What is Cavitation? (with AvE)
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- Опубліковано 16 лип 2024
- The basics of fluid cavitation, including demonstration from AvE.
If you subject a fluid to a sudden change in pressure, some interesting things can happen. You can cause tremendous damage to moving parts, or you can harness this destructive power in many beneficial ways. Thanks to AvE for supplying the demonstration for this video. If you like seeing the insides of tools and industrial machinery check out his channel: / @arduinoversusevil2025
Related AvE videos:
Part 1 • Video
Part 2 • Video
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My disparaging remarks are taken out of context! I blame the clapped out Bridgeport.
Don't ruin the mystery!
He could have told us to keep our Richard out of a venturi at least.
Is that an Alex Steele reference?
*Always* blame the clapped out Bridgeport!
Your Canadian politeness shines through all your work.
cAvEtation? I have no idea what that means but loved the video.
So this is where the legends hang out
TONY! I miss your face!
um Elliot, TOT != AvE (though they are equally as cool #fiteme)
ToT in the house!
This Old Tony is this a crossover episode?
What an awesome surprise to see one of our favorite channels use our gauge!!! It looks like you could use a differential pressure gauge with a higher range. Would you want us to send out a free gauge with a 0-30PSI range? (we also have a 20 and 40)
Gauging from your response...you guys are awesome :D
Don't do it, or else well have to start calling you a shill, or practical engineerstar. Our both.
Corpo Shill Vid
Personally I use 300-600psi gauges...but then my water comes in at almost 200psi..so when I get a surge, and something pops, it's a 60ft geyser....
@@sonofnone116 I agree with that, Shill-star ruined it for me. He's worse than Linus for making everything a add and taking products and or money ( Linus Sebastian tho never faked his way, and worked hard unlike Wrangle-prick, huge sellout it's all about a pay check)
Arduino versus Evil.
That's like finding out Kramer's first name.
Kramers name? Mike. Lol
It's Cosmo Kramer.
It's on his channel header. Also all over the internet if you google it. Instead you waited for a youtube video to tell you what you wanted to know. Good job!
Sorry AvE brings it out of me
It's like seeing the face of God.
It's like seeing your kindergarten teacher drink a beer.
Or hearing the preacher swear.
Nevermind the man behind the curtain.
I have always assumed it stood for "Arsehole vs Engineering"
I had no idea that AvE video i watch all that time ago was for you. Great colab guys.
DIY Builds Seems like that video was forever ago.
So glad it showed up in my recommended
Right? I just saw this.
Just a shame nobody new will ever watch those videos...
When Grady said this was an international collaboration between Canada and the United States I assumed he was the Canadian since he seems so polite and wholesome and AvE was American given his blunt sense of humour. Upon viewing Grady's profile and discovering he is from Texas I learnt a lesson about prejudice :P.
That is Canadian humour, or he ain't Uncle Bumblefuck
Canadians are nice, but we swear a lot!
@David Boerboom he's French -Canadian, no need to be naturalized, if a person speaks Engligh with a funny French accent and swears like a sailor, he's definitely a natural born Canadian...
AvE is from Canuckistan and it's easy to spot, because he can actually pronounce 'aluminium'.
AvE even has the Canadian accent
Grady: Proceeds to drawing with much time and care.
AvE: "Look at that worthless sh* drawing".
😂😂😂😂Molson
As a draftsman by day and machinist by night, I can confirm that the drawings are always worthless. Even my own
@@user-me8hc3bs7i I assume a good drawing has to include both all necessary dimensions, as well as choose to define the most convenient dimensions. Is that right? Or people just like to complain?
@@arkie87 Sometimes its simply staring at your own work so long that you can't see mistakes. Like submitting a paper and then realizing a word in the first sentence is misspelled even though you checked it 12 times.
