Upcoming Seminar

Two stories on Ostwald ripnening in microfluidic devices
Charles Baroud (École polytechnique)
I will first discuss the mechanical resistance of an armoured bubble, as a microscopic model of a pickering emulsion. In particular I will show measurements that contradict the classical elastic models of particle shells. Instead we find scalings that show that the shell behaves in a plastic way, which has important implications on the stability of Pickering emulsions. Next I will discuss the transition of how a highly monodisperse population of bubbles reaches the self-similar regime of ripening foams. The transition is found to take place through two successive dynamical regimes; the first corresponds to the nucleation and growth of disordered regions, followed by a second period that sees the increase in the polydispersity within these regions.
Fluid Mechanics (DAMTP)
Fri, 24 Feb 2017 16:00

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