Pumping and Mixing in Active Pores

Antunes GC, Malgaretti P, Harting J, Dietrich S (2022)


Publication Type: Journal article

Publication year: 2022

Journal

Book Volume: 129

Article Number: 188003

Journal Issue: 18

DOI: 10.1103/PhysRevLett.129.188003

Abstract

We show both numerically and analytically that a chemically patterned active pore can act as a micro- or nanopump for fluids, even if it is fore-aft symmetric. This is possible due to a spontaneous symmetry breaking which occurs when advection rather than diffusion is the dominant mechanism of solute transport. We further demonstrate that, for pumping and tuning the flow rate, a combination of geometrical and chemical inhomogeneities is required. For certain parameter values, the flow is unsteady, and persistent oscillations with a tunable frequency appear. Finally, we find that the flow exhibits convection rolls and hence promotes mixing in the low Reynolds number regime.

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How to cite

APA:

Antunes, G.C., Malgaretti, P., Harting, J., & Dietrich, S. (2022). Pumping and Mixing in Active Pores. Physical Review Letters, 129(18). https://dx.doi.org/10.1103/PhysRevLett.129.188003

MLA:

Antunes, G. C., et al. "Pumping and Mixing in Active Pores." Physical Review Letters 129.18 (2022).

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