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Magnetohydrodynamics - Propelling Liquid Metal with Magnets!

Tech Ingredients · 1.1M views · 2018-07-26 · 28:35

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Overview

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

On Hacker News

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

Recommended by 2 HN people across 2 months · HN mentions 2018–2023

Topics

Everyday physics & science demosFundamental physics3D printing, CNC & maker projects
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mhdliquid metalmagnetspropulsionelectrolytes

What people said

bloudermilk · 2020-01 · Strong recommendation

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]

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elihu · 2023-06 · Recommendation

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]

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macromaniac · 2018-09 · Reference

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

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Sources

Video by Tech Ingredients, played through YouTube.

Data and selection notes

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