When falling in a lighter miscible solvent, a drop of liquid deforms to a torus which thenbreaks up into several fragments or just disappears by diffusion. By using liquids of different compositionswe show the universal behaviour of the phenomenon, and its dependence on two nondimensionalnumbers, the fragmentation number F, and the Schmidt number S. While F marks the transition fromdiffusion to splitting, here we show the role of S in controlling the number of horizontal fragments afterthe first break-up. The process is explained in terms of competitions of different time scales.
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