Dynamical swirl structures powered by microswimmers in active nematics [PDF]
Physica A: Statistical Mechanics and Its ApplicationsActive nematics, in their pure form, have demonstrated a plethora of dynamic and steady state behaviors, including large-scale dynamic structures, collective flows, and intricate multi-spatial temporal dynamics.
Pawan Kumar Mishra +2 more
exaly +2 more sources
Onset of meso-scale turbulence in active nematics [PDF]
Nature Communications, 2017 Bacteria continuously inject energy into their surroundings and thus induce chaotic like flows, namely meso-scale turbulence. Here, the authors show that transition to meso-scale turbulence and inertial turbulence observed in pipes share the same scaling
Amin Doostmohammadi +3 more
doaj +2 more sources
Nematic order condensation and topological defects in inertial active nematics. [PDF]
Physical Review E, 2022 Living materials at different length scales manifest active nematic features such as orientational order, nematic topological defects, and active nematic turbulence. Using numerical simulations we investigate the impact of fluid inertia on the collective
R. Saghatchi +2 more
semanticscholar +6 more sources
Curvature controlled defect dynamics in topological active nematics [PDF]
Scientific Reports, 2017 We study the spatiotemporal patterns that emerge when an active nematic film is topologically constraint. These topological constraints allow to control the non-equilibrium dynamics of the active system.
Francesco Alaimo +2 more
doaj +2 more sources
From disks to channels: dynamics of active nematics confined to an annulus. [PDF]
Soft Matter, 2023 Confinement can be used to systematically tame turbulent dynamics occurring in active fluids. Although periodic channels are the simplest geometries to study confinement numerically, the corresponding experimental realizations require closed racetracks ...
Chaitanya Joshi +5 more
semanticscholar +3 more sources
Energetic Variational Modeling of Active Nematics: Coupling the Toner–Tu Model with ATP Hydrolysis [PDF]
EntropyWe present a thermodynamically consistent energetic variational model for active nematics driven by ATP hydrolysis. Extending the classical Toner–Tu framework, we introduce a chemo-mechanical coupling mechanism in which the self-advection and ...
Yiwei Wang
doaj +2 more sources
Activity gradients in two- and three-dimensional active nematics. [PDF]
Soft Matter, 2022 We numerically investigate how spatial variations of extensile or contractile active stress affect bulk active nematic systems in two and three dimensions.
Liam J. Ruske, J. Yeomans
semanticscholar +4 more sources
Active Nematics Reinforce the Ratchet Flow in Dense Environments Without Jamming [PDF]
Advanced ScienceThe past decade witnessed a surge in discoveries where biological systems, such as bacteria or living cells, inherently portray active polar or nematic behavior: they prefer to align with each other and form local order during migration.
Yisong Yao +5 more
doaj +2 more sources
Defect loops in three-dimensional active nematics as active multipoles. [PDF]
Physical Review E, 2021 We develop a description of defect loops in three-dimensional active nematics based on a multipole expansion of the far-field director and show how this leads to a self-dynamics dependent on the loop's geometric type.
A. Houston, G. P. Alexander
semanticscholar +3 more sources
Integer topological defects offer a methodology to quantify and classify active cell monolayers [PDF]
Nature CommunicationsMonolayers of confluent elongated cells are frequently considered active nematics, featuring $$\pm \frac{1}{2}$$ ± 1 2 topological defects. In extensile systems, where cells extend further along their long axis, they can accumulate at $$+\frac{1}{2 ...
Zihui Zhao +7 more
doaj +2 more sources