Levich Institute Seminar Announcement, 02/10/2015
Steinman Hall, Room #312
(Chemical Engineering Conference Room)
Professor Jonathan Katz
Washington University in St. Louis
Department of Physics
"Hysteresis and Lubrication in Shear Thickening of Cornstarch Suspensions"
We have observed large amplitude hysteresis of shear thickened cornstarch suspensions: They may remain in the jammed thickened state as the strain rate is reduced, but an unjamming front may propagate from unjammed regions. Transient thickening is observed at strain rates below the DST threshold, and above it the stress fluctuates. I will discuss simple frictional interpretations, and compare to other non-Brownian suspensions. I will also describe a simple mean field model for shear thinning of non-Brownian suspensions.
BRIEF ACADEMIC/EMPLOYMENT HISTORY
Professor of Physics, Washington University, St. Louis