High speed camera reveals water-vacuum shockwave!
HTML-код
- Опубликовано: 7 сен 2024
- So I've been putting the new high speed camera through its paces....
For a long time I've enjoyed tormenting students with water in a vacuum tube. It makes a chinking sound... but why?
Now for me.... you gotta bear in mind Ive been working with vacuums for over 20 years..... to me this is like watching the sun rise and seeing the earth spinning. But its always fascinating to see people reaction to this. Maybe I should do a react video on it! :-)
Many thanks to all those who support this channel through Patreon and made this video possible.
/ thunderf00t
This is exactly the kind of person who needs a high speed camera
Speed gonzales needs one too.
or
WWW.SUPERSLOWMOTIONHARDCOREPORN.COM
Mattsoup YES!!!!!
I hope Thunderfoot never uses the camera to "send nudes"!
s4.postimg.org/nh6sbsfb1/T_FOOT.jpg
Filming that in front of a sunset was brilliant. Great video.
That high speed camera is worth every cent right there.
Awesome work
Glad to see you here Dave!
Dave, maybe you should do a tear-down of it... "bahhh, brittle plastic" XD
EEVblog Think he's going to let you take it apart?
Don't turn it on... take it apaaaarrrt..
Dave
Ah perhaps this is what my mercury was doing!?
In your pump video?
Cody, you NEED one of these Phantom's bro.
Cody, did you ever do a video on this?
Would be kinda difficult to watch inside, wouldn't it?
Ryan,
1. Stop pretending like you know what cavitation is now.
2. Cody’sLab is a dumbass who failed school and doesn’t know anything beyond cheap tricks. In comparison to Thinderfoot he is an ant.
What an interesting video, I learned something new today. Thanks Thunderf00t, that was cool!
Love your channel BYS. :)
TheBackyardScientist you should spread the word by like doing it on your channel
John I bet it was the sound of the water falling after if formed the small cavities, it can fall in an instant in a vacuum, whereas in a pressurized environment, it has to fall past the gases.
He should try this in the dark to see if he gets any flashes from the sudden compression.
yeah like that sonicboom crab
i think it wont work, high speed camera usually needs lots of light.
vapor pressure barrier right?
KnifeKnut it's simple cavitation (the water is literally boiling and then being compressed back into a liquid in extremely fast) and the sound is from the bubbles "popping" which is something submarines work hard to avoid.
Sonoluminescence ?
Production quality's really ramped up in this video. Nice job!
Bob Fred yeah! I agree!
Production value also went up by about £15000
It's like he's taking the channel's funding and actually directly investing it all back into making greater content. .. It shows! ..and it doesn't surprise me one bit.
I am a scientific glassblower and have made glassware for the study of cavitation and nucleation over many years and the noise from within the liquid has been long studied to silence propellers on submersible vessels as they move through the water.
I made something similar to show a client how "noise" emanates within the glass tubes, only to be told by the client " it must be the glass that is making the "noise". We reproduced a vessel in stainless steel and took the vac down to "10 to the minus ridiculous" and he was shocked that the "noise" was louder. Excellent video by the way.
I wonder if you played some sounds next to the vial you would see some repeating pattern of cavitation bubbles
DevelopedBear that who'd be cool!
Great idea.
cymatics
You shud only use water that was made using clean Hydrogen and clean Oxygen!
Kinsei yeah, and apply various freqquencies of ultrasound through it as well.
Actual water hammer effect recorded. Water mass against glass without the cushion effect of air. Great experiment!
Lauren Southern is as much a journalist as Ana Kasparian.
Cloe Jarozenski why are you posting this on a science video
Cloe Jarozenski Why? Could you at least say this on a video where it actually would make sense? Stop grabbing for attention here and go to the other videos he's made about it.
Get out of here with your political comment, this is a place for science not choosing which side of the political debate is stupider...
Lauren actually went out with a camera and crew, I think that actually puts her ahead of a googler.
You're*
I have spent over 40 years design systems to avoid cavitation and column recollapse problems, but have never seen it so eloquently demonstrated. thanks for posting.
Yay back to science!
RiotHouse Next video will be about little masochist babies in the comment section bitching when it's not about science but coming to see the video by the thousands to bitch about it and how those same pussies don't watch scientific videos from the same creator at all.
If Thunderf00t was in it for money he would only make controversial videos about recent topics. You can be happy al you want but the numbers speak for themselves and they're against you.
Shouldn't it raise a few red flags when someone who's know as a genius completely disagrees with you? If people really think this guy is smart, how can they simply about face whenever they think something different? It makes no sense.
