Results 31 to 40 of about 12,892 (173)
Defect dynamics in active nematics [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2014 Topological defects are distinctive signatures of liquid crystals. They profoundly affect the viscoelastic behaviour of the fluid by constraining the orientational structure in a way that inevitably requires global changes not achievable with any set of local deformations.
Giomi, Luca +4 more
openaire +4 more sources
Wrinkling Instability in 3D Active Nematics [PDF]
Nano Letters, 2020 In nature interactions between biopolymers and motor proteins give rise to biologically essential emergent behaviours. Besides cytoskeleton mechanics, active nematics arise from such interactions. Here we present a study on 3D active nematics made of microtubules, kinesin motors and depleting agent. It shows a rich behaviour evolving from a nematically
Tobias Strübing +5 more
openaire +7 more sources
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
doaj +1 more source
Active turbulence in active nematics [PDF]
The European Physical Journal Special Topics, 2016 Dense, active systems show active turbulence, a state characterised by flow fields that are chaotic, with continually changing velocity jets and swirls. Here we review our current understanding of active turbulence. The development is primarily based on the theory and simulations of active liquid crystals, but with accompanying summaries of related ...
S.P. Thampi, J.M. Yeomans
openaire +2 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
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
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
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
Large-scale collective properties of self-propelled rods [PDF]
, 2009 We study, in two space dimensions, the large-scale properties of collections of constant-speed polar point particles interacting locally by nematic alignment in the presence of noise.
Baer, M. +3 more
core +4 more sources