Collective forces in scalar active matter

Soft Matter
Thomas Speck

Abstract

Large-scale collective behavior in suspensions of active particles can be understood from the balance of statistical forces emerging beyond the direct microscopic particle interactions. Here we review some aspects of the collective forces that can arise in suspensions of self-propelled active Brownian particles: wall forces under confinement, interfacial forces, and forces on immersed bodies mediated by the suspension. Even for non-aligning active particles, these forces are intimately related to a non-uniform polarization of particle orientations induced by walls and bodies, or inhomogeneous density profiles. We conclude by pointing out future directions and promising areas for the application of collective forces in synthetic active matter, as well as their role in living active matter.

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Citations

Sep 3, 2020·The Journal of Chemical Physics·S A MalloryA Cacciuto
Sep 25, 2020·Scientific Reports·Mahmoud Sebtosheikh, Ali Naji
Oct 21, 2020·Physical Review. E·Mahdi Zarif, Ali Naji
Jan 27, 2021·Soft Matter·P D NetaC S Dias
Nov 21, 2020·Physical Review. E·C Reichhardt, C J O Reichhardt
Nov 21, 2020·Physical Review. E·Siddhant MohapatraPallab Sinha Mahapatra
Mar 25, 2021·The European Physical Journal. E, Soft Matter·Nadir MöllerThomas Palberg
Apr 17, 2021·Physical Review Letters·Thomas Speck, Ashreya Jayaram
Jul 18, 2021·Physical Review. E·C Reichhardt, C J O Reichhardt

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