Could you get the fully ring by doing this where water and oil meet?

N3rdSci3nc3 If you had a piston come out from the side of the pool and a layer of oil, say vegetable oil, thick enough to incorporate half the vortex ring, then you could test it. However, I suspect that the differing properties of the water and the oil will lead to instability of the vortex. The difference in physical properties; like the viscosity, density and compressibility, and even the chemical properties; like the molecular polarity, will lead to one half of the vortex ring lagging behind the other half. Friction between the two separating halves will lead to a loss of angular momentum as the water half of the vortex acts on the oil not in the oil's half of the vortex and oil's half of the vortex acts on the water not in the water's half of the vortex. Though it wouldn't hurt to perform the experiment and see for ourselves. Might have to reduce the size of the experiment a little, or find some where where oil and water are already being stored together where an apparatus can be submerged that would generate the vortex. Any ideas where such an experiment could be performed?

So cool. I'd try it, but I live in the UK where we don't have outdoor pools. Or sun.

It is hard to concentrate on the physics when the nature's beautiful creation is in front of you. That is why perhaps we do not often find beautiful professors :D

It would be interesting to take a massive plate and do that in an olympic size pool to see how big the shadows would be!

You always create physics, your movement, your speed. Its all science.

Some years later, you sure did.

i think you did. 😊🤘🏻

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@@dinastiashalom4440 eso qué?

Yes many things to ponder

Am I only who was expecting a line below "I tried this and it works" instead I have a pool?

😬

A bathtub, maybe...?!

I've seen it in a tub

Wish they'd shown me videos like this when I did my GCSEs!

Followed you here Sancarn. Thanks! I really love this kind of thing. I'll see what else she has on her channel and most likely will subscribe. All the best to you. :)

This stuff is cool, but theory is the coolest.

electrocat1 Stop saying cool so much

cabaretampere sorry are we cool?

+Sancarn Dindn't the word Theoretical give you a hint? :P

Yes I wonder if it’s how wormholes in space work!!

Same!! 7 years later though 😆

@@eduardodemedeiroscarlos5175 I think it goes much deeper than fluids. I suspect something analogous to this underlies entanglement and other quantum weirdness.

Verbed is also an example.

Nouned browned Aired googled youtubed tabbed PCed (personal computered ) Mobiled phoned lol there are a lot of them

@@catgirlQueer Verb is the word.... XD

@@catgirlQueer Happy exampling

Verbified

Hahahhaha praise be

Peter Young haha 😁

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Peter Young ramen

e8iMm7KE999 hey tard, science isn't a democracy. It doesn't care what you think or believe, it will remain true.

+Someone Special She's already doing this

I think she will teach physics only to +Someone Special

+Someone Special Wish I'd had her teach my physics course in HS or at Purdue years ago, instead of the dour kraut I had there! I'd have enjoyed it MUCH more & paid better attention to it back then!

Someone Special I want her to teach me biology practical.

+Steve Kramer :what is dour kraut?

Thank you!

you're so cool and dreamy @-@

Phenomenal Explanation ))

Ikr she has 7 million now

8 million

@@ShiratoriIsOffline more than 10 million

@@fcktheworldeconomicforum6804 oh god, It's like seeing a relic of the past

4 billion**

Jacob really....

Ok, this sounds good to me except for one thing. How much space time does a wormhole created like this cover. Physics Girl made a tunnel through the fabric of water and it wasn't a very long tunnel. The amount of energy required to create a wormhole that bends space time is astronomical, perhaps as much energy as exists in the entire universe.

Looked like the tunnel was longer than the distance between point and point b

Except that the fourth dimension is time and you can't have time as a dimension in your "4d plate". Also, we need two media (one being the fabric of space-time) for this kind of an arrangement, and last I checked our universe has only one. But the Idea is still open to future discoveries.

but i don't think you will be able to find negative energy in your garage.

It's not food dye it's food coloring silly

@@bonardemyma9523 it's just the same bruh

If you see one of these coming your way, DON'T PEE IN THE POOL!

@@BozHogan lmao

XD

So true i do that.

aca

acapellascience yum I love miso soup and I do the same too

wait but how do you fit a plate in the bowl

Me to s4r1n

I Love Whirpools So much

Also My Mom Is Just Mad T Me So I Can't Make Whirpools

@@bonardemyma9523 r/youngpeopleyoutube

Lol I see what you did there! XD

I don't get it

Why

I get it now! XD

Lol

That's awesome! Don't get discouraged if every class is not as interesting as this demonstration. If you can get through the boring classes there are countless phenomena like this one that can be understood and if nothing else, appreciated.

Jacob Beckey Great advice. At times, it's a struggle to understand the math and the concepts behind physics, but once you do you can explain phenomena like this. That's what's great about trying to understand the world.

