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Magnetohydrodynamics - Propelling Liquid Metal with Magnets!
About this video
Tech Ingredients explains the principles of magnetohydrodynamics and builds several demonstrations, including propelling liquid metal and electrolytes with magnets and a railgun-style setup.
Why it appears in the archive
It comes up as a great explainer on magnetohydrodynamic drives and pumps in threads about silent submarine propulsion.
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From the Hacker News discussion
There's a great video from one of my favorite YouTube channels about Magnetohydrodynamic drives. Really fascinating drive design and channel for anyone interested in engineering. [VIDEO]
Read original comment ↗Interesting. If I understand correctly, they need a electrode that's in physical contact with the sea water. I'm not sure I understand it entirely, but there's a video on the Tech Ingredients channel that explains magnetohydrodynamic pumps: [VIDEO]
Read original comment ↗If can get to 4 billion tesla I /think/ that's enough to generate electrons from the vacuum of space (see:schwinger magnetic induction) and you could do something akin to magnetohydrodynamics ( see: [VIDEO] ) which would use the magnetic field to accelerate the electrons away from the ship, I could be incorrect here though
Read original comment ↗