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Phoenix666 writes:

Phys.org:

A team of researchers from Osaka University and Kirin Holdings Company, Limited demonstrated that the texture formation in a pint glass of Guinness beer is induced by flow of a bubble-free fluid film flowing down along the wall of the glass, a world first. This phenomenon is found to be analogous to roll waves commonly observed in water sliding downhill on a rainy day. Their research results were published in Scientific Reports.

Guinness beer, a dark stout beer, is pressurized with nitrogen gas. When it is poured into a pint glass, small-diameter bubbles (only 1/10 the size of those in carbonated drinks such as soda and carbonated water) disperse throughout the entire glass and the texture motion of the bubble swarm moves downward.

[...] Because the opaque and dark-colored Guinness beer obstructs physical observation in a glass, and computation using supercomputers is necessary to conduct numerical simulation of flows including a vast number of small bubbles in the beer, the team of researchers led by Tomoaki Watamura produced transparent "pseudo-Guinness fluid" by using light particles and tap water. They filmed the movement of liquid with a high-speed video camera, using laser-induced-fluorescence in order to accurately measure the movement of fluid. In addition, using molecular tags, they visualized the irregular movement of the fluid.

Beer is already proof God loves us and wants to be happy.

Original Submission