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    Magnetohydrodynamics - Propelling Liquid Metal with Magnets!

    Tech Ingredients

    2 HN recommenders · recommended in 3 months, 2018–2023

    YouTube

    28:35 · 1.1M views · Jul 26, 2018

    Tech Ingredients explains the principles of magnetohydrodynamics and builds several demonstrations, including propelling liquid metal and electrolytes with magnets and a railgun-style setup.

    It comes up as a great explainer on magnetohydrodynamic drives and pumps in threads about silent submarine propulsion.

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    3 comments from Hacker News

    1. @bloudermilkJan 2020· in “The propeller is giving way to the pump-jet propulsor on larger submarines”

      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. this video

      Strongly recommendsView on HN
    2. @elihuJun 2023· in “Taking a New Look at Fundamental Tech for Quiet Undersea Propulsion”

      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: this video

      RecommendsView on HN
    3. @macromaniacSep 2018· in “Magnetic Field Record Set with a Bang: 1,200 Tesla”

      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: this video ) which would use the magnetic field to accelerate the electrons away from the ship, I could be incorrect here though

      CitesView on HN