Moyen amphi (LPS
Bât 510, Orsay (91)


17 Fév 2023


11h00 - 12h00

Cari Dutcher – Soft Interfaces with Microfluidics: Aerosols, Emulsions, and Foams

University of Minnesota

Soft interface-rich multiphase systems such as foams, emulsions, and aerosols are all around us.  To characterize the multiphase system dynamics and stability, often information about the thermodynamic and material properties of the interfaces is needed.  Microscale and microfluidic platforms can enable measurements of these soft interfaces at length and timescales of interest to the multiphase applications.  These advanced micro platforms can generate, detect, manipulate, and sort microscale droplets and bubbles in an enclosed environment without large and expensive control systems. In this talk, I highlight our group’s approach to measuring dynamic surface and interfacial tension, thin film stability during coalescence, and droplet phase using microfluidic contractions, traps, and wells.  Experiments are performed across a range of droplet sizes, viscosity ratios, and surfactant concentrations.

Bio: Cari S. Dutcher is an Associate Professor of Mechanical Engineering (ME) and Chemical Engineering and Materials Science (CEMS) at the University of Minnesota, Twin Cities. Her research interests are in complex fluids and multiphase fluids, including aerosols, emulsions, and foams.  Cari currently serves on the Executive Board of the American Association of Aerosol Research (AAAR) and Editorial Board of Aerosol Science and Technology. Since starting her faculty position in 2013, Cari has received the 3M Non-Tenured Faculty Award, NSF CAREER Award, AAAR Kenneth T. Whitby Award, George Taylor Career Development Award, and SERDP WP Project of the Year.  Cari received her B.S from Illinois Institute of Technology (2004) and her Ph.D. from the University of California, Berkeley (2009), both in Chemical Engineering.