Title: Filtration and Fluid Mechanics Inspired by the Manta Ray - Reiss Lecture
Speaker: Peko Hosoi, Massachusetts Institute of Technology (MIT)
Abstract: HVAC systems account for about 20% of U.S. energy consumption of which at least 7% is consumed by fans. Their energy efficiency strongly depends on their filters: reducing resistance can result in significant energy savings. We explore novel strategies for filtration inspired by the manta ray, which has evolved a system for filtering zooplankton that appears to be unlike any industrial filtration mechanism. Instead of a sieve strategy, the manta deploys microstructures, which are hypothesized to instigate eddies that push particles away from the filtration pores, resisting clogging, and enabling the filtration of particles much smaller than the pore size. Using perturbation theory and asymptotics we examine two toy problems that mimic various features of the filtration strategies employed by manta rays and find that experimental data from wavy channels are consistent with our asymptotic predictions.
Zoom: https://northwestern.zoom.us/j/94670869656
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