>genius's
Someone's trolling.
***** Meme arrows are fine anywhere. The fact that I'm on RUclips is a moot point.
2017 ; no
2018 ; wait
2019; RUclips .. okay. Let recommend it now!
jony johan yea, me too. Why did I have to wait 2 years to find this gem.
@Eric Eric 2019 : Dude Spoil Dude repeating a stupid meme like he came up with it and nobody else ever heard it before.
That is so bizarre. Great choice of subject matter for the camera.
Several years ago i worked in a factory where i built and tested high pressure pumps. Back then we worked with pressures up to 5000bar, wich is 72518,87 psi. One of the biggest problems with water under high pressure is cavitation, which is caused by water-vacuum shockwaves. They can cause temperatures as high as the surface of the sun and destroy almost every material. We used ruby to reinforce the nozzles of the blast pipes, because hardened steel could not take the force.
The plungers and valves had to be exchanged quite often - after only a few weeks, many parts of the inside of the pump, where water experienced a mix of high pressure and suction, looked like Swiss cheese that took a blast of a shotgun.
We used filtered water, so it was not a problem of particles.
NOW THIS IS THE THUNDERFOOT THAT I KNOW
Certainly awesome.
The movement creates spots with so little pressure that the water evaporates acnd creates the bubbles of vapor, but as everything is water, there is no surface tension to prevent collapse, whih creates further zero-pressure zones.
A-ma-zing!
Try attaching a speaker to it to see if that's enough to collapse and expand the bubbles, and shoot the high speed camera again.
leerman22 instant ultrasonic cleaner.
When pumps do this we call it cavitation. Cavitation is often caused by the suction side of a pump being restricted, which causes low pressure zones. The effect can be quite damaging as the bubbles that form collapse causing water hammers under extreme agitation due to the motion of the pump impeller. Neat!
i wish you were my father thunderfoot u_u
But the Dark Adonis is best dad evah.
then you would grow up a leftist Killary bootlicker.
> So everybody who disagrees with you is a leftist sjw?
what makes you say this nonsense?
it is so demonstrably wrong, I can not conceive of a way it could crossed your mind, unless you are a brain dead moron.
Formal Proof:
my friend disagreed with me on the size of the toilet seat i made yesterday -- he is not SJW.
MichaelKingsfordGray
because adults do not exist. If you knew cognitive psychology you'd know adults have the same attitudes kids have. They do the same things kids are said to do, but in a different more socially accepted way. Humans are humans until the day they die
Appearances do no reprecent your mental development. I thought about this and like to think of it as me always being a child, as i gained concoiusness as a child and continued being me since, only that now i know a lot more, and became even more concious about the enviroment i live in. Being an "adult" is just a label society assigns to you at an arbitrary age (or after an arbitrary ritual has being performed, like in some tribes). I think accepting such a silly and meaningless label is pointless. You will always be yourself, regardless of what others call you.
What a great demonstration! It looks like a phenomenon known as cavitation. Changes in pressure cause the water to vaporize (become a gas) under negative pressure (vacuum) and then collapse or condense into the liquid state when the pressure exceeds the vapor pressure. When he agitates the water and it sloshes around there is a pressure wave created. Pumps and propellers do the same thing. A cavitating pump sounds like it's full of marbles or rocks. The action of vaporizing and collapsing will erode a pump impeller. He was asking the wrong professors. A mechanical or chemical engineer would have explained it.
Thunderf00t you are a God.
There is no god TheGreekPotato, gotta rip that band-aid off now you'll thank me later.
Fry from adventure time?
Haha Rick and Morty
Atheist K47 no he is my god that's why it says you are my god. I can see him I worship he is my god.
Once you see it, it makes perfect sense. At the same time, it is truly beautiful. Showing tiny negative universes popping (winking) in and out of existence.
One of the most awesome things I’ve ever seen! You should sell those contraptions... I’d buy one just for the hammer effect sound alone!
It took me half of the video, to get a grasp of the physics that't going on there. But now I understand. Thank You.
pressure effects in fluids causing liquid to transform to gas state, equal to having oversized pumps causing cavitation.
Beautiful demonstration, cool project !
Beautiful. It's like the water is repeatedly tearing and zipping back up.
Same sound and reason when you hear pipes " Clanking". great job !
This is astounding stuff! I would suggest handing this off to teaching professors as this kind of material would be ideal for getting students not only interested in science, but helping them understand the material as a teaching aid.
you should send this to concussion experts,
it reminds me of CTE
As an engineer my educated guess is you are hearing the hammer shock of the water impacting the end of your side tubes, or even hitting the sides of the main tube without a thick gas barrier to soften the impact.
