Why does pouring a beer into a glass at a 45 degree angle prevent excessive foam buildup?

Question

Why does pouring a beer into a glass at a 45 degree angle prevent excessive foam buildup?

In: Chemistry

Answer 1

The angle creates more surface area, which allows more of the CO2 gas to leave the liquid, which means there is less of a bottle neck for the gas to create foam.

Answer 2

It’s like the difference between going down a slide vs falling straight to the floor. The second one agitates the liquid more and creates more foam.

Answer 3

Less agitation means less CO2 released. When CO2 bubbles through the beer it makes the protein in the beer form bubbles.

Answer 4

Lower impact, lower stir up of the bubbles.

There is the will to find a balance between time filling beer, and storing up bubbles that form foam.