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Universal optimal geometry of minimal phoretic pumps
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AbstractUnlike pressure-driven flows, surface-mediated phoretic flows provide efficient means to drive fluid motion on very small scales. Colloidal particles covered with chemically-active patches with nonzero phoretic mobility (e.g. Janus particles) swim using self-generated gradients, and similar physics can be exploited to create phoretic pumps. Here we analyse in detail the design principles of phoretic pumps and show that for a minimal phoretic pump, consisting of 3 distinct chemical patches, the optimal arrangement of the patches maximizing the flow rate is universal and independent of chemistry.
Title: Universal optimal geometry of minimal phoretic pumps
Description:
AbstractUnlike pressure-driven flows, surface-mediated phoretic flows provide efficient means to drive fluid motion on very small scales.
Colloidal particles covered with chemically-active patches with nonzero phoretic mobility (e.
g.
Janus particles) swim using self-generated gradients, and similar physics can be exploited to create phoretic pumps.
Here we analyse in detail the design principles of phoretic pumps and show that for a minimal phoretic pump, consisting of 3 distinct chemical patches, the optimal arrangement of the patches maximizing the flow rate is universal and independent of chemistry.
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