Other times it comes down to drafting standards that keep you from "over dimensioning" a drawing. This mainly comes into play when you have both baseline and chain dimensions. Every dimension has a tolerance, every time you stack dimensions you stack the tolerances, and over dimensioning can create a conflict where you technically have two dimension windows you're trying to hit.
Can't believe I am just finding this now. I love both these channels, but am surprised to see them together. They are both pretty clearly typical engineers, but from opposite ends of the sanity spectrum.
Big thanks to AvE for the demonstration, and all the Patreon supporters making these videos possible. To learn more, visit www.patreon.com/PracticalEngineering
Big thanks to you for making these nice videos !
You know you let the dude flip us all off? :)
Nice, I watched that attempt at making the first design... and was wondering how it was going to work.
AvE video was fun, and its nice to see what it was about.
cool collab! got some closure on that video he made 😂😂
Worked as a throttleman on a submarine in the US Navy, we used venturi to draw vacuum in condensors. Also had to listen to hydrophones to make sure that we did not cavitate.
Kevin Agnew
I was on a surface ship! We cavitated anytime we accelerated too quickly and it was powerful enough to make the whole ship shake. Being in control of all that power was one of my favorite parts of standing throttleman watch.
Well that blows my The Hunt for Red October quote right out of the water!
♪♫ Stop, de-cavitate and *listen~* ♪♫
All ahead 1/3! Make 4 knots to nowhere!
Man! I wish I could use that in my job history, "Worked as a throttleman on a submarine..." Don't bump into many guys that can claim that. Cool, very cool.
I love AVE been watching for years, why is UA-cam just now showing me this vid? You have an awesome channel too. Big fan!
You make fluid mechanics a practical and fun topic that invites you to watch your videos. The general opinion says that if someone took the time to prepare and share something special, it is up to the rest of us to offer the courtesy of seeing it, thank you for your generosity. ...
Great video and explanation, but I thought that I should point out that most of the bubbles you are creating are from the dissolved gasses in the water. This is observed by watching the bubbles and how far they travel past the area of low pressure. If they were purely water vapor bubbles they would collapse much sooner. The dissolved gasses coming out of solution are what prevent a lot more damage from being done to equipment such as boat propellers, because they cushion the vapor bubble collapse. When you have a system such as a condensate pump where the air and noncondensable gasses have been removed, the vapor bubble collapse can be much more violent and destructive.
Ahh, I spot a steam plant operator!
TheSirGoreaxe
Guilty.
Nice comment!! Thanks!!
dothemathright 1111
Cool, I've never seen the test tube thing, but that is cool.
@dothemathright 1111 I have done those syringe experiments years ago and allmost all my bubbles did disappear extremely fast.
I assume that collapsing steam bubbles also could be the reason that water that does not yet boil make a "coarser" sound than boiling water. Bubbles appear at the bottom of the kettle but then collapse as they rise. In boiling water they reach the surface.
Thanks for sharing. There was a documentary on water cavitation where they used cavitation to really efficiently heat water, it was a spinning cylindrical rotor assembly with lots of shallow round holes, encased in a tight fitting round housing with an inlet and outlet for the water and while rotating, the water passed through and underwent cavitation and rapidly heated in the process. I think the docco was called “Equinox it runs on water”
Interesting demo.
My dad worked in the water treatment/delivery business for over 40 years. His specialty was back-flow protection, but he also had to deal with cavitation issues. I learned a lot from him about these subjects as a kid, sitting around the dining table.
Some of the pump "guts", both large and small, that I got to see were pretty amazing.
Hard to imagine if you haven't seen some of it.
This was a great watch. I've spent a lot of time around watercraft and had a basic understanding of how destructive and counterproductive cavitation can be. This gave me a much fuller understanding of it. Hats off to AvE for joining this, and I've also just subscribed to this channel as well. It will come in handy for becoming a self taught engineer! Tons of respect for all the UA-camrs that devote their time to teaching others the ways of the enginerds and Jedi. Keep your stick on the ice.
