What Happens When You Spin Ferrofluid Super Fast? 

It looks like two black hole colliding together

It would be cool to see ferrofluid in a rotating magnetic field from a 3 phase magnet. Maybe we could visualize the field rotating if the frequency was low enough.

A though just came to me, especially after the AC magnet at the end. With such high speed flipping of the magnetic field, the magnetic particles in the ferrofluid must also be flipping to align to the magnetic field. Does this result in an increase in temperature due to friction with the carrier fluid?

Absolutely fascinating! Thank you for sharing. Yes that ferrofluid has to be the messiest stuff on the planet - it's like used engine oil full of metal contaminants, will stain just about anything!

This is so cool!!! You make science and physics sound so cool!!!

Your videos are always so interesting. Your physics demonstrations genuinely blow me away with something I didn't know the existence of!

Never took as much of an interest in science and physics until I started watching this channel. I'd fly to wherever state he is to take his classes if he was a school teacher

this was really neat to see so many different demonstrations with magnets and the fields they produce.

Thanks for all these fascinating experiments!

The problem with ferrofluid is it is not showing the density of magnetic field very well. Also ferrofluid I think is not attracted to a magnet as strong as other magnets. (Centrifugal force can detach ferrofluid from a magnet easily so my guess is that is not a very strong attraction force). Could magnetic or iron dust look different in similar experiments (inside rotating magnetic field)? Thank you for sharing!

Here's a explanation of why the ferrofluid on the spinning magnet plate stops going crazy at high speed and act as if the entire magnet is static but weaker. The entire setup becomes stable because the time scale for "ferrofluid goes from flat to spikey" is significantly longer than the time scale for the magnetic field's period, and the tiny perturbation from each half period becomes insignificant compared to the average. Remember that the force the ferrofluid experience stays the same whether the magnetic field is pointing out of it or into it, and also that for this experiment, that's the only thing that affects the behavior of the ferrofluid. You can verify this by increasing the viscosity of the ferrofluid and watch as the pseudo-stable state form at lower speeds. It's a bit like how you stop getting stuck running your nail over a comb when you do it fast enough, but will when you do it slow. The time scale of the force you push your fingers against the comb pushing your finger deep enough to get stuck is much longer than the time it takes for your nail to go over one tooth and reach the next, so you stop getting stuck as your finger doesn't have time to...get stuck. For the drill, the explanation is similar: it's to do with the time scale of things, but here the exact events are different. In this ferrofluid, the spikes doesn't have time to gain much speed before the magnetic field leave and came back from the other side, pulling it the other way. Still, because the ferrofluid is moving in the same direction as the magnets, it spends a little more time getting pulled in the direction the drill is spinning than the opposite direction, so in theory the speed will still build up a little with each period if the experiment was done in a vacuum and it doesn't fly apart. However there's water, so drag stops it from going at any real speeds. You can verify this by having some kind of marker (a drop of colored ink should do) in the ferrofluid, and you'll see it slowly rotates even when it seems stable, and if you graph the ferrofluid's rotation speed against the drills rotation speed, it'll asymptotically approach a limit towards infinity drill rotation speed.

I asked for him to put it inside an induction motor once. I'm so excited that he did something along those lines! Very cool!

Props to you for your dedication towards science, specially physics. Most people feel averse to physics, but they don't understand that it explains everything around us. How the world works essentially. These videos can have very positive and wonderful effects on young minds, may be even push them to pursue science as they get older. I only have one minor suggestion. Videos will have a greater impact if they explained everyday phenomena. You can also notice this from your views. The ruler trick and the putt putt boat videos got over a million views, because we have all seen these, but never asked ourselves why/how they work.

Use a tone generator and different frequencies with a electro magnet to see the effect of different wavefoms. Should be a easy setup coil, audio amplifier, and a tone generator phone app.

excellent demonstration of magnetic fields......thank you for your time and effort

There are no “lines” in a magnetic field. There is just the field. “Lines” appearing in the ferrofluid are simply created by the aggregate alignment of the ferro-particles in the fluid. This can be proven by doing the metal filing experiment a number of times. The “lines” will be in different places with each test. The “lines” in the filings experiment eventuate because each metal filing is literally turned into a mini-magnet and they are just lining up (meshing) end to end because of the poles aligning with the general field, which is actually a 3D dual toroidal shape, where one torus form the North Pole field and the other forms the south field. In between them is the accretion disk, which also appears in the filings experiment. Check out Ken Wheeler (Theoria Apophasis on RU-vid) for deeper magnetism explanations.

