Why The Bubbles In Guinness Go Downwards
Estimated reading time: 3 minute(s)
In all carbonated beverages bubbles are known to go upwards, in the beer Guinness this is strangely not the case. Recently the secret was uncovered as to why bubbles go down in this very special beer.
They used a super-fast camera that magnified the bubbles to 1000 percent of their normal size and zoomed in on their behavior.
They found that the bubbles rose rapidly at the center of the glass, pulling the surrounding liquid with them and setting up a circulating current while the outlying bubbles moved downwards. Meaning the bubbles dont actually just go downwards, but really fast upwards!
Senior researcher Dr Andrew Alexander, who lectures in chemical physics at the University of Edinburgh, said he had wanted to do this experiment since drinking Guinness as a student.