Results 31 to 40 of about 2,992 (173)
Biphasic, Lyotropic, Active Nematics [PDF]
Physical Review Letters, 2014 7 pages, 8 ...
Matthew L. Blow +2 more
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Active nematics with deformable particles
Soft Matter, 2023 We extend theories of active nematics to incorporate cell shape changes. Sufficiently active systems display regions of active, elongated cells coexisting with regions of passive, circular cells.
Hadjifrangiskou, I +2 more
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Optimal Control of Active Nematics [PDF]
Physical Review Letters, 2020 In this work we present the first systematic framework to sculpt active nematics systems, using optimal control theory and a hydrodynamic model of active nematics. We demonstrate the use of two different control fields, (1) applied vorticity and (2) activity strength, to shape the dynamics of an extensile active nematic that is confined to a disk.
Michael M. Norton +3 more
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Interplay of Active Stress and Driven Flow in Self-Assembled, Tumbling Active Nematics
Crystals, 2021 Lyotropic chromonic liquid crystals (LCLCs) are a special type of hierarchical material in which self-assembled molecular aggregates are responsible for the formation of liquid crystal phases.
Weiqiang Wang, Rui Zhang
doaj +1 more source
Helical flow states in active nematics [PDF]
Physical Review E, 2022 4 pages, 4 figures ...
Keogh, Ryan R. +6 more
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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 pattern formation in active nematics.
Saghatchi, Roozbeh +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
doaj +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
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Three-dimensional active defect loops [PDF]
, 2020 We describe the flows and morphological dynamics of topological defect lines and loops in three-dimensional active nematics and show, using theory and numerical modeling, that they are governed by the local profile of the orientational order surrounding ...
Alexander, Gareth P. +4 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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