You take criticism really well and the quality of your videos is always spectacular! Also thank you AvE for all the hard work!
Two of my favorite channels together!
I love that you simply acknowledged the criticism and moved on, without spiraling into a cycle of self pity and doubt. That’s an engineering skill that can’t be taught, but a necessary skill as there’s always gonna be someone better qualified who’ll tear your work apart, along with your spirit, and you just gotta pick up the pieces keep moving along.
Ok. Confession time. I am no Engineer. Rather I'm the guy with all the Psych qualifications that my Engineer friends secretly laughed at when we were at Uni. Some 20 years ago now. My passion being Depth Psych.( Although thats not my Practice) . So, really interesting to witness this colab. The "low pressure" style/tone/flow of Practical Engineering vs the "High pressure " style of AvE. And the unconscious tone then creating a moment of dissonant "cavitation", which while a joke, nevertheless was still included at the expense of ......And whatsmore; at the moment the low pressure segwayed to the high pressure. All the while, the topic being what it is.
I love learning. That's why I watch both these channels.Yet, I never expected to take home an observation of this kind, by clicking on this vid. Thank you.
GentleMAAAANNZZ welcome back to the shop 👌👌
*edit - Mike Davison
I read that in his voice
Was there any shmoo in the video?
No, it's "GentlemAAAAANZ" ;)
there was a distinct that of skookum and chooching
i wrote that saying it out loud in his voice haha!
Best UA-cam combo yet
Alec and Alex was pretty damn good, too.
You've never seen good mythical morning then
AnarchistAaron The most ambitious crossover event in history.
Get smarter every day and jerry rig everything in on this
I’m only here bc AvE and he was hardly even featured.. clickbait if you ask me.
Ps. This guys bland narrative and approach to something that should be intriguing almost put me to sleep. NEXT!
Collab between two of my favorite channels. I remember watching AvE try to make that part a while back and it is a nice surprise to see it was for your channel!
I love that the communities around these channels are connected, it gives it the same feel as like the Marvel franchise where it's our *real* universe 🤣 And guys like this and AvE, and This Old Tony are absolutely awesome! I'm pretty sure I've seen every video they've done, and honestly, there's not a single bad one! And yea, AvE is a friggin mystery! TIL the full name of Arduino vs Evil, so now we're one step closer to seeing his face lol. ToT shows himself in at least one video, so the mystery can be abated on that one, but I swear, the amount of knowledge that is stored inside the brain department or Mr. AvE (I *think* his name might be Ralph, I think I heard someone slip one time and called him by name, but not 100% on that haha) But seriously, the vocabulary and his ability to "tongue-tangulate" is absolutely astonishing, and I will straight up Google any references or terms if I don't know them, just in hopes to keep up with the info! Anyway, I love that science, engineering, and the like are popular and presented in an interesting way. Keep 'em coming!
I remember watching the machining video and wondering what the destination was...awesome collab!
You just gave me PTSD from my engineering drafting class. Your lines are perfect, well done.
You can imagine what AvE would say about your drawings X-D
Excellent work, thumbs up to Ave also, I've admired his realistic tool and tool manufacturing appraisals as well, which are equally matched by his dry sense of humour. Keep em coming. Thank you
I haven't been subscribed to you for very long but I've been watching his videos for years. He is by far my favorite UA-camr along with Ian from forgotten weapons.
Great video!
A super high-speed camera on that acrylic apparatus could be interesting
High speed macro lens at least, even a microscope
Practical engineering needs to join force with Smarter Everyday to produce that super slow mo.
The long distance banter from 2:00 to 2:22 is great
Two of my favorite YT channels collab over a topic I'm fascinated by. What a great friggin day.
A practical engineering and ave collab? What could be better
elyes grati add electroBOOM
More collab between the two would be better xD
If we got Applied Science in here, that's what.
