Physicists Explore Math Behind Tetris-like Growth of Coffee Rings

Posted on January 19, 2013

University of Pennsylvania physicists are exploring the math behind the Tetris-like growth of coffee rings. The physicists discovered that different particles make smoother or rougher deposition profiles at the drop edge depending on their shape. They also found the growth profiles involved in coffee rings test mathematical concepts that could also be relevant in industrial coating applications. The physicists say in a press release that they are examining two different mathematical processes involved with coffee ring growth. They include "Poisson" and "Kardar-Parisi-Zhang (KPZ)" processes. The research was published here in Physical Review Letters. Take a look: