Defect self-propulsion in active nematic films with spatially varying activity
Sign Up to like & getrecommendations! Published in 2022 at "Royal Society Open Science"
DOI: 10.1098/rsos.221229
Abstract: We study the dynamics of topological defects in active nematic films with spatially varying activity and consider two set-ups: (i) a constant activity gradient and (ii) a sharp jump in activity. A constant gradient of… read more here.
Keywords: nematic films; films spatially; activity; self propulsion ... See more keywords
Vector formalism for active nematic liquid crystals in two dimensions.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.106.034701
Abstract: Specific features of two-dimensional nematodynamics give rise to shortfalls of the tensor representation of the nematic order parameter commonly used in computations, especially in theory of active matter. The alternative representation in terms of the… read more here.
Keywords: vector formalism; nematic liquid; liquid crystals; formalism active ... See more keywords
Active nematic gel with quenched disorder.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.106.044603
Abstract: With quenched disorder, we introduce two-dimensional active nematics suspended in an incompressible fluid. We write the coarse-grained hydrodynamic equations of motion for slow variables, viz. density, orientation, and flow fields. The quenched disorder is introduced such… read more here.
Keywords: nematic gel; quenched disorder; gel quenched; orientation ... See more keywords
Emergence of Active Nematic Behavior in Monolayers of Isotropic Cells.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.122.048004
Abstract: There is now growing evidence of the emergence and biological functionality of liquid crystal features, including nematic order and topological defects, in cellular tissues. However, how such features that intrinsically rely on particle elongation emerge… read more here.
Keywords: behavior monolayers; topological defects; nematic behavior; cell ... See more keywords
Darcy's Law without Friction in Active Nematic Rheology.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.124.187801
Abstract: We study the dynamics of a contractile active nematic fluid subjected to a Poiseuille flow. In a quasi-1D geometry, we find that the linear rheology of this material is reminiscent of Darcy's law in complex… read more here.
Keywords: active nematic; rheology; law without; darcy law ... See more keywords
Active Nematic Flows over Curved Surfaces.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.118001
Abstract: Cell monolayers are a central model system in the study of tissue biophysics. In vivo, epithelial tissues are curved on the scale of microns, and the curvature's role in the onset of spontaneous tissue flows… read more here.
Keywords: active nematic; curved surfaces; flows curved; nematic flows ... See more keywords
Data-Driven Discovery of Active Nematic Hydrodynamics.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.258001
Abstract: Active nematics can be modeled using phenomenological continuum theories that account for the dynamics of the nematic director and fluid velocity through partial differential equations (PDEs). While these models provide a statistical description of the… read more here.
Keywords: hydrodynamics; discovery active; data driven; active nematic ... See more keywords
Active nematic emulsions
Sign Up to like & getrecommendations! Published in 2018 at "Science Advances"
DOI: 10.1126/sciadv.aao1470
Abstract: Droplets of active fluid form a dynamically self-assembled material based on the cross-talk between active and passive defects. The formation of emulsions from multiple immiscible fluids is governed by classical concepts such as surface tension,… read more here.
Keywords: nematic emulsions; active nematic; active passive;