Results 31 to 40 of about 3,142,115 (200)
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
Zhengyang Zhou +8 more
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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
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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
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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
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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
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
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Biphasic, Lyotropic, Active Nematics [PDF]
Physical Review Letters, 2014 7 pages, 8 ...
Matthew L. Blow +2 more
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Nematic order condensation and topological defects in inertial active nematics
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 pattern formation in active nematics.
Saghatchi, Roozbeh +2 more
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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
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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
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