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SUMMARY:IGM Colloquium: Bursting bubbles and the search for the smallest j
 et droplet
DTSTART:20180508T121500
DTEND:20180508T131500
DTSTAMP:20260610T154913Z
UID:ec75380dc17c0b7c5ceae6c9754b5cc69aed76057ab76f87504088ba
CATEGORIES:Conferences - Seminars
DESCRIPTION:James (Jacy) Bird\, Professor in the Department of Mechanical 
 Engineering at Boston University\nWhen a bubble bursts at an interface\, t
 he capillary waves create an intriguing cusp\, which is responsible for an
  upward jet that can break into droplets. This jet drop phenomena has been
  studied for over 60 years and is relevant to a variety of topics includin
 g the transport of respiratory pathogens and cloud-forming marine aerosols
 . Yet\, several fundamental questions remain\, including the physics that 
 sets the size of the smallest jet droplets.\nThis talk explores the dynami
 cs of jet drop formation through a combination of experiments and theory.
   The first part of this talk addresses how gravity and viscosity can inh
 ibit jet drop production. The dominant role of gravity appears to be its r
 ole in the setting the bubble shape. The second part of the talk explores 
 the size of the smallest aerosols produced. Microfluidic experiments\, dyn
 amic similitude\, and numerical simulations collectively reveal a mechanis
 m in which viscous stresses – both before and after the jet forms – se
 ts the size of these microscopic droplets.\n\nBio:\nJames Bird is an Assis
 tant Professor in the Department of Mechanical Engineering at Boston Unive
 rsity.  He received his B.S. from Brown University and his Ph.D. from Har
 vard University\, after which he completed an NSF Mathematical Science Pos
 tdoctoral Fellowship at MIT.  His research focuses on interfacial fluid d
 ynamics with an emphasis on the dynamics of drops and bubbles.  He is the
  recipient of a Fulbright Fellowship (2004)\, an NSF CAREER award (2014)\,
  and an ONR YIP award (2016).\n 
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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