Brown University School of Engineering

Fluids at Brown, Division of Applied Mathematics Fluids and Thermal Sciences, School of Engineering Joint Seminar Series

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Tuesday, March 20, 2018 3:00pm - 4:00pm

A touch of non-linearity at intermediate Reynolds numbers: where spheres “think” collectively and swim together. Daphne Klotsa University of North Carolina at Chapel Hill ABSTRACT: From crawling cells to orca whales, swimming in nature occurs at different scales. The study of swimming across length scales can shed light onto the biological functions of natural swimmers or inspire the design of artificial swimmers with applications ranging from targeted drug delivery to deep-water explorations. In this talk, I will present experiments and simulations of how oscillating spheres, universally simple geometric objects, can utilize non-linearities to demonstrate complex pattern formation in a granular system, or different swimming behaviors in a spherobot (robot made out of spheres) when placed in a fluid at intermediate Reynolds numbers. I will talk about how a simple swimmer transitions from rest to motility and then switches direction as a function of the Reynolds number.