Levich Institute Seminar Announcement, 02/26/2016
Steinman Hall, Room #312
(Chemical Engineering Conference Room)
Dr. Alban Sauret
CNRS, SVI Laboratory, Aubervilliers, France
"Erosion and Spreading of Granular Material "
[Please note this replaces the seminar date originally scheduled on Tuesday, 03/01/2016]
Granular media constitute a complex material that can rest like a solid, flow like a liquid but also interact with a surrounding fluid. In this talk, I discuss two recent studies devoted to direct or indirect shaping of a granular medium. We first consider the spreading of a granular media with a blade, a situation encountered in applications that range from the bulldozing of snow to coating processes. We rely here on a model experiment to characterize the three-dimensional spreading on a flat surface and we rationalize the deposited pattern through the granular flow in the bulldozed dune. The second situation involves the erosion of a granular bed by a fluid flow. Indeed, some bottom-dwelling fish, such as the flounders, generate a flow capable of resuspending sand, to avoid predators. By flapping their fins, they create vortices that lift the sand particles up and deposit them on top of their backs. A model experiment has been developed to study this situation and characterize the onset of the erosion of the granular bed.
BRIEF ACADEMIC/EMPLOYMENT HISTORY
Alban Sauret is a research scientist at CNRS in France. He received his PhD in mechanical engineering from Aix-Marseille University (France). He was a fellow of the Geophysical Fluid Dynamics Program at Woods Hole in 2012 and a Postdoctoral Research Associate at Princeton University with Prof. H. A. Stone in 2013-2014. Since 2014, he is working in the "Surfaces, Glass and Interfaces" laboratory that is a joint CNRS and Saint-Gobain research center and has a joint appointment with the FAST Laboratory (Orsay, France). He is also a visiting academics at the NYU Tandon School of Engineering in the "Particles, Interfaces and Fluids lab".
RECENT RESEARCH INTERESTS
My current research addresses various problems related to fluid mechanics, granular materials, suspensions and soft matter. It generally involves a combination of experiments, analytical modeling and numerical simulations. For instance, I have recently worked on damping of sloshing by liquid foams, clogging of microchannels by colloidal suspensions, the imbibition of flowing granular media, erosion processes, and wetting in fibrous media.