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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1204
DTSTART:20081024T210000Z
DURATION:PT1H0M0S
DTSTAMP:20260506T205434Z
LAST-MODIFIED:20080930T140502Z
LOCATION:2241 Chamberlin Hall (coffee and cookies at 3:30 pm)
SUMMARY:Impact!\, Physics Department Colloquium\, Sid Nagel\, Universi
 ty of Chicago
DESCRIPTION:When a liquid drop or a fluid stream hits a solid target i
 t catastrophically deforms its shape in ways that can strongly violate
  our intuition. I will discuss two examples that raise issues about ho
 w a liquid interacts with itself and with its surroundings upon impact
 .  The first experiment concerns an ordinary drop hitting a smooth dry
  surface.  In this case the drop can create a splash in which a corona
  forms and breaks up into many small droplets.  The second experiment 
 deals with a granular stream hitting a target.  In this situation\, th
 e material acts like a liquid with zero surface tension and has implic
 ations for how scattering takes place even at the submicroscopic level
  in studies of the quark-gluon plasma.  A comparison of the granular j
 et with the heavy ion collisions raises questions about what it means 
 to be a liquid.
URL:https://www.physics.wisc.edu/events/?id=1204
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