Spinning Sphere of Molten Sodium

Veritasium · 3.1M views · 2018-07-14 · 8:27

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Overview

Veritasium shows an experiment from Prof. Dan Lathrop's lab with a spinning sphere of molten sodium, used to study how turbulent convection in Earth's core generates a magnetic field. It is a short demonstration of dynamo physics.

On Hacker News

Cited as a visual example of dynamo flows and of the care needed when handling reactive liquid sodium.

Discussed on HN; no positive recommendation is recorded in this export · HN mentions 2020–2022

Topics

Everyday physics & science demos Geology & earth science

What people said

cryptonector · 2022-04 · Reference
Considering our very recent understanding of sodium Coulombic explosions[0], using liquid sodium for... anything requires an enormous amount of care[1]. [0] [LINK] [1] [VIDEO]
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willis936 · 2021-09 · Reference
I thought it was well-accepted that current flows and their resultant magnetic fields were the dominant forces in the Earth's core. Modeling a chaotic dynamo is difficult, but people are working on it. The more I think about it, the more annoyed I am with this article. [VIDEO]
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slavik81 · 2020-07 · Reference
I don't know about chlorine trifloride, but that is one of the strategies used for reactive substances, like molten sodium: [VIDEO]
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Sources

Video by Veritasium, played through YouTube.

HN Library · Source license

Data and selection notes

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