강유체 추진: 새로운 우주선 추진 기술: 새로운 우주선 추진 기술

강유체는 자기장에 노출되면 스파이크를 형성하여 우주 추진에 사용될 수 있습니다.

### 페로유체: 우주 추진의 미래는?
* 🧲 페로플루이드는 오일에 부유하는 작은 철 함유 입자로 구성되어 자기장에 노출되면 **자기장 선과 정렬하기 위해 스파이크**를 형성합니다.
* 🚀 미시간 공대의 과학자들은 소형 장치의 연소 대안으로 **우주 추진을 위한 강유체 스파이크**의 사용을 연구하고 있습니다.
* ⚡ 물체를 고속으로 추진하는 한 가지 방법은 **정전기력을 이용해 하전된 물방울을 구멍을 통해 가속**하는 것입니다.
* 🛰 미시간 공대의 과학자들은 페로유체를 사용하여 **추진을 위한 바늘로 스스로 조립되는 디자인**을 개발했습니다.
* 🔬 이 디자인은 **자기장을 변경하여 추진 방향을 조작**할 수 있으며, **쉽게 축소**할 수 있는 잠재력을 가지고 있습니다.
* 🌌 "이 페로유체 추진 기술이 성공한다면 **우주 추진을 축소하는 혁신적인 방법**이 될 수 있습니다."
* 🛰 미래에는 **강유체 추진을 사용하는 초소형 위성**이 하늘을 가득 채울 수 있습니다.

this is ferrofluid. It's made of tiny particles of iron-containing compounds suspended in oil. The particles are so small that normal Brownian motion (the jiggling of atoms and molecules) keeps the particles suspended in the oil, never settling. When you expose ferrofluid to a magnetic field, it forms spikes like a porcupine. These spikes form in order to align with the magnetic field lines. It takes less energy to form these spikes than to lay flat. This is the same reason why when you put these steel coins on a magnet, they don't want to lay flat but they want to stand up straight. Now, these spikes on the ferrofluid used to be just a fun novelty, but scientists at Michigan Tech want to use these spikes for something a little more useful, like space propulsion. Normally, we use combustion to propel objects and satellites into space, but for smaller devices, it's very difficult to make tiny rockets that work well. So, we have to think of different ways to propel something forward. Combustion works well because it can

make extreme pressures that send hot gases out the nozzle in One Direction, while the spacecraft moves the opposite direction. The faster you can Propel the gas in the opposite direction, the more momentum you have to move your spacecraft. But combustion produces large forces, and it works well for getting an object moving fast enough to orbit Earth or leave Earth, but it doesn't work very well for tiny little adjustments. You need micro thrusters for that. One way to propel something at very high speeds is with the electrostatic force. For example, I can charge this needle with oil in it up to thousands of volts and then aim it at this aluminum foil that has the opposite charge. I put my oil in, turn on my charge. Watch What Happens. There it goes. Look at the fine spray. The reason this is happening is because on pointy edges on things that are charged to high voltages, there's an extremely large electric field right at the tip. This causes all of the oil that's at the tip to have the same charge and be repelled from the other

oil around it so it forms tiny micro droplets of oil that fly away from the tip of the needle at high speeds. So there's a slight force on the needle, pushing it in the opposite direction. So to make this design be useful for propulsion, you can design it where there are drops accelerated through a Charged hole and then shoot out the other end while the spacecraft moves the opposite direction. But this design still uses needles, which aren't very scalable when you want to make small little spacecrafts like this one. This is called a cubesat; it's a miniature satellite. Now over 4,000 of these tiny spacecrafts and others like this have been launched into space and are orbiting us right now. They're very small, and the designs are getting even smaller, so there needs to be a way to make these propulsion systems tiny with less parts. So scientists at Mission can Tech have come up with a design that uses ferrofluid that can self-assemble into needles that can then be used as the propulsion.

