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There is a simple way to levitate magnets – and physicists are beginning to understand how it works. The technique could have applications in robotics in the future. In 2021, Hamdi Ucar <https://archive.ph/o/YlYcK/https://www.researchgate.net/profile/Hamdi-Ucar> – then at Göksal Aeronautics in Turkey – posted a YouTube video showing two magnetic spheres levitating on either side of a rapidly spinning bar magnet that was positioned with its north-south poles vertically. Ucar also published a paper on the phenomenon, which attracted the attention of Rasmus Bjørk <https://archive.ph/o/YlYcK/https://orbit.dtu.dk/en/persons/rasmus-bj%C3%B8rk> at the Technical University of Denmark. With a colleague, Bjørk decided to replicate Ucar’s levitation technique. “We sat down for … half an hour and tried. I was like, it’s completely out of the question, it simply shouldn’t work. And then it just worked. We were completely baffled by this,” he says. Read more Extremely cold drop of helium can be levitated forever <https://archive.ph/o/YlYcK/https://www.newscientist.com/article/2377034-extremely-cold-drop-of-helium-can-be-levitated-forever/> Now Bjørk and several other colleagues, all at the Technical University of Denmark, think they understand what’s going on. They started with Ucar’s set up where a “floater” magnet levitates <https://archive.ph/o/YlYcK/https://www.newscientist.com/article/2251277-magnetic-levitation-can-be-used-to-separate-the-living-from-the-dead/> when placed on top of another magnet that is spinning hundreds of times every second. Then they tested a range of spinning frequencies and floater sizes while filming the magnets and measuring their magnetic fields. The researchers also developed a computer simulation of the experiment. Frederik Durhuus <https://archive.ph/o/YlYcK/https://orbit.dtu.dk/en/persons/frederik-laust-durhuus> who worked on the project says it is the rotation that is key to the process. He says many people are familiar with the way two magnets repel each other when held with both north poles (or both south poles) close together. But usually, one of the magnets will then simply flip over, meaning that a north and south pole are close together – at which point the two magnets stick to each other. Durhuus says rotation counters that magnetic “flipping” and keeps the floater levitating. He compares it to the way a spinning top <https://archive.ph/o/YlYcK/https://www.newscientist.com/article/2351110-spectacular-liquid-fractal-generated-by-a-submerged-spinning-top/> counters the downward pull of gravity and spins for longer than we might expect. Ucar’s experiments show that the effect can persist even when the rotating magnet is oriented horizontally <https://archive.ph/o/YlYcK/https://www.youtube.com/watch?v=6TGn1IjbjP8&ab_channel=Sudanamaru(H.Ucar)>, rather than vertically like a spinning top. He disagrees with some details of the team’s numerical and theoretical models, but he says that their independent validation of this surprising effect is important. “I don’t think we will be able to make any [magnetically levitating] trains with this anytime soon, but it will be interesting to see where it can be useful because it does not require very fancy equipment,” says Joachim Hermansen <https://archive.ph/o/YlYcK/https://orbit.dtu.dk/en/persons/joachim-marco-hermansen> who was also part of the team. Marcel Shuck <https://archive.ph/o/YlYcK/https://notouchrobotics.com/%23team> at No-Touch Robotics in Switzerland says that magnets are already used for suspension and transport of objects in some industries. He says that using the rotation scheme could be a simpler alternative to systems that require constant readjustment of magnets. Journal reference *Physical Review Applied* DOI: 10.1103/PhysRevApplied.20.044036 <https://archive.ph/o/YlYcK/https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.20.044036> On Sat, Oct 21, 2023 at 11:21 AM Hamdi Ucar <jxu...@gmail.com> wrote: > Yeah, I knew such a thing will be published but not good as this. My name > and a link is shown in first sentences so everybody can check it without > pay-wall. Still dont know what is written at the remaining. > This event makes my article access stats as hockey stick. Fantastic! It > it also shown at > https://news4republicans.com/science/mysterious-rotation-trick-makes-magnets-float-in-the-air/ > so it is matter of time that Elon to become aware of it :) > > I am no longer subscribed to Vortex-l. I dont know...but nobody there > interested on that and did not considered that this mechanism might be > present in nuclei. If so we can learn too much about the strong nuclear > force and play with nucleons like chemistry. > > This event comes as honeymoon! > > Hamdi > > > On Sat, Oct 21, 2023, 18:00 Terry Blanton <hohlr...@gmail.com> wrote: > >> https://youtu.be/BikS8BbSvlM >> >> Terry >> >
