Results 191 to 200 of about 4,761,499 (204)

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, Michael M Norton, Alexandra M Tayar   +2 more
exaly   +4 more sources

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Interface-resolved simulations of particles in active nematics

The Physics of Fluids, 2023
An accurate coarse-grained simulation of an active fluid is invaluable as a tool to understand its hydrodynamic behaviors. The study on the dynamics of particles immersed in an active fluid also requires accurate resolution of the fluid–particle ...
N. Phan-Thien
semanticscholar   +1 more source

Behavior of chiral active nematics confined to nanoscopic circular region

The European Physical Journal E : Soft matter, 2021
We performed molecular dynamic simulations of a model active nematic confined to a two-dimensional nanoscopic circular region under both tangential and radial anchoring boundary conditions.
L. V. Mirantsev
semanticscholar   +2 more sources

Twist-Induced Networking and Fast Propagation of Defects in Three-Dimensional Active Nematics.

Physical Review Letters
Owing to the sustained energy input, active nematics can spontaneously generate topological defects, which generally undergo chaotic motions ruled by active hydrodynamics.
Zhong-Yi Li, Anna Dai, Shao-Zhen Lin, Rui Zhang, Bo Li   +4 more
semanticscholar   +1 more source

Optimal Control of Short-Time Attractors in Active Nematics.

Physical Review Letters
Objective Eulerian coherent structures (OECSs) and instantaneous Lyapunov exponents (iLEs) govern short-term material transport in fluid flows as Lagrangian coherent structures and the finite-time Lyapunov exponent do over longer times.
Carlo Sinigaglia, F. Braghin, M. Serra
semanticscholar   +1 more source

Achieving designed texture and flows in bulk active nematics using optimal control theory.

Journal of Chemical Physics
Being intrinsically nonequilibrium, active materials can potentially perform functions that would be thermodynamically forbidden in passive materials.
Saptorshi Ghosh, A. Baskaran, Michael F. Hagan   +2 more
semanticscholar   +1 more source

Nonlinear Spontaneous Flow Instability in Active Nematics.

Physical Review Letters
Active nematics exhibit spontaneous flows through a well-known linear instability of the uniformly aligned quiescent state. Here, we show that even a linearly stable uniform state can experience a nonlinear instability, resulting in a discontinuous ...
Ido Lavi, Ricard Alert, J. Joanny, Jaume Casademunt   +3 more
semanticscholar   +1 more source

Topological defects lead to energy transfer in active nematics

Nature Communications
Active nematics are fluids in which the components have nematic symmetry and are driven out of equilibrium due to the microscopic generation of an active stress.
D. J. Pearce, Berta Mart'inez-Prat, Jordi Ign'es-Mullol, Francesc Sagués   +3 more
semanticscholar   +1 more source

Twist-induced crossover from two-dimensional to three-dimensional turbulence in active nematics

Physical Review E, 2018
While studies of active nematics in two dimensions have shed light on various aspects of the flow regimes and topology of active matter, three-dimensional properties of topological defects and chaotic flows remain unexplored.
Tyler N Shendruk, KRISTIAN Thijssen, J M Yeomans   +2 more
exaly   +1 more source

Active Nematics

2021
openaire   +1 more source