AvE: Mechanical Engineering
Electroboom & Great Scott: Electrical Engineering
Practical Engineering: Civil Engineering
Cody'sLab: Chemical Engineering
We now need them all to get Ph.Ds or ensure they all have P.Engs so they can create their own Engineering Faculty for UA-cam University.
AvE and JoergSprave
TOP 5 Crossovers
I respectfully salute this partnership with Ave for this video. Well done to you sir!
Good AvE plug. I love his channel, and now will watch yours
skookum as frig.
A real skookum choocher that one
this is certainly a treat especial.
Keep your **** in a vise!
Keep your clan in a clamp
"I have an engineering demonstration somthing channel, and he has a clapped-out Bridgeport"
Lololol🤣
Glad to see another channel give AvE some love, enjoy this channel as well.👍
That's awesome I've been watching AvE for a very long time and never new what it stood for!! And what a great explanation!
The big issue with cavitation is the shape the water makes as it condenses back to water. The bubble on a surface collapses which forms a needle end which is what destroys the surface of impellers and whatever else you have.
Here's a link to a video of the collapsing bubble forming a small, sharp acceleration of the water.
Edit2: I never added the video... Weird. Here it is: ua-cam.com/video/ZaB5B3pec-A/v-deo.html
Funnily, I came to this video AFTER watching that video you linked.
Haha! Cutting AvE off before he could get to his dirty jokes! Classic.
Thank you for getting me I to AvE with your project. Before I knew either channel well, it was AvE on his bridgeport talking about terrible engineers that was one of the first few shows that I saw, leading me to you eventually.
AvE is sooo awesome. Love that guy. we need more of him.
OHHH THAT'S WHAT HIS NAME STANDS FOR!
The AvE linked videos don't lead to anything anymore. I would be very curious to see what went wrong.
Yeah very annoying, I have looked for them but don't know the title.
I realise that this is an old comment, but AvE went through his channel a couple of years ago and removed a whole load of vidjeos, this project would have been among those unfortunately.
This is hilarious. I recently subscribed to this channel and remember watching AvE going through this 2 years ago (long time AvE fan). I have gone full circle.
Lol, I think the video in question was actually the first AvE viedo I watched and made me a regular watcher. Love the ironey.
Interesting to see Blue Apron still sponsoring channels.
Chose a good one to sponsor though
"We've never seen his face but we're pretty sure he's handsome." Nomination for the 2018 best line awards.
Holy excrement! I have been subscribed to AvE for years and now you are the guy to tell me what it stands for?!
Ironically, I'm already a subscriber to Ave, and I clicked on this video because it said it was a collaboration with him... Never heard of one of those before!
You have forever been contaminated by AvE. His shmoo is impossible to remove.
The only option left to you is to rename your channel. Henceforth it shall be called _Practical Enginerding._
Can't escape even at full chooch. Yer dun fuckered.
He's like molybdenum disulfide on the livingroom carpet.
release the SHMOOOO!!
Indeed, this is something that can never be rectumfried.
I second the motion
So thats what he was milling that thing for all that time ago
AvE is my favorite channel and PE is top 10 for sure.
thumbs up for reaching out to AvE!
You had me a fluid cavitation. ❤🤣
I had me a fluid cavitation once too.
Made a hell of a mess.
Some people like it laminar, others like it cavitating 😘
It's like seeing the preacher roll up to the church on a Harley. o.O
Jim's videos i know a guy who is the pale of a biker Church
He's also a tattoo artist and a bail bondsman.
And also one of the genuinely nicest dudes ive ever met.
I usually have no idea that I’m interested in a subject until you bring it up. Thanks for the videos!
Fascinating! AvE's been my favorite Shmoo-tuber since I discovered him a couple've years ago: I never miss a vid. I had no idea that the name stood for "Arduino vs Evil". The mind boggles.
Also, cavitation.... yes yes, very interesting: you've earned yourself a subscription :D nice one!
I feel like Watts is a terrible name for a company that makes gauges for pressure.
Name a more iconic duo. I'll wait.
