Spinning Sphere of Molten Sodium
Why Hacker News recommends it
Cited as a visual example of dynamo flows and of the care needed when handling reactive liquid sodium.
What it is
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.
Recommended by 0 HN commenters across 0 different months, 2020 to 2022.
What Hacker News said
Cites slavik81 · 2020-07 · on “Jpeg2png: Silky smooth JPEG decoding – no more artifacts (2016)”
I don't know about chlorine trifloride, but that is one of the strategies used for reactive substances, like molten sodium: [this video]
Cites willis936 · 2021-09 · on “Earth’s inner core is growing unevenly. Why isn’t the planet tipping?”
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. [this video]
Cites cryptonector · 2022-04 · on “Utilities Want to Convert Coal Plants to Nuclear; Skeptics Abound”
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] [this video]