Mesoscopic Turbulence and Local Order in Janus Particles Self-Propelling under an AC Electric Field
arXiv:1506.06591 · doi:10.1103/PhysRevE.92.052309
Abstract
To elucidate mechanisms of mesoscopic turbulence exhibited by active particles, we experimentally study turbulent states of non-living self-propelled particles. We realize an experimental system with dense suspensions of asymmetrical colloidal particles (Janus particles) self-propelling on a two-dimensional surface under an AC electric field. Velocity fields of the Janus particles in the crowded situation can be regarded as a sort of turbulence because it contains many vortices and their velocities change abruptly. Correlation functions of their velocity field reveal the coexistence of polar alignment and anti-parallel alignment interactions, which is considered to trigger mesoscopic turbulence. Probability distributions of local order parameters for polar and nematic orders indicate the formation of local clusters with particles moving in the same direction. A broad peak in the energy spectrum of the velocity field appears at the spatial scales where the polar alignment and the cluster formation are observed. Energy is injected at the particle scale and such conserved quantity as energy could be cascading toward the larger clusters.
12 pages, 13 figures
References in corpus (8)
- Novel type of phase transition in a system of self-driven particles
- The Dynamics of Crowd Disasters: An Empirical Study
- Meso-scale turbulence in living fluids
- Induced-Charge Electro-Osmosis
- Induced-charge Electrophoresis of Metallo-dielectric Particles
- Nonequilibrium equation of state in suspensions of active colloids
- Induced-charge electro-osmosis around metal and Janus spheres in water: Patterns of flow and breaking symmetries
- Pattern formation in active particle systems due to competing alignment interactions
Cited by in corpus (59)
- Active Particles in Complex and Crowded Environments
- Emergent behavior in active colloids
- Active Turbulence
- Statistical Mechanics of Active Ornstein Uhlenbeck Particles
- Distortion and destruction of colloidal flocks in disordered environments
- Long-range nematic order and anomalous fluctuations in suspensions of swimming filamentous bacteria
- Interrupted Motility Induced Phase Separation in Aligning Active Colloids
- Time-(ir)reversibility in active matter: from micro to macro
- Universal scaling of active nematic turbulence
- Flagellar Dynamics of Chains of Active Janus Particles Fueled by an AC electric field
- Optimal run-and-tumble based transportation of a Janus particle with active steering
- Sounds and hydrodynamics of polar active fluids
- Active glass: ergodicity breaking dramatically affects response to self-propulsion
- Derivation of a hydrodynamic theory for mesoscale dynamics in microswimmer suspensions
- Hydrodynamic length-scale selection and effective viscosity in microswimmer suspensions
- Disordered collective motion in dense assemblies of persistent particles
- Characterization and Control of the Run-and-Tumble Dynamics of {\it Escherichia Coli}
- Phase behaviour and dynamical features of a two-dimensional binary mixture of active/passive spherical particles
- Nonmonotonic behavior in the dense assemblies of active colloids
- Lamellar to micellar phases and beyond: when tactic active systems admit free-energy functionals
- Collective entrainment and confinement amplify transport by schooling micro-swimmers
- Emergence of colloidal patterns in AC electrical fields
- Inclusions, Boundaries and Disorder in Scalar Active Matter
- Morphological transitions of active Brownian particle aggregates on porous walls
- Flowing active liquids in a pipe: Hysteretic response of polar flocks to external fields
- Motility-Induced Clustering and Meso-Scale Turbulence in Active Polar Fluids
- Pair correlation of dilute Active Brownian Particles: from low activity dipolar correction to high activity algebraic depletion wings
- Ising-like critical behavior of vortex lattices in an active fluid
- Thermal Transport Dynamics in Active Heat Transfer Fluids (AHTF)
- Anomalous fluctuations in homogeneous fluid phase of active Brownian particles
- Quasi-two-dimensional bacterial swimming around pillars: enhanced trapping efficiency and curvature dependence
- Aggregate morphology of active Brownian particles on porous, circular walls
- Asymmetric pattern formation in microswimmer suspensions induced by orienting fields
- Discovering dynamic laws from observations: the case of self-propelled, interacting colloids
- Scaling regimes of active turbulence with external dissipation
- Electrophoresis of metal-dielectric Janus particles with dipolar director symmetry in nematic liquid crystals
- Friction mediated phase transition in confined active nematics
- Coexistence of defect morphologies in three dimensional active nematics
- Nematic Torques in Scalar Active Matter: when Fluctuations Favor Polar Order and Persistence
- Nonlinear spontaneous flow instability in active nematics
- Active particle in a harmonic trap driven by a resetting noise: an approach via Kesten variables
- Pattern selection and the route to turbulence in incompressible polar active fluids
- Flocking turbulence of microswimmers in confined domains
- Particle-surface interactions in a uniform electric field
- Active colloid with externally induced periodic bipolar motility and its cooperative motion
- Electrohydrodynamic flow about a colloidal particle suspended in a non-polar fluid
- Hermitian and non-Hermitian topology in active matter
- Oscillating edge current in polar active fluid
- Dynamics and rupture of doped Motility Induced Phase Peparation
- Emergence of oscillatory states of self-propelled colloids under optical confinement
- Activity-driven emulsification of phase-separating binary mixtures
- Algebraic correlations and anomalous fluctuations in ordered flocks of Janus particles fueled by an AC electric field
- Orientational order and topological defects in a dilute solutions of rodlike polymers at low Reynolds number
- Sedimentation and structure of squirmer suspensions under gravity
- Learning general pair interactions between self-propelled particles
- Instabilities and turbulence in extensile swimmer suspensions
- Expanding Active Matter to the Third Dimension: Exploring Short and Long-Range Particle-Wall Interactions
- Dynamical arrest in active nematic turbulence
- Effective Temperature and Einstein Relation for Particles in Mesoscale Turbulence