I've noticed patterns quite like these (viz. #5, 11-13) on the surface of beer in a pint glass. I've speculated it's the result of either the different sizes of

I've noticed patterns quite like these (viz. #5, 11-13) on the surface of beer in a pint glass. I've speculated it's the result of either the different sizes of bubbles or differing rates at carbonation sites, but I hadn't noticed the similarity to Chladni patterns.