I love this RU-vid account, it is always so interesting and I learn something in a fun new way

The ferrofluid catching itself is so cool.

More of this please! Very very cool!

Oh, I thought you'd get a warp bubble or some anti-gravity... but this is also cool.

Would've loved to see what happens with different wave forms in the electromagnet. Sine wave, triangle, square, saw etc.

such good videos . Love your channel

this man never ceases to amaze me

Oh, how much fun that must have been! You should definitely try this with a polyphase arrangement of coils and a variable frequency! Just like an induction motor, but with the ferrofluid as the rotor. ;)

Always fascinating to see what you come up with next. I'm wondering if there's any way of using (some form of) Ferro-fluid to create a very powerful electromagnet... Does what you're doing work in inverse? If you pumped ferro-fluid round & round through a conductor fast enough (eg: a tubular copper ring/or plastic tubing surrounded by a copper wire coil), would it generate a perceptable magnetic field? What if you made of ferro-fluid with liquid Oxygen as the liquid component (or some other extremely cold liquid), would this significantly amplify the effect?

It looks like some kind of Venom Symbiote

In case you're wondering, the Tape on the drill is to cover up the LED light that sits just above the trigger.

Please try sealing liquid ferrofluid in a clear plastic tube arranged in a circle. Then try applying different magnetic fields in an attempt to spin the liquid within the tube.

Awesome video! So many future applications could come from Ferrofluids. Would be awesome to see it in vacuum so it doesn't have the drag of the brine solution.

Ferrofluid (self made) on top of a magnetic stirrer. This is what I did as well, back at school. Took it to a science fair, it won me 50€. Several years later, I now have a PhD in chemistry and work for one of the most advanced companies on the globe. Pick your trajectory early and watch where it takes you.

Please try making a speaker from ferrofluid by replacing normal ac current though the coil by audio amplified audio signals.

Given the ferrofluid is made with metal nanoparticles, could you use the rotating magnet setup with the ferrofluid as a polishing device? Given metal is fairly abrasive, I feel like it would be a pretty efficient, well lubricated polishing setup for lower hardness, non-magnetic metals.

So freakin cool man. Love this channel

Awesome bro Keep up the good work

Awesome, maybe this coul be a way to visualize the rotating magnetic field in a three phase induction motor. Probably it would be more interesting at slower frequency than 50/60 Hz

Measure the change in impedance of your ac coil and target the frequency for a tank circuit.

4:14 that is the most electroboom setup if I've ever seen one. All your missing is for the coil to set on fire or you shocking yourself. Really cool video man!

there are a lot of videos on ferrofluid but all of them just shows what happens when a giant magnet is brought near it (VERY boring) . I was looking of this sort of videos, brings a nice change!

The magnets in the drill is like watching one of those taffy folding machines ...

I barely understood, need more, this is cool.

You could easily rotate it with coils placed around and there is a vessel in the middle of them to keep the fluid in a circular form. Like mercury or with a inside ring that one polarity and an outer ring has the nother polarity and like rail guns the magnetic field is genersted by the fluid to move

Next experiment should include AC current a various frequencies. Perhaps even to sources at different locations so they can oscillate in and out of phase.

Very cool video, dont know how any of this works, but always appreciate an experiment

This reminds me of Hans Jenny's cymatic soundscapes. Inspiring and fascinating.

Beautiful. Perfect for a sci-fi movie special effect...

Eddy currents should form whether you're using A.C or rotating permanent magnets.

Every time this man is with a good idea

Would be interesting to do a ac frequency sweep. Wonder what it would do at it's resonant frequency.

You should make note the fluid forms hexagon shapes towards the end. That seems to be a shape that happens all the time on a cosmic scale.

Respect 🤝 thank you for all of your wisdom that you have spread quantum physically 🖖

I would have liked to see introducing something such as a table tennis ball or similar to demonstrate that the fluid wasn't moving

I kinda want to see it if you play music through the magnet coil. How cool would the different tones look?

This is so amazing. You have to do a collab with the Slow Mo Guys!!!

Way cool loved it and love your crime scene LOL

I wonder if by using an electromagnet and pulsing it at different frequencies under the ferrofluid if it would produce cymatic type effects or patterns.

Would be interesting to see different frequency AC.

You can make ferrofluid dance by syncing up the electromagnet with music.

