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 (35)
- Novel type of phase transition in a system of self-driven particles
- Active Particles in Complex and Crowded Environments
- 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
- Motility-driven glass and jamming transitions in biological tissues
- A bacterial ratchet motor
- Pressure is not a state function for generic active fluids
- Pressure and Phase Equilibria in Interacting Active Brownian Spheres
- Sedimentation, trapping, and rectification of dilute bacteria
- Active Brownian Particles and Run-and-Tumble Particles: a Comparative Study
- Pattern formation in self-propelled particles with density-dependent motility
- Swarming, Schooling, Milling: Phase diagram of a data-driven fish school model
- Run-and-tumble particle in one-dimensional confining potential: Steady state, relaxation and first passage properties
- Generalized Thermodynamics of Phase Equilibria in Scalar Active Matter
- Active particles with soft and curved walls: Equation of state, ratchets, and instabilities
- Self-Propelled Rods near Surfaces
- Interrupted Motility Induced Phase Separation in Aligning Active Colloids
- Freezing a Flock: Motility-Induced Phase Separation in Polar Active Liquids
- Generic long-range interactions between passive bodies in an active fluid
- On the distribution and swim pressure of run-and-tumble particles in confinement
- Dynamics and density distribution of strongly confined noninteracting nonaligning self-propelled particles in a nonconvex boundary
- Active particles under confinement: Aggregation at the wall and gradient formation inside a channel
- Mechanical pressure and momentum conservation in dry active matter
- The Anomalous Transport of Tracers in Active Baths
- Steady-state distributions of ideal active Brownian particles under confinement and forcing
- Nonlinear Rheology in a Model Biological Tissue
- Disorder-Induced Long-Ranged Correlations in Scalar Active Matter
- Stresses in non-equilibrium fluids: Exact formulation and coarse grained theory
- Disordered boundaries destroy bulk phase separation in scalar active matter
- Bodies in an Interacting Active Fluid: Far-Field Influence of a Single Body and Interaction Between Two Bodies
- Force generation in confined active fluids: The role of microstructure
- Steady states of active Brownian particles interacting with boundaries
- Activated diffusiophoresis