). Contudo, a evaporação da água depende de quão quente está essa superfície e da quantidade de água. Quando ela chegar a uma temperatura suficientemente quente, a água vai se “sentar” na superfície em forma de gota e vai levar muito mais tempo para evaporar.
Esse fenômeno é chamado de Efeito Leidenfrost, e também pode fazer com que os líquidos se movimentem para cima, como você pode ver no vídeo. Nas imagens, os físicos da Universidade de Bath, na Inglaterra, usam o efeito de manipular criativamente gotículas de água líquida.
Quando elas entram em contato com uma superfície que está aquecida a uma temperatura muito superior ao seu ponto de ebulição, uma camada isolante de vapor é criado em torno do líquido. Esta camada, então, impede que o líquido toque diretamente na superfície e, portanto, atinja seu ebulição rapidamente. Esse processo é facilitado pelo fato de que o vapor tem baixa condutividade térmica, o que significa que a taxa de transferência de calor entre a superfície quente e uma gota de água diminui drasticamente.
The explanation of the Leidenfrost Maze is a little deceiving. The Maze doesn't primarily rely on the steering from the minute effect that the small grooves within the ridges of the block cause... it primarily relies on the larger grooves with a constant temperature to direct the water. Notice that the water will travel in the direction perpendicular to the grooves, just as in the original experiments.
What are you talking about??
Gordon Tendick nice way! . But I think if it was always moving towards temperature gradient, then it do not satisfy what they observed ( like towards left when temperature is above ~ 500 and towards right when temp is under ~500) . I don't think gradient can change with temperature of a same surface and same heat source.
If someone was to make the bottom of a boat with the same design and super heat it. I bet it would be the fastest boat in the world.
You're giving people ideas. OwO
roy romano - Fool! You'd be better off purchasing a car full of microwaves and power them on around the clock. The equivalent would be to do so just for the sake of wasting money! Your idea won't move a boat. You'd only be moving the body of water the boat is in, which is ludicrously ridiculous!
Love the way you narrate it and let him explain things going back and forth
“The hall of the mountain king” is just the perfect song for when science is used for entertainment
For powerplants that need constant cooling.. couldn't they use the idea of directing the water around to cool it? Say they put a circular heat bank around the fuel source, and when it's above the Leidenfrost point, it curves in the direction of the circle. When it's under the point, it curves away to another area. That way, the water is constantly circulating it when it's too hot, and then once the water absorbs enough energy, it's transferred somewhere else. Imagine this is done with several circles.. and perhaps creating liquids that have different boiling points to keep it at sustainable temperatures..
Great, so that means it is doable. Square miles are nothing. Just stack it into a volume, like the human intestines, and you can easily get square miles of surface in a fairly tiny volume. I always find it funny how easily people give up these days. The problems we encounter are nothing compared with what those came before us had to face. I just wish I knew what the difference was between then and now to cause the dramatic change in spirit. In my opinion, it can only be public school that are deliberately driving the "can-do" attitude and the individuality out of students. You are a drone. You must copy what others have done. If you can't copy it, then it can't be done, and you shouldn't bother trying to get it done because you will waste your time. That is the modern public school mentality.
not to burst your bubble, but didn't they say part of the reason this works is because the water is insulated, and it evaporates slower under these conditions? If the water evaporates slower, that means the rate of heat transfer is slower. Not an ideal property of a coolant.
Sure it might work, but man calm down about that public school crap. It's also an important part of the creative process to point out flaws and problems and work to correct them. Diving into something without thinking it through or even trying to anticipate problems is never a smart way to go.
Must be understood that on that kind of instalation you dont want heat to evaporate the cooling (on which this principle relays) the objective is to cool down the things the faster posible and keeping the maximun amount of coolant while not getting lost
"Power plants" transform heat into kinetic energy by way if evaporating water to drive a steam engine. The evaporation is the goal, not the problem.
