Results 81 to 90 of about 3,056 (193)
Physical Review Research, 2021 Understanding the emergent nonequilibrium dynamics of collective units is crucial for steering and engineering active many-body systems. Here, we explore flow transitions and topological defect dynamics of channel-confined active nematics under chiral ...
Zhong-Yi Li, De-Qing Zhang, Bo Li
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Role of friction in multidefect ordering
, 2020 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 ...
Nejad, Mehrana R. +2 more
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Boltzmann-Ginzburg-Landau approach for continuous descriptions of generic Vicsek-like models [PDF]
, 2014 We describe a generic theoretical framework, denoted as the Boltzmann-Ginzburg-Landau approach, to derive continuous equations for the polar and/or nematic order parameters describing the large scale behavior of assemblies of point-like active particles ...
Bertin, Eric +3 more
core +4 more sources
Advanced Materials, EarlyView.Associating a red‐NIR phosphorescent octahedral hexanuclear molybdenum cluster compound with hexaethyleneoxide chains bearing mesogenic units on both ends leads to an emissive hybrid liquid crystal showing mesomorphism on a very unusual temperature range down to −25°C.
Killiann Heinz +11 more
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Active forces modulate collective behaviour and cellular organization
Comptes Rendus Biologies, 2021 Biological tissues are composed of various cell types working cooperatively to perform their respective function within organs and the whole body.
Balasubramaniam, Lakshmi +2 more
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Topological Point Defects in SmC* Liquid Crystals Under Mechanical Disturbance
Advanced Materials Interfaces, EarlyView.Tangetial air jet shear inducess island formation and nucleates topological point defects in uniform SmC films. Island bounded by edge dislocation loops shrink and transform into isolated point defects under continued shear. Mechanical perturbatio provides a controllable route for defect engineering in smectric liquid crystal thin films.
Gunganist Kongklad +3 more
wiley +1 more source
Active nematic gel with quenched disorder
Physical Review E, 2022 With quenched disorder, we introduce two-dimensional active nematics suspended in an incompressible fluid. We write the coarse-grained hydrodynamic equations of motion for slow variables, viz. density, orientation and flow fields. The quenched disorder is introduced such that it interacts with the local orientation at every point with some strength ...
Sameer Kumar, Shradha Mishra
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Dancing disclinations in confined active nematics [PDF]
Soft Matter, 2017 The spontaneous emergence of collective flows is a generic property of active fluids and often leads to chaotic flow patterns characterised by swirls, jets, and topological disclinations in their orientation field. However, the ability to achieve structured flows and ordered disclinations is of particular importance in the design and control of active ...
Tyler N. Shendruk +3 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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Dynamic Current Routing in Conductive Liquid Crystal Elastomers for Complex Deformation Actuators
Advanced Materials Technologies, EarlyView.This work introduces a novel actuation control strategy in which electrical stimulation generates localized Joule heating in conductive liquid crystal elastomer (LCE) surfaces, enabling complex 3D deformations from a single homogeneous surface without preprogramming.
Gloria PouWai Lei +2 more
wiley +1 more source