material. Let me show you. So, I just have a magnet taped under my table here to create the magnetic field. You can already see it assembling into these needle structures. So, we already know that ferrofluid can make spikes when a magnetic field is applied. Now, watch what happens when I put a charged plate above these spikes. They actually shoot off tiny micro droplets of ferrofluid. You can't see the droplets flying off, but you can see it saturate this paper towel right above where each spike is. It works the same as or better than a needle, and you can manipulate the direction just by changing the magnetic field. This is so cool. The closer I move the electrode to it, the more it becomes a continuous stream. Even if I charge my fingers, it shoots up to my fingers. Look at those needle projections coming off each of them. Thank you. Oh, that is so weird. [Music] It looks like it's alive with like hair growing out of it. Now, the ferrofluid they use is a little different than I'm using here. Theirs is

an ionic liquid, as opposed to just an oil suspension that I have here. But if they can get this to work, it could be one of the coolest space propulsion techniques out there that has the ability to scale down very easily. So in the future, our skies could be filled with tiny satellites using ferrofluid propulsion. And thanks for watching another episode of the action lab. I hope you enjoyed it. If you did, don't forget to subscribe to my channel if you haven't yet. And you can also hit the Bell so that you get notified when I release my latest videos. And thanks for watching. We'll see you next time. [Music]

Ferrofluid Could Be The Future of Space Propulsion

The Action Lab is a channel dedicated to performing exciting experiments and answering questions you never thought to ask! I'll put things in my hydraulic press, vacuum chamber and perform countless other experiments just to watch cool phenomenon. I experiment on the world and objects around me. You'll be so amazed that you'll forget you are even learning anything! Please enjoy as I continually answer the "what would happen if..." questions you have. Feel free to comment with any scientific questions you have about anything. I have made my career as a PhD in Chemical Engineer and now I want to share how awesome science and experimentation can be! 

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페로유체의 힘: 재미있는 참신함에서 우주 추진력까지

페로유체는 오일에 부유하는 작은 철 함유 입자로 만들어져 에너지 요구량이 낮아 자기장에 스파이크를 형성합니다.

미시간 공대의 과학자들은 이 스파이크를 소형 장치의 연소 대신 우주 추진에 사용하는 방법을 연구하고 있습니다.

정전기는 뾰족한 모서리에서 같은 전하의 반발력을 이용해 물체를 고속으로 추진하는 또 다른 잠재적 방법입니다.

소형 우주선 추진을 위한 페로유체 사용

강유체 추진은 하전된 구멍을 통해 기름 방울을 가속하여 우주선을 반대 방향으로 추진하는 방식으로 작동합니다.

이 설계는 큐브샛과 같은 소형 위성에 더 적은 부품으로 추진 시스템을 더 작게 만들 수 있는 솔루션을 제공합니다.

미션 테크 과학자들은 추진을 위해 바늘 모양으로 자체 조립할 수 있는 유체 기반 설계를 개발하여 소형 우주선 추진 시스템의 필요성을 해결했습니다.

자기장 아래에서 강유체의 놀라운 효과

페로유체는 자기장에 노출되면 바늘 구조를 형성하고 하전된 판을 추가하면 미세한 물방울을 발사합니다.

자기장을 변경하여 페로유체의 방향을 조작할 수 있으며, 전극을 가까이 이동하면 연속적인 흐름을 형성할 수도 있습니다.

또한 이 물질은 하전된 물체에 반응하여 물체를 향해 솟구쳐 오르며 매혹적인 투영을 만들어낼 수도 있습니다.

우주 위성을 위한 강유체 추진의 잠재력

강유체 추진은 확장성이 뛰어난 유망한 우주 추진 기술입니다.

이 혁신은 향후 하늘을 가득 채우는 초소형 위성의 광범위한 사용으로 이어질 수 있습니다.

이 기술의 잠재력은 가장 멋진 우주 추진 기술 중 하나로 주목받고 있습니다.