Abstract:In order to leverage colloidal swimmers in microfluidic and drug-delivery applications, it is crucial to understand their interaction with obstacles. Previous studies have shown that this interaction can result in the hydrodynamic trapping in orbits around cylindrical obstacles, where the trapping strength heavily depends on the obstacle geometry and the flow field of the swimmer, and that Brownian motion is needed to escape the trap. Here, we use both experiments and simulations to investigate the interaction… Show more
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