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SUMMARY:A New Perspective on Shear Thickening of Dense Suspensions
DTSTART:20140325T140000
DTEND:20140325T150000
DTSTAMP:20260427T223639Z
UID:d8c0ee69accc36937f1103e09d8a740987b4c2fdc474f290b9cdd078
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Heinrich M. Jaeger\, University of Chicago\nDense suspen
 sions of particles in a liquid exhibit a number of counterintuitive\, non-
 Newtonian flow behaviors. Most remarkably\, the application of stress can 
 dramatically harden the material\, transforming it from a liquid state at 
 rest into a solid-like state when driven strongly.  Shear-thickening-base
 d models developed over the last 25 years cannot explain the observed larg
 e normal stresses (large enough to support a grown person's weight when ru
 nning across a pool filled with a suspension such as cornstarch in water).
  This talk surveys some of the key issues\, discusses the stress scales as
 sociated with shear thickening in dense suspensions\, and outlines a new s
 cenario for impact response.  In particular\, using high-speed video and 
 x-ray imaging during sudden impact\, we are able to link the nonlinear sus
 pension dynamics in a new way to the jamming phase transition.\nBio: Heinr
 ich Jaeger is the William J. Friedman and Alicia Townsend Professor of Phy
 sics at the University of Chicago. He received his Ph.D. in physics in 198
 7\, under Allen Goldman at the University of Minnesota\, working on ultrat
 hin superconducting films.  After a postdoc at the University of Chicago 
 1987-89\, Jaeger spent two years at the Centre for Submicron Technology of
  the University of Delft in The Netherlands. He has been on the faculty at
  Chicago since 1991\, directing the Chicago Materials Research Center from
  2001 – 2006\, and the James Franck Institute from 2007-2010. Jaeger’s
  current research focuses on investigations of self-assembled nanoparticle
 -based structures\, on the rheology of dense suspensions\, and on studies 
 of the packing and flow of granular materials.
LOCATION:ME B3 31 http://plan.epfl.ch/?lang=fr&room=ME+B3+31
STATUS:CONFIRMED
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