A 2-D suspension of active agents: the role of fluid mediated interactions
arXiv:1607.05665 · doi:10.1088/1361-648X/aa5a64
Abstract
Taking into account simultaneously the Vicsek short range ordering and also the far-field hydrodynamic interactions mediated by the ambient fluid, we investigate the role of long range interactions in the ordering phenomena in a quasi 2-dimensional active suspension. By studying the number fluctuations, the velocity correlation functions and cluster size distribution function, we observe that depending on the number density of swimmers and the strength of noise, the hydrodynamic interactions affect the ordering in a suspension. For a fixed value of noise, at large density of particles, long range interactions enhance the clustering in the system.
arXiv comment7 pages, 5 figures
References in corpus (18)
- Novel type of phase transition in a system of self-driven particles
- Meso-scale turbulence in living fluids
- Hydrodynamic fluctuations and instabilities in ordered suspensions of self-propelled particles
- Onset of collective and cohesive motion
- Fluid dynamics and noise in bacterial cell-cell and cell-surface scattering
- Collective motion of self-propelled particles interacting without cohesion
- Non-equilibrium clustering of self-propelled rods
- Hydrodynamics determines collective motion and phase behavior of active colloids
- Active nematics on a substrate: giant number fluctuations and long-time tails
- Diffusion and spatial correlations in suspensions of swimming particles
- A basic swimmer at low Reynolds number
- Hydrodynamic suppression of phase separation in active suspensions
- Macroscopic equations for pattern formation in mixtures of microtubules and motors
- The collective dynamics of self-propelled particles
- Dynamic Clustering in Suspension of Motile Bacteria
- Interaction between catalytic micro motors
- Rheological properties of a dilute suspension of self-propelled particles
- Coherent Hydrodynamic Coupling for Stochastic Swimmers