Levich Institute Seminar Announcement, 08/29/2017
Steinman Hall, Room #312
(Chemical Engineering Conference Room)
Dr. Jonghun Lee
Argonne National Laboratory
"The Role of an Order-to-Disorder Transition in Shear Thickening"
Shear thickening is a ubiquitous phenomenon that occurs in many complex fluids but its underlying mechanism remains under considerable debate. In particular, how an order-to-disorder transition is related to shear thickening is not clearly understood. Here, using high resolution in situ small angle x-ray scattering in conjunction with oscillatory shear on a highly monodispersed silica suspensions, we demonstrate that an order-to-disorder transition can lead to a dynamic shear thickening in a stress regime lower than the shear thickening induced by other mechanisms.
BRIEF ACADEMIC/EMPLOYMENT HISTORY
Dr. Jonghun Lee earned his Ph.D. in Chemistry at Brown University in 2014. During his Ph.D., he developed synthesis and assembly of nanoparticles for solution process to make transparent conducting thin films.
RECENT RESEARCH INTERESTS
As a postdoctoral fellow at Argonne National Laboratory, Dr. Lee is currently studying rheological behaviors of complex fluids and their correlated microstructures using in situ x-ray scattering studies.