Hotplate in a vacuum chamber with gallium or tin in a pot if you submerge wood in it would it absorb the metal in vacuum. Wood burns at 300 Celsius. Tin melts at 231 Celsius. It should be possible

2:23 Well now I want to see him boil water on a coin lol

You could use a stereo on that coil and play music through it to see the sound waves

Can you explain again why those spikes are forming? And, will the ferrofluid heat up due to Eddy currents?

Super cool experiment. Interesting how the magnetic field is easily seen by doing this. It also reminded that video game World of Goo.

That big magnet wheel spins around like John Cena's WWE Championship belt. XD

You know those little desktop fountains and the like you can buy. I want one those rotating magnetic fields with ferro fluid in if version of one of those...

You should try the spinning thing again to see if you can sync your shutter speed up with the rotational speed of the magnet plate .. thing.. you made. I’m curious if you can match it to make the fluid look like it’s totally static

I was more concentrated on the background sound It was the same that was playing in titanic

No one : Him: casually generates a black hole

Idk why i loved to watch your videos even tho i don't understand your explanations Its too good for me my brain can't process it

Waaw this is what I've been waiting for🤩

5:02 i like to imagine that he is just saying this to cover that he did an actual crime

I love your videos! Looks like you're here in Oregon too? I see your Mt Hood shirt, I've been working at a ski area in the southern part of the state for nearly a decade. If you ever get down this way give me a heads up!

You can turn the led on the drill off by pushing it in btw action lab

I really like this dude 🤘

At 2:45 it would be cool to put something like a ping pong ball in the fluid to see if at different rotation speeds the ball moves or doesn't.

That answers my question from last time about whether the ferrofluid was water-based: No (it looks oil-based, but I don't know whether it is hydrocarbon oil or silicone oil).

Now thats space right there

I saw one video I think it was modeling of Ferrofluid and they found that you only need to know what is happening on the surface of the fluid for the model and you don't have to worry about the internal volume. The fact the ferrofluid stopped spinning with the magnets is kind of proof of that simulation.

Does the fluid change density or buoyancy at all with a magnetic field applied?

Does ferrofluid increase in temperature with magnetic forces going through it ?

The is genius! Looking at all the different ways to spin Ferrofluid and see its behavior!

Came here hoping you'd be putting ferrofluid on an induction cooker. Was not disappointed.

They should use this to model how Venom moves in the new movie.

Definitely the coolest thing I've ever seen.

I didn't understand anything you said, but it was awesome, and very cool. I've been working with magnets for 15 years, and I am amazed at what can be dune with them. I have a 3D printer which allows me to explore new possibilities, more in a physical dynamic. But, what you are doing is cool, however the liquid nitrogen part does not seem like a viable application to energy, and propulsion. Thumbs up, like & subscribe.

I like your Mount Hood shirt!

ive had an idea for a WHILE NOW, of using a spinning ferofluid to create gyroscopic forces/stabilization for flying/underwater vehicles and or spacecraft. using a series of electromagnets and a smart circuit to control them you could make such a device with "zero moving parts" other than the ferrofluid itself that is.

Ferrofluid is such a sci-fi thing.

Like for the white particle making a cameo on his hair.

Are you in Oregon?! Is that shirt for Mt. Hood the mountain or Mt. Hood Community College? Given your content, it could be either

The magnetic lines are created by the mass channeling the field and lining itself up. You cannot find a magnetic line in a field, because the field is homogeneous. Mass creates the lines. Then, in order to illustrate a field, lines are used to visualize a gradient, but they are not actually there.

Now I got how they got footage for venom movie

i wonder what would happen if you replace the electromagnet by multiple speakers, adding sound to the magnetic field should be fun

I wonder if we could lavitate the ferro fluid like we levitate the magnets using spinning cylindrical magnets🤔, like, after enclosing the fluid in a spherical plastic bag or something

Where die you get the Ferrofluid from? Isnt it very expensive?

The ACTUAL ODDS of us both being both named the same and meeting at a imagine dragon concert. It was fantastic meeting you! Thank you so much for taking a picture with me.

Put an audio signal on an electromagnet. Make the ferrofluid dance.

Ferro Fluid is some cool stuff 😎

I didn't at first understand with the disk that the fluid wasn't flowing until you put your finger in. The Spikes don't stay the same which would mean the fluid would be directionaly flowing, but the spikes are forming and then falling down again once the magnet passed. More like a Piston in an Engine than a Wave.

This is art.

4:31 is that sound coming from the device or the ferro fluid? i thought that might be some cool way of trying to make a speaker/subwoofer.....