Bulletin of the American Physical Society
75th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 20–22, 2022; Indiana Convention Center, Indianapolis, Indiana.
Session X01: Francois Frenkiel Award for Fluid Mechanics Talk
11:40 AM–12:00 PM,
Tuesday, November 22, 2022
Room: Sagamore 123
Chair: Ory Schnitzer, Imperial College London
Abstract: X01.00001 : Chemically-active drops swimming near a wall
11:40 AM–12:00 PM
Active drops are typically not neutrally-buoyant and evolve at small finite distances from rigid boundaries. Yet, existing theoretical models ignore this fundamental feature and systematically focus on unbounded flows. We bridge here this gap in understanding, to obtain a critical physical insight on the emergence of self-propulsion of active drops along a rigid wall. Specifically, by analyzing the linear stability of the full hydro-chemical problem, we show that, and explain why, a reduction in the drop-wall separation actually promotes the drop’s self-propulsion.
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