Aspect-ratio-dependent void formation in active rhomboidal and elliptical particle systems
arXiv:2302.00308 · doi:10.1103/PhysRevE.110.024609
Abstract
We execute a numerical simulation on active nematics with particles interacting by an excluded volume effect. The systems with rhomboidal particles and that with elliptical particles are considered in order to investigate the effect of the direct contact of particles. In our simulation, the void regions, where the local number density is almost zero, appear in both systems when the aspect ratio of the particles is high. We focused on the relationship between the void regions and the particle orientation of the bulk. The particle number density, particle orientation, topological defects, and void regions are analyzed for different aspect ratios in both systems. The systems with rhomboidal particles have characteristic void sizes, which increase with an increase in the aspect ratio. In contrast, the distribution of the void-region size in the systems with elliptical particles is broad. The present results suggest that the void size in the systems with rhomboidal particles is determined by the correlation length of the particle orientational field around the void regions, while that might be determined by the system size in the systems with elliptical particles.
9 pages, 9 figures
References in corpus (23)
- Collective motion
- Spontaneous motion in hierarchically assembled active matter
- The 2019 Motile Active Matter Roadmap
- Topological defect launches 3D mound in the active nematic sheet of neural progenitors
- Non-equilibrium clustering of self-propelled rods
- Living Liquid Crystals
- Topological active matter
- Orientational order of motile defects in active nematics
- Minimal model for active nematics: quasi-long-range order and giant fluctuations
- Defect dynamics in active nematics
- Patterning active materials with addressable soft interfaces
- Turbulent dynamics of epithelial cell cultures
- Data-driven quantitative modeling of bacterial active nematics
- Emergent states in dense systems of active rods: from swarming to turbulence
- Cell division: a source of active stress in cellular monolayers
- Emergence of active nematics in bacterial biofilms
- Interplay of Structure, Elasticity and Dynamics in Actin-Based Nematic Materials
- A particle-field representation unifies paradigms in active matter
- Active nematics are intrinsically phase-separated
- Statistical Properties of Autonomous Flows in 2D Active Nematics
- Mesoscale pattern formation of self-propelled rods with velocity reversal
- Wrinkling instability in 3D active nematics
- Active nematics with anisotropic friction: the decisive role of the flow aligning parameter