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SUMMARY:MechE Colloquium: Bursting bubbles and the search for the smallest
  jet droplet
DTSTART:20180508T121500
DTEND:20180508T131500
DTSTAMP:20260506T221334Z
UID:c3bf18a6b56442e51b4a7b1c3d8b88055ab7cfb1bb018d5fc0c688ef
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. James (Jacy) Bird\, Fluid Lab\, Department of Mechanical
  Engineering\, Boston University\nAbstract:\nWhen a bubble bursts at an in
 terface\, the capillary waves create an intriguing cusp\, which is respons
 ible for an upward jet that can break into droplets. This jet drop phenome
 na has been studied for over 60 years and is relevant to a variety of topi
 cs including the transport of respiratory pathogens and cloud-forming mari
 ne aerosols. Yet\, several fundamental questions remain\, including the ph
 ysics that sets the size of the smallest jet droplets.\n\nThis talk explor
 es the dynamics of jet drop formation through a combination of experiments
  and theory.  The first part of this talk addresses how gravity and visco
 sity can inhibit jet drop production. The dominant role of gravity appears
  to be its role in setting the bubble shape. The second part of the talk e
 xplores the size of the smallest aerosols produced. Microfluidic experimen
 ts\, dynamic similitude\, and numerical simulations collectively reveal a 
 mechanism in which viscous stresses – both before and after the jet form
 s – sets the size of these microscopic droplets.\n\nBio:\nJames Bird is 
 an Assistant Professor in the Department of Mechanical Engineering at Bost
 on University.  He received his B.S. from Brown University and his Ph.D. 
 from Harvard University\, after which he completed an NSF Mathematical Sci
 ence Postdoctoral Fellowship at MIT.  His research focuses on interfacial
  fluid dynamics with an emphasis on the dynamics of drops and bubbles.  H
 e is the recipient of a Fulbright Fellowship (2004)\, an NSF CAREER award 
 (2014)\, and an ONR YIP award (2016).
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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