Results 91 to 100 of about 2,992 (173)
Modeling active nematics via the nematic locking principle
Soft MatterWe model microtubule-based active nematics based on the foundational idea that an initial curve following the director field must continue to follow the director field as it evolves. The resulting model shows improved agreement with experiment.
Kevin A. Mitchell +4 more
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Spatial Structures and Giant Number Fluctuations in Models of Active Matter
, 2012 The large scale fluctuations of the ordered state in active matter systems are usually characterised by studying the "giant number fluctuations" of particles in any finite volume, as compared to the expectations from the central limit theorem.
Dibyendu Das +3 more
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Confined Active Nematic Flow in Cylindrical Capillaries [PDF]
Physical Review Letters, 2013 We use numerical modelling to study the flow patterns of an active nematic confined in a cylindrical capillary, considering both planar and homeotropic boundary conditions. We find that active flow emerges not only along the capillary axis but also within the plane of the capillary, where radial vortices are formed.
Miha Ravnik, Julia Yeomans
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Fingering instability of active nematic droplets
Journal of Physics A: Mathematical and Theoretical, 2022 Abstract From the mitotic spindle up to tissues and biofilms, many biological systems behave as active droplets, which often break symmetry and change shape spontaneously. Here, I show that active nematic droplets can experience a fingering instability.
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Curvature-driven stability of defects in nematic textures over spherical disks
, 2017 Stabilizing defects in liquid-crystal systems is crucial for many physical processes and applications ranging from functionalizing liquid-crystal textures to recently reported command of chaotic behaviors of active matters.
Duan, Xiuqing, Yao, Zhenwei
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Dynamics of Ring Disclinations Driven by Active Nematic Shells
Frontiers in Physics, 2019 When dispersed in thermotropic nematic liquid crystal oils, surfactant-ladden aqueous droplets often lead to the formation of a equatorial ring disclination in the nearby nematic matrix as a result of a balance between elasticity and interfacial energy ...
Jérôme Hardoüin +8 more
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Bulk rheology and microrheology of active fluids
, 2012 We simulate macroscopic shear experiments in active nematics and compare them with microrheology simulations where a spherical probe particle is dragged through an active fluid.
Cates, M. E. +5 more
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A Dynamic Renormalization Group Study of Active Nematics
, 2009 We carry out a systematic construction of the coarse-grained dynamical equation of motion for the orientational order parameter for a two-dimensional active nematic, that is a nonequilibrium steady state with uniaxial, apolar orientational order.
Barabási A L +11 more
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The self-organized structure of glioma oncostreams and the disruptive role of passive cells
Scientific ReportsOncostreams are self-organized structures formed by spindle-like, elongated, self-propelled cells recently described in glioblastomas and especially in gliosarcomas.
Lucas Barberis +3 more
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Kinetic Theory of Self-Propelled Particles with Nematic Alignment
EntropyWe present the results from kinetic theory for a system of self-propelled particles with alignment interactions of higher-order symmetry, particularly nematic ones. To this end, we use the Landau equation approach, a systematic approximation to the BBGKY
Horst-Holger Boltz +2 more
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