Magnetohydrodynamics - Propelling Liquid Metal with Magnets! on HackerTube: recommended by 2 Hacker News commenters across 2 separate months, 2018–2023.
explainer · intermediate · evergreen
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.
“There's a great video from one of my favorite YouTube channels about Magnetohydrodynamic drives.”
3 Hacker News comments link this video. Each one links back to its thread.
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
in “The propeller is giving way to the pump-jet propulsor on larger submarines” · View on HN
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
in “Taking a New Look at Fundamental Tech for Quiet Undersea Propulsion” · View on HN
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
in “Magnetic Field Record Set with a Bang: 1,200 Tesla” · View on HN