Yeah but the point of power plants using water as a coolant is so the water evaporates into steam to push turbines. The leidenfrost effect insulates the water which severely hinders the rate of evaporation, so probably not all that practical over current methods
This is incredible. I can't wait to see or hear of some great applications for this effect.
Maybe a Corsair H200i?
perfect for chasing overlords early game and destroying mutalisks/scourge 👍👍👍
The temperatures beings used here are over 400* F well beyond how hot a CPU should get
I'm an undergraduate at the University of Bath too! Right now! Literally! I'm in the University on campus typing this. :D
JamesTavRule cool
Be Creative!
Neat!
ok neat bro.
totally neat bro
I just commented on a video about propelling a water droplet with wetability gradients and thought of making a ring or a square infinite loop but not a maze! Very creative, love the work. I wonder if this or capillary action is more efficient at moving water vertically.
Capillary doesn't need power. This needs high temperature.
I love scientists. We see a phenomenon and say “I could make that into a maze” or some other ridiculous idea
That's more of an inventor/engineer.
Nothing more creative than scientists & engineers. The best artists in the world. I don't understand why the more "loose" creative fields, in which I work, continuously believe sciences are dull & restrict creativity & imagination... they must not understand what creativity is, nor what science is. Creativity & imagination are restricted to what we know & understand (and don't). The more we know, the more we can bend the rules we abide to when we don't understand them.
They need to make a game with players dropping water onto the ridges, and having them get propelled into the middle and colliding...
Just for that dank name and profile picture here is a like
minecraft durt XD
So this is how this effect is named! It saved my arm when I accidentally spilled molten silver on my luckily sweated palm. I only burned my hand painfully instead of melting it off instantly.
+LikePhoenixFromAshes How cool was that experience?
Joseph Li
*BA DUM TSS
don't worry, MAN'S NOT HOT (never hot*)
That must have really hurt, but Leidenfrost has got your back.
the leiden frost effect actually only refers to the insulating steam layer between the surface and the water.
Spilling liquid nitrogen on your hand won't burn it because of the Leidenfrost effect
Someone on UA-cam actually tried it
it depends on the quantity of the liquid if it is just a drop . no effect at all , but if a bucket of liquid is pour on your body poof
frozen you
chirag khandelwal yeah but who would do this xD
chirag wrong
daniel ghfd th sh wrong
Nurdrage
I have so many more questions now;
What is the optimum temperature for producing the fastest speed of movement of the water droplets and how fast was it?
What is the maximum angle it can climb?
What is the depth of the grooves and have they advanced it further and used laser cutters?
I would suggest that the angle of the milling would act as a a barrier to the steam produced is the point of contact and propel the droplet in the opposite direction - which in this set-up was uphill.
So cool!!! Amusing too, putting them through a maze! We need more of these in museums!
next step: the drops become self aware and attack shit.
lol
i wasn't expecting to see the maze
3:08 iS tHIs PeRpeTUal MotIOn?
This video went from a simple informational science video to an insanely entertaining fun video.
Now, that's a plot twist.
actually it's not only when the thing you are pouring water is REALLY HOT, it's just when there's a HUGE difference between the temperature on the liquid and the surface (for example a hand a liquid nitrogen)
Your hand is really hot compared to the nitrogen.
You need something way above the boiling temperature. Also, it depends on the heat conduction properties of the liquid.
yeah that's what a mean...there's a huge difference in the temperatures, that's why the effect happens
ok ok XD
once upon a time this types of videos have existed over youtube,but now a days you tube is suffering from a dieases called tik tok....
They got water to solve a maze
well.. "maze"
"Until darkness falls and the cold sweeps in like the raging God He Is"-Russian bot, #1555
Just fill the maze of water :)
its just steam levitation power.
the trick is under 160° the water touch the plate and vaporize entirely , but above this temperature, the vapor form quick enough for push the water up and isolate the water.
and all the gravure stuff are like an helix for the steam
Would it theoretically be possible to use this in place of magnetic acceleration or flux pinning in order to temporarily accelerate and move an object atop the water?
