Results 61 to 70 of about 4,761,499 (204)
Machine learning forecasting of active nematics [PDF]
Soft Matter, 2021 Our model is unrolled to map an input orientation sequence (from time t-8 to t-1) to an output one (t,t + 1…) with trajectray tracing. Cyan labels are −1/2 defect while purple ones are +1/2.
Zhengyang Zhou +8 more
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Hierarchical defect-induced condensation in active nematics. [PDF]
Soft Matter, 2023 Topological defects play a central role in the formation and organization of various biological systems. Historically, such nonequilibrium defects have been mainly studied in the context of homogeneous active nematics.
T. Kruger, Ivan Maryshev, Erwin Frey
semanticscholar +1 more source
Active nematics with quenched disorder [PDF]
Physical Review E, 2020 We introduce a two-dimensional active nematic with quenched disorder. We write the coarse-grained hydrodynamic equations of motion for slow variables, viz. density, and orientation. Disorder strength is tuned from zero to large values. Results from the numerical solution of equations of motion as well as the calculation of two-point orientation ...
Sameer Kumar, Shradha Mishra
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Proc Natl Acad Sci U S AMicrofluidics involves the manipulation of flows at the microscale, typically requiring external power sources to generate pressure gradients. Alternatively, harnessing flows from active fluids, which are usually chaotic, has been proposed as a paradigm for the development of micromachines.
Vélez-Cerón I +6 more
europepmc +5 more sources
Vortex Lattices in Active Nematics with Periodic Obstacle Arrays. [PDF]
Physical Review Letters, 2023 We numerically model a two-dimensional active nematic confined by a periodic array of fixed obstacles. Even in the passive nematic, the appearance of topological defects is unavoidable due to planar anchoring by the obstacle surfaces.
C. Schimming +2 more
semanticscholar +1 more source
Viscoelastic confinement induces periodic flow reversals in active nematics. [PDF]
Physical Review E, 2023 We use linear stability analysis and hybrid lattice Boltzmann simulations to study the dynamical behavior of an active nematic confined in a channel made of viscoelastic material.
Francesco Mori +3 more
semanticscholar +1 more source
Coexistence of Defect Morphologies in Three-Dimensional Active Nematics. [PDF]
Physical Review Letters, 2023 We establish how active stress globally affects the morphology of disclination lines of a three-dimensional active nematic liquid crystal under chaotic flow.
P. Digregorio +3 more
semanticscholar +1 more source
The role of fluid flow in the dynamics of active nematic defects
New Journal of Physics, 2021 We adapt the Halperin–Mazenko formalism to analyze two-dimensional active nematics coupled to a generic fluid flow. The governing hydrodynamic equations lead to evolution laws for nematic topological defects and their corresponding density fields.
Luiza Angheluta +3 more
doaj +1 more source
Dispersion of activity at an active–passive nematic interface
Soft Matter, 2022 Efficient nutrient mixing is crucial for the survival of bacterial colonies and other living systems known as active nematics.
Rodrigo C. V. Coelho +2 more
openaire +3 more sources
Binding self-propelled topological defects in active turbulence
Physical Review Research, 2020 We report on the emergence of stable self-propelled bound defects in monolayers of active nematics, which form virtual full-integer topological defects in the form of vortices and asters.
Kristian Thijssen, Amin Doostmohammadi
doaj +1 more source