Levich Institute Seminar Announcement, 03/22/2016
Steinman Hall, Room #312
(Chemical Engineering Conference Room)
Professor Sungyon Lee
Texas A&M University
Department of Mechanical Engineering
"Interfacial Dynamics: Drops & Particles"
This talk consists of two parts that consider the dynamics of the fluid-fluid interface for two different systems: droplets and particle-laden flows. In the first part of the talk, the stability of a partially wetting drop against wind is experimentally tested inside a wind tunnel and is rationalized by a simple, quasi-static model of a `depinning’ droplet. The reduced model incorporates the phenomenological description of the boundary layer into droplet dynamics and successfully captures the observed critical droplet behavior.? In the second part of the talk, we report a particle-induced fingering instability when a mixture of particles and viscous oil is injected radially into a Hele-Shaw cell. The experimental results show that the onset and characteristics of fingering are most directly affected by the particle volume fraction but also depend on the ratio of the particle to gap size. The physical mechanism behind the instability and a quantitative model based on the suspension balance approach are also discussed.
BRIEF ACADEMIC/EMPLOYMENT HISTORY
Sungyon Lee completed her Ph.D. and M.S. in Mechanical Engineering at Massachusetts Institute of Technology, and B.S. in Mechanical Engineering at University of California, Berkeley. After a post-doc at Ecole Polytechnique and adjunct faculty position in Applied Math at University of California, Los Angeles, she joined the Mechanical Engineering faculty at Texas A&M University in 2013. Her fluid mechanics research group specializes in reducing complex physical phenomena into tractable problems that can be visualized with table-top experiments and solved with mathematical modeling.
RECENT RESEARCH INTERESTS
Current research focuses on the theoretical and experimental investigation of the complex fluid systems ranging from drops and bubbles, particle-laden flows, to two-phase flows through porous media.