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SUMMARY:Two stories on Ostwald ripnening in microfluidic devices - Charles
  Baroud (École polytechnique)
DTSTART:20170224T160000Z
DTEND:20170224T170000Z
UID:TALK70323@talks.cam.ac.uk
CONTACT:Doris Allen
DESCRIPTION:I will first discuss the mechanical resistance of an armoured 
 bubble\, as a microscopic model of a pickering emulsion. In particular I w
 ill show measurements that contradict the classical elastic models of part
 icle shells. Instead we find scalings that show that the shell behaves in 
 a plastic way\, which has important implications on the stability of Picke
 ring emulsions. Next I will discuss the transition of how a highly monodis
 perse population of bubbles reaches the self-similar regime of ripening fo
 ams. The transition is found to take place through two successive dynamica
 l regimes\; the first corresponds to the nucleation and growth of disorder
 ed regions\, followed by a second period that sees the increase in the pol
 ydispersity within these regions.
LOCATION:MR2\, Centre for Mathematical Sciences\, Wilberforce Road\, Cambr
 idge
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