Physics Girl To be honest I am under the impression that there should be more of this kind of "explaining phenomena" in education. People should start with something like this and say "Why?" Then we learn the reasons why. Then we start to relate it to other things like tornadoes and smoke rings. I had no idea that smoke rings form because of this, nor that mushroom clouds form from the same phenomena. And I've got a degree in Theoretical Physics... xD I think education really needs to be revolutionised. But it's getting there I guess.

Sancarn Totally agree! If schools approached education like this, we'd learn a lot more as kids.

Thank you! I like the summary haha..

BinkieMcFartnuggets oh damn

Stop right there

McGuiness 👋🏼

BinkieMcFartnuggets, Harvard: bro we got some dorms here if you wanna stop by

Illuminati: we are tracking you down.

Thank you. :) I was pretty shocked at how well that worked. I thought it might swirl around for a while on the surface or even get left behind, but it traveled down through the whole ring and stayed like that for a while.

> oval or a square? kiysiy or a trefoil knot. Search on vortex knots

kiysiy preservation of angular momentum, mostly. If you push water with a plate, it flows past the edge in a way that makes it rotate. You put angular momentum into the system (to do so, you must do work - not work in the everydaylife sense but in the sense defined in physics, but in this case the two concepts allign nicely) and that is one of the quantities which is always preserved in a free system (i.e. a system no work is performed on). The conservation of angular momentum explains why it is so stable. And the shape comes to be because we are talking about rotations here. Square vortices generally don't form. Elliptical ones could form, I guess. And under special circumstances (seem for instance, some of the vortices on Jupiter) they may be hexagonal.

Kram1032 Well, net angular momentum of the system is zero, and the dinnerplate isn't being torqued. It's like spinning up many pairs of flywheels, each CCW has a CW to cancel. But the net linear momentum isn't zero, so if you were floating in the pool, the Falaco half-ring gets momentum x, and your body gets equal momentum x in opposite direction. This illustrates that "vortex shedding" is the origin of thrust of propellers, rowboats, fish, and aircraft.

wbeaty Is it net-zero? Obviously, if you only take the cross-section that is visible on the surface, the two disks rotate in opposite directions so their combined angular momentum is zero. However, if you look at the bottom of the vortex-half-ring, there you have a rotational direction which may not be cancelled out. - it depends on what the air flow above that does, I suppose. Though given that there is a medium change, I don't think the induced angular momentum completely cancels out. Since you do work on the system, I don't see why there definitely shouldn't be any. That being said, I can see the linear momentum being non-zero too. (Else, after all, it wouldn't move forward) and for a full ring at least, I can see how angular momentum overally would cancel out and only that momentum would remain. Now I'd love to see a version of this experiment where you can also see the air flow. I'd assume that an air-vortex would form just as well as a water vortex did in these experiments. However, I'd also guess that the air half of the vortex would move at a different speed (if it didn't, it would have two separate momenta for the different media which would be weird.) and it probably wouldn't be as stable?

That's a great suggestion. Will have to try it soon.

same

@@grieferoncamera4600 that was 4 years ago and now that i have advanced, school and college does teach you more than this lol, you'll see

@@somaannn If you spend enough time researching on your own then you'll learn more if you're really that dedicated

make you some Flow-tubes Put one color in the oil and a Different color in the Water and see but it might mix.

no the reason is oil is less denser water ,so you will not observe it,but if u take liquids of nearly same density and having considerable difference in their viscosities then you will see vortex line at an angle

Straight up made me spill my drink from laughter lol

+The Federal Farmer yup

Could they move independently, though ?

+Sunomis yup

yes you will get four if the plate would have two extra holes and the extreme holes will spin in the same direction and the middle ones would spin in other direction but the intresting part is the diameter of the vortex is independent of the diameter of the holes drilled on the plate it is completly a function of velocity with which the plate has been pushed

The Federal Farmer that propbly could happen

And maybe related to quantum entanglement also.

Maybe space and time are like two different medium, and we're just clinging to the skin between them (spacetime)

@@theAntiCauliflower maybe there would be just a “time” universe, or just a “space” universe!

@@bennybooboobear3940 Ooh that's an interesting idea! I can't even wrap my mind around a universe without both of those things existing, and whether its possible life could exist in either one of those universes..

Thank you! I didn't realize how many times I said "so cool" but judging by the number of comments, it appears to be a lot! :)

Physics Girl It was :) But it represents the awesomeness of science just so well... maybe it could be your catchphrase!

Haha that's a good question. The pool smoothes out enough after a minute or two. The wind is the real issue. The very first one I made was really good, but of course I wasn't filming. Then it was just a matter of getting the speed and direction of the "sweep" just right. :)

wow thanks for the explanation and the great effort making us this video! :)

They Decenegrated Whey The Pole Cuts It Half

But unfortunately, it wasn't sunny for us, so we had to put food coloring in to see the vortexes. :)

Um...Maybe You Right Rina

Nice Picture Rica Also

Did it work for you? Yes, if there were any small ripples in the pool, it broke up the vortex quickly.

