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Phoretic flow induced by asymmetric confinement

dc.creatorLisicki, M
dc.creatorMichelin, Sébastien
dc.creatorLauga, Eric Jean-Marie
dc.description.abstractInternal phoretic flows due to the interactions of solid boundaries with local chemical gradients may be created using chemical patterning. Alternatively, we demonstrate here that internal flows might also be induced by geometric asymmetries of chemically homogeneous surfaces. We characterise the circulatory flow created in a cavity enclosed between two eccentric cylindrical walls of uniform chemical activity. Local gradients of the diffusing solute induce a slip flow along the surface of the cylinders, leading to a circulatory bulk flow pattern which can be solved analytically in the diffusive limit. The flow strength can be controlled by adjusting the relative positions of the cylinders, and an optimal configuration is identified. These results provide a model system for tunable phoretic pumps.
dc.publisherCambridge University Press
dc.publisherJournal of Fluid Mechanics
dc.subjectbiological fluid dynamics
dc.subjectlow-Reynolds-number flows
dc.subjectmicro-/nano-fluid dynamics
dc.titlePhoretic flow induced by asymmetric confinement

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