The strong waves traveling and reflecting about the tube would also provide wave overlaps that will create moving low and high pressure areas that will cause the water to quickly create expanding and collapsing vapor pockets.
love the intro
Watching this video changed my life. The world around us holds so much information, and it's all so beautiful.
song name :
Ticker - Silent Partner
its amaizing to se those "empty bubbles" appear and be gone on,I assumed that the water in the vacuum always remained unchanged, it's great to see this kind of phenomenon on earth and make us think "why?"
I'd love to do these scientific things for living, but I am an idiot
Me too
same
potato
If you keep telling a fish that he's only a fish, he will never learn to fly.
@Reno Simpson We idiots are only limited by the weights of our wallets
Now that footage is worth gold. finally sombody who puts a high speed camera to good use
So.... does the water attempt to hold it's density and when one of those vacuum bubbles collapses it pulls at it'self to make new ones in other places or what?
My guess is that the turbulence of the water concentrates energy at specific points within the water and that concentrated energy is enough to cause the water to evaporate forming tiny pockets of water vapor. Once the energy dissipates sufficiently the water vapor becomes liquid again and the bubble disappears.
I guess we'll have to wait for Phil to publish a paper on this and explain it to us after a few more experiments. I'm certain the ESA or NASA would love to have a bit more data on the behavior of water in a vacuum.
AlucardNoir I think you are spot on with that explanation
That's exactly how cavitation works. And that's what we're seeing here!
> or what?
a compression wave
What a neat illustration of cavitation. There is extremely high pressure generated when those bubbles collapse, enough to tear a pump apart when it happens.
A 20 sec intro is a bit too long imo, but it looks awesome!
A couple things I noticed. There were tiny amounts of debris and particles in the water. From what I can gather, it seems like that the "Cluster bombing" effect the "bubbles" were producing was possibly a result of the vacuum shock wave smacking into the particle and stopping, producing said visible "bubble" for those tiny moments of time.
I also found it a little interesting that the "bubbles" were bending the light and I would theorize that if you were to look at a large enough "bubble" close enough, you wouldn't even know you were looking through two layers of glass and a bubble. It would essentially be invisible.
Are you gonna do more slow-mo videos?
TheBestWatson No, he will never use that quite expensive high speed camera, for no particular reason.
When he gets more acid to drop
Nah he just bought the $15,000 camera just to do this one video. Think he's throwing it away afterwards
TheBestWatson I guess so he bought a very expensive camera for it...
this video is basically a small demo for his camera
I love that intro+when he gets to use his expensive equipment
When you just come to TF's channel for science stuff, and you see politics over take the comments
But will it blend?
that is the question
That is called a water hammer effect. It happens as valves are slammed shut and the water SUCKS a vacumm into the line and it collapses.
top 10 video iv watched on youtube maybe top 5
Not only is this one of the coolest videos you've done, it's also artistically beautiful. The pacing, the water apparatus, the music, even the setting are all excellent. Well done!
You act like you never seen bubbles before.
there are invisible alt righters hitting the glass to confuse you
viermidebutura lmao
This is amazing. I bet we're the first humans in history to ever see this. Thanks for the video
Coolest thing I've seen in awhile. Thanks for sharing.
The water (under vacuum ) simply rips open / is torn open by the force of the shaking and then implodes just as quick as it is torn open. these are virtual bubbles just as virtual particles appear in space-time by quantum fluctuations.
The energy of the shaking is transferred into ripping open the water, just as the shaking/vibrating of space time is transfering energy into virtual particles.
nature abhors a vacuum
Sadochrist and that kids, it's this one guy trying to show that he knows something on the subject of vacuums
nathaniel holland-pass
Apparently you don't get the joke.
Why pick on the weak
Sadochrist if that was a joke I don't want to live in this world, I'm moving to Canada where there is bacon
James Courchane fun? Profit? Both?
This awesome for studying 3-dimensional waveforms. Imagine gravity/spacetime behaving like this.
Aside from that, stunning and beautiful.
This so perfectly explains the rattling coming out of Trump's head.
Boom. Drops mic.
The crazy thing about cavitation is it makes a vacuum seem like an actual thing, rather than an absence of things.
Bubbles of nothing.
Now THAT'S something!
this is without a doubt, THE most amazing thing i have ever seen. thank you for this.
is there more potassium hammer action to come ?
It's the void making the H 2 O molecules slapping together making the metallic clanking sound... I'm a big fan of this video.
