Results 1 to 10 of about 2,918 (152)
Theory of nematic and polar active fluid surfaces
Physical Review Research, 2022 We derive a fully covariant theory of the hydrodynamics of nematic and polar active surfaces, subjected to internal and external forces and torques. We study the symmetries of polar and nematic surfaces and find that in addition to five different types ...
Guillaume Salbreux +3 more
doaj +2 more sources
Dynamic structure of active nematic shells [PDF]
Nature Communications, 2016 In active matter, chemical energy is transformed into mechanical motion; theoretical descriptions of nematic liquids are useful in understanding such phenomena. Here, Zhang et al.
Rui Zhang +3 more
doaj +2 more sources
Active nematic multipoles: Flow responses and the dynamics of defects and colloids
Frontiers in Physics, 2023 We introduce a general description of localised distortions in active nematics using the framework of active nematic multipoles. We give the Stokesian flows for arbitrary multipoles in terms of differentiation of a fundamental flow response and describe ...
Alexander J. H. Houston +3 more
doaj +3 more sources
Using Curved Fluid Boundaries to Confine Active Nematic Flows
Frontiers in Physics, 2022 Actively driven, bundled microtubule networks, powered by molecular motors have become a useful framework in which to study the dynamics of energy-driven defects, but achieving control of defect motions is still a challenging problem.
Dimitrius A. Khaladj, Linda S. Hirst
doaj +3 more sources
Discontinuous transition to active nematic turbulence [PDF]
Nature CommunicationsActive fluids exhibit chaotic flows at low Reynolds number known as active turbulence. Whereas the statistical properties of the chaotic flows are increasingly well understood, the nature of the transition from laminar to turbulent flows as activity ...
Malcolm Hillebrand, Ricard Alert
doaj +2 more sources
Order-disorder transition in active nematic: A lattice model study [PDF]
Scientific Reports, 2017 We introduce a lattice model for active nematic composed of self-propelled apolar particles, study its different ordering states in the density-temperature parameter space, and compare with the corresponding equilibrium model.
Rakesh Das +2 more
doaj +2 more sources
Theory of active self-organization of dense nematic structures in the actin cytoskeleton [PDF]
eLifeThe actin cytoskeleton is remarkably adaptable and multifunctional. It often organizes into nematic bundles such as contractile rings or stress fibers. However, how a uniform and isotropic actin gel self-organizes into dense nematic bundles is not fully ...
Waleed Mirza +5 more
doaj +2 more sources
Topological defects lead to energy transfer in active nematics [PDF]
Nature CommunicationsActive 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.
Daniel J. G. Pearce +3 more
doaj +2 more sources
Dynamics of Ring Disclinations Driven by Active Nematic Shells
Frontiers in Physics, 2019 When dispersed in thermotropic nematic liquid crystal oils, surfactant-ladden aqueous droplets often lead to the formation of a equatorial ring disclination in the nearby nematic matrix as a result of a balance between elasticity and interfacial energy ...
Jérôme Hardoüin +8 more
doaj +3 more sources
Submersed micropatterned structures control active nematic flow, topology, and concentration [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2021 T N Shendruk +2 more
exaly +2 more sources