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Guinness bubbles really do sink.

jjlaughner

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People celebrating St. Patrick's Day Wednesday can cross one topic of conversation off their lists.

vert.guinness.jpg

Guinness bubbles really do sink.

Scientists said Monday they had finally proved that the dark stout's creamy bubbles defy expectations and flow down instead of upwards.

"Our group carried out preliminary experiments at a local pub a few years ago, but the results proved inconclusive," said Dr. Andrew Alexander, from the University of Edinburgh's School of Chemistry.

They first thought the dark liquid flowing down as a pint was poured gave the illusion the bubbles were going down as well.

Now close examination has revealed that, as a pint settles, bubbles touching the walls of the glass experience drag, similar to that a person feels sliding their finger along glass, and that prevents them floating up.

The bubbles in the middle however, are free to rise, creating a circular flow within the glass that causes bubbles at the edge to be pushed downwards on the inside surface of the glass.

The Edinburgh team, working with researchers at Stanford University in California have produced high-speed video footage of the sinking bubbles -- to put at rest the minds of any drinkers who might have felt they were seeing things.
 

jakeslim

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taste like a glass of soy sauce...not for me /forums/images/graemlins/shame.gif
 

Corey 78K5

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With out a dout the best stout ever made /forums/images/graemlins/bow.gif /forums/images/graemlins/bow.gif /forums/images/graemlins/bow.gif
 

BlueBlazer

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Damn right, you guys ever had a snakebite, Guiness and Woodchuck, I could drink that stuff every night.
 

jjlaughner

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[ QUOTE ]
Damn right, you guys ever had a snakebite, Guiness and Woodchuck, I could drink that stuff every night.

[/ QUOTE ]

HELL YEAH! PSSST... you for got harps and bass /forums/images/graemlins/waytogo.gif
BLACK n' TANs all day long!
 

jjlaughner

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[ QUOTE ]
Isn't it because the bubbles are composed of Nitrogen?

/forums/images/graemlins/dunno.gif

[/ QUOTE ]

Have you seen the disks in the cans? Like a little nitrogen filled frisbie looking thing. Draft is by far the best though.
 

Tweetysuarus

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There is a BIG difference between US Guinness and UK Guinness in taste and thickness!JMO! I like UK's version better! /forums/images/graemlins/peace.gif
Bill
 

bigburban383

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[ QUOTE ]
People celebrating St. Patrick's Day Wednesday can cross one topic of conversation off their lists.

vert.guinness.jpg

Guinness bubbles really do sink.



[/ QUOTE ]

Dude are you kidding. Read this slowly and carefully:

"Now close examination has revealed that, as a pint settles, bubbles touching the walls of the glass experience drag, similar to that a person feels sliding their finger along glass, and that prevents them floating up.

The bubbles in the middle however, are free to rise, creating a circular flow within the glass that causes bubbles at the edge to be pushed downwards on the inside surface of the glass."

The bubbles dont sink, they are forced down by the circular motion of the bubbles on the inside not touching the walls.
 
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