"Suzy Marsh" took down the Lauren videos. I have 2 hypotheses: Thunderf00t hired someone to take down the videos, giving him a reason to double down or Lauren's goon took down the video to make Thunderf00t look like shit.
I just find it strange that he is aparrently so naive as to think anybody believes that some person actually has an irrefutable copyright claim against it, considering how he has handled this sort of thing in the past, which must be his assumption seeing as he has not addressed it at all. Then again, maybe he is just biting the bullet and letting his cowardice be exposed now in the hopes that the videos being gone will make people forget in time. I have always found him sketchy with respect to his personal attacks, but this move has taken away most of my remaining respect for him.
I know right? He didn't even say a word about it, which is pretty abnormal for Thunderf00t. I expected him to do something about it, but just as you said, he seems to be using it to his advantage in hope that people will just forget about the videos and move on. It must be hard to live with that big of an ego.
Oy m8s, i don't know if you're still there but what was this about?
it's really quite beautiful, with the bubbles creating a lensing effect of the background...great stuff!
So the sounds are caused by the sudden collapse of the vacuum bubbles in the tube?
Sean Ramey. Yes
It is called hydraulic shock, and we in the plants have a lot of problems with them. When liquid on its boiling point is moving it makes these things. Great video!
That is the same principal of liquid pump cavitation that damages the impellers. Great video will have to show this to our maintenance techs.
I wonder what the criteria are for the bubble nucleation sites to appear where and how as they do...and reappear/collapse. It couldn't be from contamination/impurities because the water involved here is distilled. This messes with my brain :)
The cavitation seems to appear around imperfections in the glass. The major one at the corner where a small tube connect to the large cylinder.
Yeah good question; I am also somewhat surprised about the apparent ease with which the water seems to give up its surface tension and forms bubbles; the dynamic pressure generated by that shaking is probably only a fraction of an atm. Maybe this leftover water isnt that pure though? This is whats left after the distillation; presumably less pure than the vials that were taken off. If the water was super-pure, would this still happen? Supposedly pure water has a very high 'tensile stress', or ability to support negative pressures.
Disco Steve it’s the water rapidly changing state. And water in liquid state has a very low compression ratio like 2%. But gasses water has a 100% compression ration.
This gives me shivers for some reason... Idk, there's something about those bubbles that just really creeps me out...
Whats the song?
I don't know the quality of your vacuum, but I'd say you've got yourself boiling water, as the pressure increases and decreases locally you get boiling expansion, followed by collapse due to the water pressure, followed by boiling and collapse as the pressure waves move about.
This is an awesome video
Your like Bill Nye except you're actually a scientist!
1. bill nye is as much a scientist as anyone else. literally all you need to be doing to be one, is performing, and documenting science.
2. thunderf00t is no where near as valuable or useful as bill is, in almost any way you could manage to imply.
The Berserk Horse Bill Nye is an idiot not a scientist but an engineer still an idiot
Examples of his idiocy, please.
Global Warming. Man is destroying the world.
Ray Simmons are you saying that global warming is false?
the vacum looks the same as the ones when u break the bottom out of a beer bottle great stuff man
Source of music in the slowmo?
facebook.com/LeStorieDiGioRusso/videos/1238672526204429/?video_source=pages_finch_main_video
@Jugo Betrugo Do you have an idea what's the name of the song?
Le Storie Di Gio Russo é Quasi Amore
Thanks, but I actually just like the music, without that annoying speaking on top :) Couldn't find it anywhere -.-
me too "-.-
Wow thunderfoot, this is so great. Thanks a lot.
I love how the setting sun is reflected in the bubbles
6:16 i've seen that shape before
yes we can watch it for 50 minutes! you should do such a video :) there're so many videos with simply background lounge music that last for 4 hour and more. and your picture is unique of a kind.
Is there a way to measure the energy released?
Why..?
There's something called cavitation that's a problem with ships propellers, it apparently deforms the surface of propellers, that's been mentioned in engineering documentaries, and in Hunt For Red October when Ryan wanted to make the Red October they were pointing torpedoes at them and force them to periscope depth, he was like "stick us in reverse," captain was like "we'll cavitate, they'll hear us" (something like that, I'm not that good at remembering dialogue off movies verbatim).
So I think at least some people are aware this kind of thing exists.
Does this have something to do with that popping sound you get when you crack your knuckles?