Physics Girl It worked really well. I think the longest it lasted was about 1 minute. There were lulls in the wind, followed by gusts. Being a sunny day there were thermals lifting off every now and again.

Physics Girl I just went out and tried it again today. Less wind. Vortex had no trouble going the length of the pool first try, however with the size of my pool that's only about 1 minute before it hit the far wall. Any underwater obstructions (stairs, my Girl's leg etc) disrupted it.

gasdive Awesome. :)

@@physicsgirl The whole thing reminds me of quantum entanglement. You created two "particles" out of a disturbance in the force ...egh field and those two were connected (coupled dynamics) and you actually showed the connection. Very nice. How about a video with similarities between fluid physics, matrix behavior of water droplets bouncing in the surface and quantum phenomena?

Such a chauvinistic comment. I am sure she appreciates it.

I smell a Poe. Oh god I hope I smell a Poe...

***** It's a fucking trilby, get it right.

PrestigeWorldwide Butt it´s a felt baseballcap worn backwards.

LowFlyinGirl +1... - I'd go so far as to say "rare to see such a well educated youtube host" - gender has nothing to do with it. This show is incredible for a lot of factors. Host, content, delivery.

What? Getting funding is selling out?

Caleb Jones Calm down. It was a joke.

All Countries You Can Do Everybody Has A Pool Exept for me :(

England Is A Geography of The United Kingdom

You can do it in a bathtub with a smaller plate.

+Akili Visual That actually seems plausible. The two largest hindrences besides the theorem would be the energy source to create such a vortex, and the ability of your cargo to survive such a journey.

Agreed

Beat me to it. This exactly.

Thank you! Honestly, I don't know much about fluid dynamics either. I think it's one of the most difficult branches of physics, and most undergraduates are not required to take any fluid dynamics classes. (I wish i had taken one in undergrad!) That's a very interesting question though. I would assume the vortexes would move at different speeds because the viscosity for the two fluid is different.

Physics Girl Yeah I was talking to my friend one time about how fluid dynamics, a seemingly important branch of physics, just doesn't seem to be required in undergrad or graduate school for physics. Engineers are the ones who take it. I'm still in undergrad (physics) perhaps I should consider it.

This would be a neat experiment. I'm not fluid dynamics expert at all, but I can imagine that if the two fluids are at rest and that you're simply moving the ring as you've described, there would be a difference in the vortex speed, but the resulting difference may skew the ring out into a line, and possibly rotate it completely and repeat. I'm thinking of a ring forming into a line, then forming into a ring again, etc. and that's because there is no net external torque, so angular momentum is conserved, thus if the system rotates partially, it must rotate completely to conserve momentum. I think the reason we have a half ring in the video is because of the extreme case, where the bound viscosity difference is so much, that there is no angular velocity for the ring system itself, but given a critical viscosity ratio between the two liquids, there may be a case which the ring forms and reforms. Not sure! Fascinating question though.

Why not be the first person to go into black hole and see if your theory was right.

See my comment! Didn't even see yours! :D

Icepalm Hearthgold Yeah! Travel 33 or more light years!!! 🙍

I mean why not? They are said to be connected with other ones too, like a tunnel, right?

That's what I was thinking.

Это не мой папа!

I hate to break it to you, but this was a physics video. ;)

Physics Girl and it was waaaaay awesome xD

FRUHD I think what you are refering to.. is boring teachers who probably hate their job and aren't very good at connecting with the brains of their students.. they make science boring.. but then you look at Vsauce and shit.. and young people are very interested in science, but only if they have a reason to be interested.. otherwise it's boring. (A lot of science teachers aren't even scientist, they just read from books and stuff, and the ones who are scientist.. don't get paid as much as they should, and they get payed the same as the other teachers when they're the ones missing out on money to educate kids).

Dinky Grambus It might mean freeenergy alternative!

I wonder if you do it in a round pool and twist it just right if it can orbit the pool

I think thats more like saying the same for a planet that rotates, it rotates without slowing down just like these particles spin in the vortex, dont forget vortexes themselves dont exist, its merely particles of water acting that way, and as long as nothing is stopping them from doing it (friction/other forces), they will continue to do so

@@delluminatis Saying vortexes don't exist is like saying water doesn't exist because water is just a bunch of h20 molecules. A rather moot point.

Siiiimp

I know right?!?! she's smart and awesome

+Evvy SoccerSinger same

صباحالخيرالليكانمنالمقررعقدهمعبعضالأحيانتطل

durka durka to you too

meadow boyd 😂😂😂😂😂

A jealous person, that accomplishes nothing

The Anti-Vortex Lobby

@@reinforcedpenisstem Big Vortex

Sexist males Jealous females Random thots... Gays

@@ryzerred761 gays?

Thanks!

It's probably underrated bcoz it's science I'm subbing too

She is mine