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## Mathematicians Show Why Bubbles Sink in Nitrogen-Infused Stouts55

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

• #### Now that I know the theory (Score:5, Funny)

on Wednesday May 30, 2012 @01:28PM (#40157267)
Allow me to practice ...
• #### Is it replicatable? (Score:3, Funny)

on Wednesday May 30, 2012 @01:39PM (#40157367) Journal

I believe this study will end up receiving more than its fair share of replication and confirmation studies.

In fact, I can see several follow-up studies on if (and possibly why) this is specific to stout. How about a nice lager "control group" for the lads at table 3?

• #### party pooper (Score:5, Funny)

on Wednesday May 30, 2012 @01:43PM (#40157425)

That's an astout observation!

Hence, no stout for you, mister. ;)

• #### DO NOT (Score:5, Funny)

on Wednesday May 30, 2012 @01:50PM (#40157527) Journal

...I repeat DO NOT touch a pint glass and an anti-pint glass during a toast.

That is all.

• #### Location, location, location (Score:2, Funny)

by Anonymous Coward on Wednesday May 30, 2012 @02:00PM (#40157671)

Guiness is brewed in Ireland. The bubbles are made in Australia. When the can is opened the bubbles attempt to to up, but they are from Australia so they head the wrong way. Another pint of your finest, barkeep!

• #### Re:late to the party (Score:5, Funny)

on Wednesday May 30, 2012 @02:07PM (#40157819) Journal

Yeah, but the new research had to make sure it wasn't the Coriolis force!

• #### Negative ninety-nine bottles of beer on the wall. (Score:5, Funny)

on Wednesday May 30, 2012 @02:23PM (#40158071)

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

Just don't drink too many anti-pints of beer. I tried it once and woke up with a hell of a hangunder.

• #### Re:DO NOT (Score:4, Funny)

on Wednesday May 30, 2012 @03:00PM (#40158541) Journal
Only after a rather stout explosion, though.
• #### Re:Math (Score:4, Funny)

on Wednesday May 30, 2012 @03:13PM (#40158731) Journal
• #### Re:late to the party (Score:3, Funny)

on Wednesday May 30, 2012 @03:59PM (#40159441)
The underlying principle in science is to form a model and then test for confirmation or error. Clearly these dedicated professionals were testing in the name of science in case other forces were involved! In fact, I should do my part and run some tests of my own. I might also test some principles regarding gravity while I'm at it....
• #### Re:party pooper (Score:4, Funny)

on Wednesday May 30, 2012 @04:44PM (#40160189) Homepage Journal

You sound bitter.

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