Cody's Lab x How To Make Everything :p
UA-cam duo? This Old Tony did a great pasta machine for Alex French Guy Cooking.
Clickspring and This Old Tony.
Fair enough, I'm literally subbed to all the channels you guys mentioned already
I bet most of us are haha.
Congratulations !!! Very well done and explained !!!
I never heart about this property of fluids in my 60 years life but it´s never late to learn.
Thanks a lot !!!
Have a good life !!!
its cool to see two of my longtime favourite channels to connect like this. Sorta validates this middle ground universe I call home
Oddly I am wearing my AvE shirt and tomorrow is my dads birthday where I gift him an AvE shirt. His second AvE shirt actually. Also I remember when AvE made this but I never realized it was for you.
x9x9x9x9x9 I am wearing an aVe shirt too
Popular Enginerding!
Nicely done video!! I like the way you present the information so even those of us who aren't engineers (yet) can figure it out!!
I love these channels. You and a few others help fill in the gaps the school system left in my understanding of practical science
I was wondering when that thing would come back.
Jeeez, we were waitin for this vidjeo since 1999!
Well said by a true AvE fan. :)
Thanks! I've been around cavitation and venturis with exhaust primers and pumps but never realized that steam was the culprit. I didn't know where the vapor came from so thanks for clearing it up. Just pile a pressure cooker principle only lots more potent. Thanks again!
Brady, I'm trying to find out how/where the cavitation occurs on a ultrasonic cleaning tub - like the one you showed. I know there is cavitation near the transducer and I have a feeling it doesn't happen in the water while the wave travels. My intuition is the cavitation happens only near the surface of the thing being cleaned. The contour conditions demand water near solid surfaces to be stopped so I think it happens the waves get near the body's surface. I think, I have an intuition but what I really would like to know is what really happens!!!
Dude, you are an aweseom teacher and a great engineer!!! Thanks for the content!
AvE videos are gone. Any backup of his videos? Be awesome to see those :)
Let me know if you find them pls
haha! now I have understood why when I bend the garden water pipe I can hear a strong noise of bubbles! Just some Bernoulli's shit going on there
UNZO Oh yeah! I'd forgotten about that question. Nice.
“Just for reference… and because it looks cool” 😆😆I love this type of engineer
I'm now learning about cavitation in university, fluid's MEC are amazing, AND this channel too. Greets from Chile!
An even cooler example of cavitation in nature would be the pistol shrimp! Mantis shrimp do use cavitation, but they also just punch their prey very hard.
Pistol shrimp have a single large claw with natural springs built into the chitin. They ratchet the claw open, and can then slam it shut with such force that it creates a cavitation bubble. When the bubble collapses, the resulting shockwave can stun, or even kill prey outright. Moreover, they can use the sound to communicate!
Pistol shrimp get their name from that loud, gunshot like noise. They can be clearly heard in an aquarium from across the room. They're the loudest animal in the world, creating sound over 200dB. When colonies of thousands gather on a reef, the cacophony can disrupt sonar. Other animals around the reef use it to navigate at night, because they can always hear what direction the reef is.
Mantis shrimp accidentally create cavitation. Pistol shrimp do it on purpose.
Now that is an interesting, informative and useful comment. Top work mate.
Any idea of the relative sizes of cavitation bubble that the two species create?
I presume the Pistol Shrimp's bubble would be a fair bit bigger, simply due to more efficient natural design?
My understanding is that they are very difficult to keep in aquariums because they're liable to break the glass of the aquarium.
What an interesting pairing. Grady is so wholesome and AvE is so... well...
I have a tough time comprehending some topics, however you make it attainable
Thanks for your videos! I really enjoy them. Please keep them coming!
Does anyone know what happened to the related AvE videos?
The water phase diagram didn't correctly indicate that liquid water is more dense than ice by the slope of the line between the solid and liquid be phases. (Note: I'm a chemist).
