Emergent vortices and phase separation in systems of chiral active particles with dipolar interactions

Abstract

Using Brownian dynamics (BD) simulations we investigate the self-organization of a monolayer of chiral active particles with dipolar interactions. Each particle is driven by both, translational and rotational self-propulsion, and carries a permanent point dipole moment at its center. The direction of the translational propulsion for each particle is chosen to be parallel to its dipole moment. Simulations are performed at high dipolar coupling strength and a density below that related to motility-induced phase separation in simple active Brownian particles. Despite this restriction, we observe a wealth of phenomena including formation of two types of vortices, phase separation, and flocking transitions. To understand the appearance and disappearance of vortices in the many-particle system, we further investigate the dynamics of simple ring structures under the impact of self-propulsion.

arXiv comment14 pages and 12 figures

References in corpus (54)

• Novel type of phase transition in a system of self-driven particles
• Active Particles in Complex and Crowded Environments
• The Mechanics and Statistics of Active Matter
• Motility-Induced Phase Separation
• Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles
• Active Brownian Particles. From Individual to Collective Stochastic Dynamics
• Swimming in circles: Motion of bacteria near solid boundaries
• Meso-scale turbulence in living fluids
• Statistical Mechanics of Interacting Run-and-Tumble Bacteria
• Induced-charge Electrophoresis of Metallo-dielectric Particles
• The 2019 Motile Active Matter Roadmap
• Circular motion of asymmetric self-propelling particles
• Confinement Stabilizes a Bacterial Suspension into a Spiral Vortex
• Active Brownian Motion Tunable by Light
• Phase behaviour of active Brownian particles: The role of dimensionality
• Full phase diagram of active Brownian disks: from melting to motility-induced phase separation
• Activity-induced phase separation and self-assembly in mixtures of active and passive particles
• Dynamics of a Brownian circle swimmer
• Effective Cahn-Hilliard equation for the phase separation of active Brownian particles
• The Rotating Vicsek Model: Pattern Formation and Enhanced Flocking in Chiral Active Matter
• The Physics of the Vicsek Model
• Sorting of Chiral Microswimmers
• Non-Equilibrium Strongly Hyperuniform Fluids of Circle Active Particles with Large Local Density Fluctuations
• Clustering of microswimmers: Interplay of shape and hydrodynamics
• Interrupted Motility Induced Phase Separation in Aligning Active Colloids
• Hydrodynamic suppression of phase separation in active suspensions
• Dynamical mean-field theory and weakly non-linear analysis for the phase separation of active Brownian particles
• Spontaneous aggregation and global polar ordering in squirmer suspensions
• Traveling fronts in active-passive particle mixtures
• Active Curved Polymers form Vortex Patterns on Membranes
• Nonequilibrium dynamics of mixtures of active and passive colloidal particles
• Pattern Formation in Chemically Interacting Active Rotors with Self-Propulsion
• Clustering and phase separation of circle swimmers dispersed in a monolayer
• Velocity alignment promotes motility-induced phase separation
• Diffusion of Chiral Janus Particles in a Sinusoidal Channel
• Clustering and phase behaviour of attractive active particles with hydrodynamics
• Hydrodynamic interactions in dense active suspensions: from polar order to dynamical clusters
• Clustering of Magnetic Swimmers in a Poiseuille Flow
• Dynamical Crystallites of Active Chiral Particles
• Brownian motion of a circle swimmer in a harmonic trap
• Dynamical self-assembly of dipolar active Brownian particles in two dimensions
• Traveling Bands, Clouds, and Vortices of Chiral Active Matter
• Analytical approach to chiral active systems: suppressed phase separation of interacting Brownian circle swimmers
• Lane formation in a system of dipolar microswimmers
• Self-propelled chimeras
• Self-Organized Vortices of Circling Self-Propelled Particles and Curved Active Flagella
• Non-equilibrium condensation and coarsening of field-driven dipolar colloids
• Active particles with polar alignment in ring-shaped confinement
• Hydrodynamic interactions dominate the structure of active swimmers' pair distribution functions
• Particle-scale statistical theory for hydrodynamically induced polar ordering in microswimmer suspensions
• Phase separation of self-propelled ballistic particles
• Phase separation dynamics in a two-dimensional magnetic mixture
• Spinodal decomposition of a binary magnetic fluid confined to a surface
• Dimensionality effects in dipolar fluids

Cited by in corpus (10)

• Chiral active matter in external potentials
• Glassy Dynamics in Chiral Fluids
• Hydrodynamic Synchronisation of Chiral Microswimmers
• Geometry-Induced Dynamics of Confined Chiral Active Matter
• Long-range translational order and hyperuniformity in two-dimensional chiral active crystal
• Chiral active systems near a substrate: Emergent damping length controlled by fluid friction
• Singular density correlations in chiral active fluids in three dimensions
• Thermodynamic nature of irreversibility in active matter
• Circular motion subject to external alignment under active driving: nonlinear dynamics and the circle map
• Chiral Active Matter