Results 41 to 50 of about 3,142,115 (200)
Defect order in active nematics on a curved surface
New Journal of Physics, 2020 We investigate the effects of extrinsic curvature on the turbulent behavior of a 2D active nematic confined to the surface of a cylinder. The surface of a cylinder has no intrinsic curvature and only extrinsic curvature.
D J G Pearce
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Quadrupolar active stress induces exotic phases of defect motion in active nematics [PDF]
, 2021 A wide range of living and artificial active matter exists in close contact with substrates and under strong confinement, where in addition to dipolar active stresses, quadrupolar active stresses can become important. Here, we numerically investigate the
Nejad, Mehrana R. +2 more
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Machine learning active-nematic hydrodynamics [PDF]
Proceedings of the National Academy of Sciences, 2021 Hydrodynamic theories effectively describe many-body systems out of equilibrium in terms of a few macroscopic parameters. However, such parameters are difficult to determine from microscopic information. Seldom is this challenge more apparent than in active matter, where the hydrodynamic parameters are in fact fields that encode the distribution of ...
Jonathan Colen +12 more
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Hydrodynamic Effects in Oscillatory Active Nematics [PDF]
, 2017 Oscillatory active nematics represent nonequilibrium suspensions of microscopic objects, such as natural or artificial molecular machines, that cyclically change their shapes and thus operate as oscillating force dipoles.
Yuki Koyano +5 more
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Passive Janus particles are self-propelled in active nematics
New Journal of Physics, 2022 While active systems possess notable potential to form the foundation of new classes of autonomous materials (Zhang et al 2021 Nat. Rev. Mater. 6 437), designing systems that can extract functional work from active surroundings has proven challenging. In
Benjamin Loewe, Tyler N Shendruk
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Excitable Patterns in Active Nematics
Physical Review Letters, 2011 We analyze a model of mutually-propelled filaments suspended in a two-dimensional solvent. The system undergoes a mean-field isotropic-nematic transition for large enough filament concentrations and the nematic order parameter is allowed to vary in space and time.
Giomi, Luca +3 more
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Topology and dynamics of active nematic vesicles [PDF]
Science, 2014 Liquid crystals on a deformable substrate The orientation of the molecules in a liquid crystalline material will change in response to either changes in the substrate or an external field. This is the basis for liquid crystalline devices. Vesicles, which are fluid pockets surrounded by lipid bilayers, will change size or shape in
Keber, F. +8 more
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Active nematic–isotropic interfaces in channels [PDF]
Soft Matter, 2019 The hydrodynamic behavior of the interface between nematic (N) and isotropic (I) phases of a confined active liquid crystal is investigated using numerical simulations.
Rodrigo C. V. Coelho +2 more
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A Machine Learning Approach to Robustly Determine Director Fields and Analyze Defects in Active Nematics [PDF]
, 2023 Active nematics are dense systems of rodlike particles that consume energy to drive motion at the level of the individual particles. They exist in natural systems like biological tissues and artificial materials such as suspensions of self-propelled ...
Wang, Yifei +7 more
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Active Nematics Are Intrinsically Phase Separated [PDF]
Physical Review Letters, 2006 Two-dimensional nonequilibrium nematic steady states, as found in agitated granular-rod monolayers or films of orientable amoeboid cells, were predicted [Europhys. Lett. {\bf 62} (2003) 196] to have giant number fluctuations, with standard deviation proportional to the mean.
Mishra, Shradha, Ramaswamy, Sriram
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