Animated beer smooth to pour

CSIRO fluids researcher Dr Mahesh Prakash says the physics of bubble creation in carbonated drinks like beer is complex. "As you pour beer into a glass, you see bubbles appearing on what are called nucleation sites, where the glass isn't quite smooth," Dr Prakash says. "The bubbles expand to a certain size then rise up in streams to the surface, where they bump into each other and form a raft of foam that floats on the top"........
Source: Technology blog