Also, I have personally used sonicating baths which function via cavitation to remove air bubbles from solutions as well as used ultrasound the lyse open bacterial cell walls as a step in protein purification. It's interesting to see how people outside my field use the same physical processes.
Grady i've been watching some of your older videos and I must say your one shot liners are pretty good. AVE having a callped out bridgeport milling machine or the joke about coming home with a lincoln welder when your wife is a miller type of guy. Right on!
Love how it shows the difference between an engineer and a machinist, 2:14
SUOMI MAINITTU, tai lähinnä vilahti ruudulla
torilla tavataan!
Your drawings were fine. The only dimension thats unclear is the minor diameter of the tapered hole but if it was drawn to scale, theres enough info there. I think Ave went about it the wrong way.
Use one of the simpler parametric CADs to sketch the part, and don't stop until it's saying "zero degrees of freedom left". Impossible to go wrong with that... ;)
*aboot
It's 1:34 AM and here I am after reading The Emerald Mile, in which the cavitation in the spillway tunnels at Glenn Canyon Dam caused a lot of damage. I'm not much of an engineer but dams and the forces involved with them have captured my interest
AvE's response is exactly how every machinist and mechanic talks when the engineers aren't around, haha!
“There’s three ways to do this: the dirty way, the hard way-”
*What’s the third way??*
I would assume the right way LOL
Woooo AvE
Used commonly in the Fire Service AKA Jet Siphon, Blow over Valve. Creates the Venturi effect to transfer water from one portable water tank to another water tank in a large firefighting operation.
YES ! I finally figured out who he made that for lol. AvE is the man!! Glad to see
I always thought it was Age vs Experience.
A nice vid at 4 am :D
West coast represent.
Awesome vid. We use a down hole pump in the oil fields that work off of the Venturi effect. we use large p.d pumps to move produced fluids in to a throat and nozzle to reduce down hole pressure and lift struggling oil and gas wells. Pretty awesome to see cavitation in action I only see the aftermath at work.
I work in water treatment. We use venturies all the time to measure flow. Nice explanation and demonstration of cavitation.
Hello, it's brilliantly explained. Thank you very much. You do a pretty good job. bye bye Toni . PS: Sorry for my bad English, but I'm from Bavaria ( south Germany )
Toni Turnwald ur English was spot on
Ich hasse dieses Gefühl sich für schlechtes englisch Entschuldigen zu müssen.
Grüße aus Norddeutschland :D
dontlikemath -.- Danke, da gebe ich Dir recht , meistens entschuldige ich mich auch nicht,nur hin und wieder, wenn ich mir mit dem Schreiben All zu unsicher bin, bzw. wenn ich vim Handy aus schreibe. Jedoch muss ich leider auch sagen, dass ich schon öfters mal angepflaumt wurde, weil einigen Deppen mein English ned passte. In diesem Sinne, Dir noch nen schönen Nachmittag. Lg. Toni
george green Thank you, but sometimes, when I write on my mobile, I'm to afraid of my spelling or my creations of a few sentences. Cheerio Toni
thank you very much. Right now I live directly in the Alps near the border to Austria ( Tyrol ), It's called Sudelfeld ( Hummelei ), this is a small village. It's pretty nice there. I wish you a good time and a lovely day. cheerio Toni
Very cool and interesting but.... Did you consider that (some of) the bubbles you are generating is just air degassing out of the water? I presume you are using mains water at about 5 bar (70 PSI) and 15 C (60 Frankenstein). It potentially contains about 0.09 Vair/Vwater. This dissolved air will "degas" out of the water well before you get to the cavitation point of water. I believe you have some air in your water based on the bubbles we see in a couple of shots just before you start the flow. Also, the bubbles survive a long distance up the venturi from the restriction. Longer than my intuition would think a cavitation bubble could survive. All in all an excellent bumble f**kery.
YES! i was waiting to see what became of this!
this how ave does it. brick by brick. golden channel.