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Beer Math Idle

Mathematicians Show Why Bubbles Sink in Nitrogen-Infused Stouts 55

SicariusMan writes "The age old question: do Guinness and other stouts' bubbles really sink, or is it an optical illusion? Well, some mathematicians have figured it out." Full paper via arXiv; From the article: "To analyze the effect of different glass shapes, the mathematicians modeled Guinness beer containing randomly distributed bubbles in both a pint glass and an anti-pint glass (i.e., an upside-down pint). An elongated swirling vortex forms in both glasses, but in the anti-pint glass the vortex rotates in the opposite direction, causing an upward flow of fluid and bubbles near the wall of the glass."
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Mathematicians Show Why Bubbles Sink in Nitrogen-Infused Stouts

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It seems that more and more mathematicians are using a new, high level language named "research student".

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