Shape oscillation of a levitated drop in an acoustic field

Video from the paper “Shape oscillation of a levitated drop in an acoustic field,“ by W. Ran & S. Fredericks (Clemson University, Department of Mechanical Engineering), Abstract: “A ’star drop’ refers to the patterns created when a drop, flattened by some force, is excited into shape mode oscillations. These patterns are perhaps best understood as the two dimensional analog to the more common three dimensional shape mode oscillations. In this fluid dynamics video an ultras