Explain the phenomenon of foaming beer when smashed into the mouth of the bottle

The secret slapped a mouthful of new beer in the mouth of someone, and then stood back away to see the bubbling foam seeping into the floor was a classic trick to spark excitement at parties. French and Spanish researchers have discovered the scientific principle behind this phenomenon.

Javier Rodriguez-Rodriguez, the head of research from the University of Carlos III (Spain), said the bubbling phenomenon is a mechanism in which bubbles appear in a liquid like beer after collision. touch. This phenomenon is related to common technical concerns, such as the ship's propeller corrosion.

After a sudden smash into the mouth of the beer bottle, movement back and forth of the compression and expansion waves will make the bubbles appear and break quickly.

The results of the study of liquid interactions inside beer bottles show that the breakdown of "mother" bubbles formed from foaming creates "small" carbonic bubble clouds, but growing and bulging faster than the "mother" bubble. The rapid expansion of "baby" bubbles has resulted in bubbling bubbles up , forming bunches of bubbles of a mushroom-like shape as observed after a big explosion.

"And this is why foams form so easily explosive: the bigger the bubbles, the faster they will float and vice versa. This is because, moving bubbles quickly catches much carbon dioxide. more, " explained Rodriguez.

The rapid expansion of "baby" bubbles has led to foaming phenomenon.

Dr. Rodriguez revealed, his work and his colleagues, explain the feature of anisotropic process that takes place inside a beer bottle, within the first few seconds after a collision. Practically, this discovery can also be applied to other technical systems and to help experts understand the serious phenomena in nature, such as the sudden release of carbon dioxide in disasters. Lake Nyos in Cameroon in 1986, suffocated 1,700 people living nearby.