What gentlemen don't know about the true effects of 'beer foam'?

Men who drink beer often wonder, "Do they ever think about the purpose of beer foam?" - A group of European researchers conducted a serious study on beer foam.

Beer foam is formed by the absorption of surface-active substances by CO2. Beer foam is carbon dioxide foam in a glass of beer that appears as bubbles floating on the surface of the beer, or running down the side of the glass, or as tiny dots clinging to the sides of the glass.

When pouring beer from a bottle/can, the foam always rises to the surface, threatening to overflow the glass, then slowly settles and dissipates, but it never completely disappears.

Illustrative image

Beer foam is an extremely important part of beer in determining its quality. A glass of beer without foam indicates that it is a bland and even bitter beer.

The foam on top of the beer melts, releasing a small amount of beer into the air, creating the beer's aroma.

Dr. François Gallaire, a physicist living in Switzerland, and his colleagues conducted research on beer. They discovered something that contradicted long-held theories about the motion of fluids.

Especially when the beer swirls around in the tank, losing energy and becoming smaller and smaller, and never stopping completely.

Anyone who studies beer glasses knows that after a waiter places a glass of beer on the table, the beer continuously sloshes. Why is beer different from other liquids?

The answer is: Beer waves are caused by the foam. The small waves in a glass of beer subside slowly due to capillary action that stretches the surface. These small waves can even persist indefinitely. That's why you see foam remaining in a glass of beer even after it's been emptied. Because of the foam, the beer continues to slosh and froth.

The research team experimented with soapy water instead of beer. They found that the tiny bubbles in beer foam increased the interface between the liquid and the air. Therefore, the greater the capillary force, the more the beer frothed.

Therefore, the beautiful girls at the Oktoberfest beer festival in Germany are able to continuously carry out mugs of beer that are constantly bubbling with white foam.

Does studying beer offer any other benefits? - Absolutely. The concept of beer can lead to broader associations with other physical applications.

For example, fuel turbulence in rockets or in tankers of oil tankers can cause dangerous imbalances. A thin layer of beer foam can eliminate these unfortunate hazards.

According to VietQ.vn