Levich Institute Seminar Announcement, 03/09/2010
Tuesday, 03/09/2010
2:00 PM
Steinman Hall, Room #312
(Chemical Engineering Conference Room)

Professor Martin Maxey
Brown University
Division of Applied Mathematics and Director of the Center for Fluid Mechanics

"Dynamics of Non-Brownian Suspensions in Couette Flows"


ABSTRACT


Many suspensions such as corn starch in liquid or superparamagnetic beads used in biomedical assays involve particles in the O(10) micron range for which thermal (Brownian) agitation is not significant as the suspensions are sheared. The effect of a shear flow is to drive these into non-equilibrium states, both ordered and disordered. This is apparent for spatially confined shear flows where rigid wall introduce significant structure. Results of recent numerical simulations of fully three-dimensional Couette flows will be presented for suspensions of spherical particles for dense suspensions over the range of particle volume fractions 20% - 60%. The issues posed in describing the near-wall dynamics in confined shear flows will be discussed together with broader issues of characterizing particle interactions in non-Brownian suspensions.

BRIEF ACADEMIC/EMPLOYMENT HISTORY

Martin Maxey completed his undergraduate and graduate education at the University of Cambridge and received his Ph.D. in Applied Mathematics and Theoretical Physics in 1979. He held a post-doctoral position in the Department of Mechanics and Materials Science at the Johns Hopkins University and subsequently was a lecturer in the Department of Chemical Engineering at Johns Hopkins. He joined the Division of Applied Mathematics at Brown University in 1982. He is presently Professor of Applied Mathematics and Engineering and since 1991 has served as Director of the Center for Fluid Mechanics, Turbulence and Computation. He is a member of the editorial board for the International Journal of Multiphase Flow, associate editor of Fluid Dynamics Research and is a fellow of the American Physical Society.

RECENT RESEARCH INTERESTS

Professor Maxey's recent research includes the dynamics of particle suspensions, self-assembly of paramagnetic particles in suspension, artificial micro-swimmers, chemotaxis of bacteria as well the interactions of particles in turbulent flows.