Results 41 to 50 of about 2,992 (173)
Colloids in two-dimensional active nematics: conformal cogs and controllable spontaneous rotation
New Journal of Physics, 2023 A major challenge in the study of active systems is to harness their non-equilibrium dynamics into useful work. We address this by showing how to design colloids with controllable spontaneous propulsion or rotation when immersed in active nematics.
Alexander J H Houston +1 more
doaj +1 more source
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
openaire +3 more sources
Active Nematic Flows over Curved Surfaces
Physical Review Letters, 2022 5 pages, 3 figures, 20 supplemental pages, 11 supplemental figures, 2 supplemental ...
Samuel Bell +3 more
openaire +4 more sources
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
doaj +1 more source
Active nematics on a substrate: giant number fluctuations and long-time tails [PDF]
, 2002 We construct the equations of motion for the coupled dynamics of order parameter and concentration for the nematic phase of driven particles on a solid surface, and show that they imply (i) giant number fluctuations, with a standard deviation ...
+18 more
core +2 more sources
Active Nematic Defects and Epithelial Morphogenesis
Physical Review Letters, 2022 Inspired by recent experiments that highlight the role of nematic defects in the morphogenesis of epithelial tissues, we develop a minimal framework to study the dynamics of an active curved surface driven by its nematic texture. Allowing the surface to evolve via relaxational dynamics leads to a theory linking nematic defect dynamics, cellular ...
Farzan Vafa, L. Mahadevan
openaire +3 more sources
Multiscale Microtubule Dynamics in Active Nematics [PDF]
Physical Review Letters, 2021 In microtubule-based active nematics, motor-driven extensile motion of microtubule bundles powers chaotic large-scale dynamics. We quantify the interfilament sliding motion both in isolated bundles and in a dense active nematic. The extension speed of an isolated microtubule pair is comparable to the molecular motor stepping speed. In contrast, the net
Linnea M. Lemma +7 more
openaire +3 more sources
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
doaj +1 more source
The geometry of thresholdless active flow in nematic microfluidics [PDF]
, 2017 "Active nematics" are orientationally ordered but apolar fluids composed of interacting constituents individually powered by an internal source of energy.
Green, Richard +2 more
core +3 more sources
Defect self-propulsion in active nematic films with spatially varying activity
Royal Society Open Science, 2023 We study the dynamics of topological defects in active nematic films with spatially varying activity and consider two set-ups: (i) a constant activity gradient and (ii) a sharp jump in activity.
Jonas Rønning +2 more
doaj +1 more source