Passive objects in confined active fluids: a localization transition
arXiv:2206.13544 · doi:10.1103/PhysRevE.106.044604
Abstract
We study how walls confining active fluids interact with asymmetric passive objects placed in their bulk. We show that the objects experience non-conservative long-ranged forces mediated by the active bath. To leading order, these forces can be computed using a generalized image theorem. The walls repel asymmetric objects, irrespective of their microscopic properties or their orientations. For circular cavities, we demonstrate how this may lead to the localization of asymmetric objects in the center of the cavity, something impossible for symmetric ones.
References in corpus (13)
- Novel type of phase transition in a system of self-driven particles
- Interaction Ruling Animal Collective Behaviour Depends on Topological rather than Metric Distance: Evidence from a Field Study
- Motility-Induced Phase Separation
- Spontaneous motion in hierarchically assembled active matter
- Statistical Mechanics of Interacting Run-and-Tumble Bacteria
- Pressure and Phase Equilibria in Interacting Active Brownian Spheres
- Sedimentation, trapping, and rectification of dilute bacteria
- Pattern formation in self-propelled particles with density-dependent motility
- Self-Propelled Rods near Surfaces
- The Anomalous Transport of Tracers in Active Baths
- Disordered boundaries destroy bulk phase separation in scalar active matter
- Force generation in confined active fluids: The role of microstructure
- Steady states of active Brownian particles interacting with boundaries