Breakup of the tail of a bubble in a non-Newtonian fluid

We study the shapes of air bubbles ascending in non Newtonian fluids. For certain conditions, the tail adopts unexpected geometries. This video was selected to appear in the Gallery of Fluids motion (Soto, E., Zenit, R. and Manero, O. Break up of the tail of a bubble in a non Newtonian fluid. Physics of Fluids,20, 091110, 2008)

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