Role of friction in multidefect ordering

Abstract

We use continuum simulations to study the impact of friction on the ordering of defects in an active nematic. Even in a frictionless system, +1/2 defects tend to align side-by-side and orient antiparallel reflecting their propensity to form, and circulate with, flow vortices. Increasing friction enhances the effectiveness of the defect-defect interactions, and defects form dynamically evolving, large scale, positionally and orientationally-ordered structures which can be explained as a competition between hexagonal packing, preferred by the -1/2 defects, and rectangular packing preferred by the +1/2 defects.

References in corpus (32)

• The Mechanics and Statistics of Active Matter
• Spontaneous motion in hierarchically assembled active matter
• Meso-scale turbulence in living fluids
• Hydrodynamic fluctuations and instabilities in ordered suspensions of self-propelled particles
• Long-lived Giant Number Fluctuations in a Swarming Granular Nematic
• Fluid dynamics of bacterial turbulence
• Pressure is not a state function for generic active fluids
• Topological defect launches 3D mound in the active nematic sheet of neural progenitors
• Defect annihilation and proliferation in active nematics
• Orientational order of motile defects in active nematics
• Steady-state hydrodynamic instabilities of active liquid crystals: Hybrid lattice Boltzmann simulations
• Defect dynamics in active nematics
• Velocity Correlations in an Active Nematic
• Patterning active materials with addressable soft interfaces
• Stabilization of active matter by flow-vortex lattices and defect ordering
• Tunable structure and dynamics of active liquid crystals
• Defect-mediated morphologies in growing cell colonies
• Onset of meso-scale turbulence in living fluids
• Data-driven quantitative modeling of bacterial active nematics
• Clustering and pattern formation in chemorepulsive active colloids
• Vorticity, Defects and Correlations in Active Turbulence
• Defect unbinding in active nematics
• Correlation lengths in hydrodynamic models of active nematics
• Orientation of topological defects in 2D nematic liquid crystals
• Orientational properties of nematic disclinations
• Lattice Boltzmann Methods and Active Fluids
• Hydrodynamics of Active Defects: from order to chaos to defect ordering
• Negative stiffness and modulated states in active nematics
• Antipolar ordering of topological defects in active liquid crystals
• Multi-scale statistics of turbulence motorized by active matter
• Understanding dense active nematics from microscopic models
• Spatiotemporal Self-Organization of Fluctuating Bacterial Colonies

Cited by in corpus (19)

• Topological active matter
• Active Turbulence
• Submersed Micropatterned Structures Control Active Nematic Flow, Topology and Concentration
• The role of fluid flow in the dynamics of active nematic defects
• Spontaneous Self-Constraint in Active Nematic Flows
• Active extensile stress promotes 3D director orientations and flows
• Orientational correlations in active and passive nematic defects
• Spontaneous rotation of active droplets in two and three dimensions
• Collective rotational motion of freely-expanding T84 epithelial cell colonies
• Flow around topological defects in active nematic films
• Two-temperature activity induces liquid-crystal phases inaccessible in equilibrium
• Fluctuation-induced dynamics of nematic topological defects
• Vorticity phase separation and defect lattices in the isotropic phase of active liquid crystals
• Friction mediated phase transition in confined active nematics
• Many-defect solutions in planar nematics: interactions, spiral textures and boundary conditions
• Pattern selection and the route to turbulence in incompressible polar active fluids
• Quadrupolar active stress induces exotic phases of defect motion in active nematics
• Turbulence to order transitions in activity patterned active nematics
• Spontaneous flow created by active topological defects