If an item is heated to temperature and Leiden Frost effect starts I think the item would sink in water because I can't see how something could float on top of water if it is surrounded by a bubble of steam
@@goldyguns9545 it isn't surrounded. Only the bottom is steam.
@@mrtechie6810 Exactly, only a thin layer of steam is created between the heated surface and the water.
I’m sure I’m missing something, but if you heat up the bottom, don’t you run the risk of boiling whatever’s inside? I mean, as a practical application, I can’t see many uses unless you’ve get a great insulator. But that’d probably add far too much excess weight to be effective…?
Only one way to find out! Test the theory
*Fascinating.*
Wait, could this work reversed, as in having a thin sheet of really hot metal float on top of water?
I think the metal would cool too quickly, but there might be some useful applications for that.
+nambinhvu Well, if your energy source is sufficient to keep it stable it wouldn't.
+betadryl I think it would be a technological limitation. You would need enough heat to produce enough heat to lift the sheet. To heat it more, you would likely need heavier equipment, thus needing more heat
Think thermal nuclear submarine ie., energy and heat would not be a problem.
+Cheong Ziyong water "floats" on steel, steel doesnt float on water. It would sink but still be covered in a steamy shield for a while
If you used two sets of rigged plates, direction the droplet the same way, could the droplets Climb Straight Up???
I think of you make two plates and put them close together so that a droplet can touch both of them at the same time, it will be propelled upwards. You could maybe make a tube with these ridges on the inside and get the same effect. I have the facilities to actually test this, so i may give it a shot!
atiseru Any results yet?
I see your point here but unless the force of vapor downward exceeds then weight of the water. its not going upwards. But It would be awesome to see this tested.
atiseru Any results?
We need results
I observed this in my kitchen today and started searching about the same... Glad I found this
Is this where scientists are spending money?
Actually, I'm not even mad, that's amazing!
"Impractical" research like this might be very useful to some inventor or scientist in the future. I'm sure back in the 1700's people called the early research into electricity a waste of time.
Bruce Hernandez
Important for understanding condensation in steam turbines, as an example.
I don't think this would be of much use in cooling applications. The layer of vapour is a very good insulator (and liquid cooling in electronics already exists).
They just had to come up with something to justify the Leidenfrost Maze.
I love science. I've seen the basic experiment many times before but not like this, amazing!
You had me at Leidenfrost effect, but In the Hall of the Mountain King makes anything's interest level over 9000.
Reminds me of that MC Escher painting of the water going up staircases and falling back down to the origin, cool!!
That's great, now how's that hoverboard going scientists?
They should have put food colouring in the droplets so they would be easier to see in the maze
But then they would leave marks behind; the droplets are probably destilled water, so no minerals stay
+CrackedPlayz I'm certain you're right about that. However, I just need to do this...
*distiled
Sorry, it's a compulsion!
***** Damn, my drunk fingers must've missed the second L. Now I've made a fool of myself!
Congratulations guys.You showed me that Science is fun and cool too :D
But f*ck it let's learn something stupid and boring at school...
Владимир Чилингиров what do you mean exactly by "something stupid and boring" ?
Maria Benkirane he means that in school teachers don't always explain correctly and it becomes the most boring thing...
Or they sometimes don't know how to catch our curiosity.
Ivan Kuzmin I agree. Teachers don't really care
What was scientific about this? Is it that they used a microscope and microscopes are science? It seems to "be" more like engineering to me, if we need to pigeonhole activities.
the maze at the end...lol absolutely genius!
It's the heat rising up the block that encourages the water to travel upwards. Put a heat stop behind it and it will stop
The skin is spinning to the cooler side the water in the middle is the actuator.
This is cool. I see it happen eveytime I spill water on my wood stove when filling up the water kettle to keep moisture in the air. But I didn't pay that much attention to this effect. Now all I have are questions.. Can the drops of water hold weight and if so how much? How big of drop can you use? What can we use this effect for?
