Pumping and Mixing in Active Pores

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

Publication Type: Journal article

Publication year: 2022

Journal

Physical Review Letters American Physical Society

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.

Authors with CRIS profile

Jens Harting Professur für Multiskalen-Modellierung für kontrollierte Filmbildung (HIERN)

Involved external institutions

Max Planck Institute for Intelligent Systems (MPI-IS) / Max-Planck-Institut für Intelligente Systeme

Germany (DE)

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://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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