The sound you hear when "cracking your knuckles" is actually the gas bubbles that form in the fluid between your joints... when compressed, the fluid produces small gas bubbles that will pop, resulting in the cracking sound you hear. It's also the reason why you usually have to wait a while before being able to pop the same joint again (i.e. knuckles), the gas has to build back up.
m.ruclips.net/video/n3IYmdy6d4Y/видео.html
Very cool video. I have a counter-argument: when you shake the vessel open to atmosphere with an air bubble in the leg, you are compressing it, ever so slightly, but enough to dampen out the momentum of the water against the glass. There are certainly other forces at play dampening the impact, like surface tension. That said, the water impacting the glass in this scenario wouldn't amount to much.
When you shake the sealed system, you aren't compressing the vapor bubbles very much; the dominant action is condensing that vapor once it has that brief kick, which rapidly collapses the bubble. When the bubble completely collapses, it creates a brief high pressure surge, which is probably what is making the tapping sound on the glass. I think you're spot on about the followup bubble formation after a collapse; I think they are preferentially forming on nucleation sites as the rarefaction wave follows the pressure wave. Since the whole system is sitting just at the vapor pressure of water, it doesn't take much rarefaction to undergo a state change.
This has strong implication in piping systems. If anyone's been around a pump that sounds like it's pumping coarse sand or gravel, it's this cavitation that you're hearing, slowly (or sometimes quickly) destroying the pump impeller.
So would this heat up the water?
Wouldn't the cavitation bubble release energy as it collapses?
Yes but it would take way more energy swinging it back and forth. Might as well just heat it via other means.
Sound is energy.
@@thomasfplm yes, you are right.
Never SEEN a water-vacuum shockwave before, but I have HEARD them. Siphoning water out of a creek for downstream irrigation, if I block the intake, it pulls a vacuum for a moment, then the water comes back up the pipe and collapses the vacuum bubbles. The multiple-surface slap sound is similar to what's heard in this video, but not as clinky (it's black plastic pipe).
what was that song? i hear it everywhere
Ticker by silent partner. Copyright free RUclips music.
This reminds me of the way a helium balloon behaves floating inside the cabin of a vehicle that is accelerating forward. The balloon will travel forward inside the vehicle as the car accelerates forward and you are being pressed back into your seat. Slam on the breaks and the balloon travels backward inside the vehicle as you are being "thrown" forward. The bubbles in the vacuum tube here are behaving similarly in regard to their direction of motion within the apparatus as it is jiggled back and forth creating an alternating acceleration/deceleration action. The pressure waves within the water, created by the jiggling back and forth, are causing the vapor bubbles to form, travel, and collapse along the changing pressure gradients within the liquid. I suspect that if you vibrated the apparatus at just the right frequency that you could get a foam to form that would fill the available space.
I found this video particularly fascinating considering my personal affinity for the behavior of bubbles suspended in liquid as it relates to pressure gradients created by gravity. :-) This ties in well to illustrate the behavioral relationship of acceleration and gravity and could even be a crude model to illustrate the formation and propagation of gravity waves. Although that last bit might be going just a bubble too far.
Shouldn't water boil in vacuum?
Great explination! As soon as you started breaking it down i instantly understood
SONG AT 5:10 PLSSSSSSSSSSSSSSSSSSSS
Ticker by Silent Partner. It's copyright free RUclips music.
I'm glad to see that new camera put to good use. This is a cool effect I wasn't aware of. Very interesting!
I love the sound of water vapor cavitations collapsing under vacuum.
+Thunderf00t That is quite simply the most amazing thing I have seen my entire life!
No idea how I ended up here or why I watched the whole video but I LOVE SCIENCE so a big thanks from me!
What you also have to consider is that the displacement of the water remains the same. The bubbles that are created are substituted at the top of the water.
The slow motion shot is mindblowing! I've seen a similar effect of the normal shots in Christmas light bulbs toped with glass tubes filled with alcohol I think. The big bubbles apear and dissapear with the heating of the tube, even when holding it on the hand.
It's good that you are honest enough to take videos, in which you are wrong, down.
These are the sorts of Thunderf00t videos that I absolutely love. On a side note, I imagine this is what your blood will look like when you have a crash inside the Hyperloop.
That was surprisingly epic, its like some sort of quantum shift. Water has amazing properties.
this channel is simply much, much more than school.
Ive never seen that type of nucleation before, Amazing. Thanks
First thing came to my mind to describe this was "Beautiful..."
Cavitation bubbles. When I heard that sound it usually means a pump is destroying itself due to a lack of net positive suction head or simply a lack of fluid.
This got me thinking about space, and how this would represent the big bang theory on a miniature scale, and time is relative, sped up or slowed down.