I wonder if this ever happens in nature - I wouldn't be surprised if there's a hot spring somewhere where people have seen water flowing up the mountain and assumed they were crazy
Were you paying attention or what? There has to be ridges SPECIFICALLY designed for the water to go upwards. I'm pretty sure the forces of nature can't do that.
NEVER doubt nature
I'll always doubt nature. It has a crap ton of flaws. Like, cheetahs, they can run fast, but if they don't cool themselves afterwards they die. Frogs, they can go on land, but if they dry up they die. Cold blooded animals, pretty easy to tell the flaw there tbh.
Rigmarole it happened right infront of me in the kitchen
That is why i searched it
I wanted to know if ivwas the first to discover it but unfortunately nope 🙁🙁
After the eruption of Krakatoa, the hot magma propelled itself along the surrounding water at speeds of greater than 100kph. Not quite the same phenomenon, but similar. www.livescience.com/28186-krakatoa.html
3:25 please make the music louder, i can not hear it.
This video blew my mind. i can and cannot believe what i saw. i understand the concept but this was amazing!
Each step is like a siphon effect, part of the droplet flows down the ridge and pulls the water behind it up with surface tension. The heat simply keeps the droplets from collapsing.
No
is it just me or does it seem likely that this will start a new form of gambling?
Elaborate
an example could be like taking different colored water droplets and starting them off in different corners then betting on which gets to the center of a maze like the one shown above fastest
explain
I bet you it will.
Richard Highwind was that a fucking pun
Leidenfrost maze... Awesome. Now just put some mice in there... Delicious bite-sized mice.
1Bloka get out
also known as the *mild* safety hazard 😂
That "full steam ahead" joke made me laugh more than it should have.
I love to do anything with science I wish I could join in on the fun with you guys but I lack the funding and the knowledge of knowing how so I'll just watch
What's the name of the music piece near to the end?
I'm looking for it too! Does anyone knows the title of it? :)
27REXA Me 3
In the Hall of the Mountain King.
Thanks. :)
+SciFri heard it on The social network
do i hear "in the hall of the mountain king, by evard greg" in the background?
Yes
No I'm pretty sure its Darude Sandstorm
aplze lol
I always over heated my pan and did the thing with the water but never knew what it was called, I couldn't find the words to even google it. But after many years it just popped up on my feed.
Amazing. There's got to be some profound application for this, I just wish I could think of it.
just thinking out loud: Could this technology be used to propel watercraft? Silent submarines, for example.
It would be minimal considering the weight of the metal, and insulation so you don't bake everyone inside.
Most likely not. If you have a huge surface area and want to produce the leidenfrost effect on all of the water touching it, an ENORMOUS amount of energy would be needed to heat it and keep it heated. It might be possible to do for a short amount of time, but not pracitical.
wut is that icon boi
Awessomeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Buğrahan Durukan
This is a great manifestation of the so called "Ratchet & Pawl" motion explained by Feynman in one of his famous lectures. This apparent motion against the potential curve also happens in biology in the so called chemotaxis phenomenon.
Shut up jew…stop shilling feynman
Great video. This inspires me to resume my university studies to be completely honest.
No doubt the coolest thing I've seen all week.
The Leidenfrost maze could act like agar.io except no splitting or w
Is that Sunsfan from Dota 2?
U read my mind bro
haha now i hear it too :P
would be epic if it were reavs
Wooowwww how old is this video? Was it remastered in order to get it in colour??!?!
Because the temperature was listed in some sort of ancient unit that hasn't been used since the dark ages.
How did you manage to remaster the video but forget to translate the temperature into something people on this planet can relate to?
Was the mass of the water given in american LionBananas too?
Fahrenheit is used every day in the most important part of the industrial world. ;)
Mike Williamson
Too busy being important to catch up to the rest of the planet? :p yes. That's pretty much the best retort I could come up with...
***** C'mon, using the same measurement system as the rest of the world is so uncool... It'd make communication and spread of information easier, Duh...
Mike Williamson China?