Hydrodynamics of Topological Defects in Nematic Liquid Crystals
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TLDR
It is shown that backflow, the coupling between the order parameter and the velocity fields, has a significant effect on the motion of defects in nematic liquid crystals.Abstract:
We show that backflow, the coupling between the order parameter and the velocity fields, has a significant effect on the motion of defects in nematic liquid crystals. In particular, the defect speed can depend strongly on the topological strength in two dimensions and on the sense of rotation of the director about the core in three dimensions.read more
Citations
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Topological defects in confined populations of spindle-shaped cells
TL;DR: It is shown that these active cellular nematics operate in a regime in which activity is effectively damped by friction, and that the interaction between defects is controlled by the system’s elastic nematic energy.
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Computer simulation of liquid crystals
TL;DR: A review of molecular and mesoscopic computer simulations of liquid crystalline systems is presented in this paper, where the key findings for bulk phase behaviour are reported and a discussion of possible areas for future development in this field is discussed.
Journal ArticleDOI
Defect dynamics in active nematics
TL;DR: A detailed analytical and numerical study of the mechanics of topological defects in active nematic liquid crystals is presented, showing how these defects dictate the global structure of the director, but also act as local sources of motion, behaving as self-propelled particles.
Journal ArticleDOI
Defect-mediated morphologies in growing cell colonies
TL;DR: It is shown that shape changes during the growth can be regulated by the dynamics of topological defects in the orientation of cells, and that the cells predominantly reorient parallel to the interface due to division-induced active stresses.
Journal ArticleDOI
Topological structure dynamics revealing collective evolution in active nematics
Xia-qing Shi,Yu-qiang Ma +1 more
TL;DR: It is revealed, through a simple model for active nematics using self-driven hard elliptic rods, that the excitation, annihilation and transportation of topological defects differ markedly from those in non-active media.
References
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Book
The physics of liquid crystals
P. G. de Gennes,Richard Alben +1 more
TL;DR: In this paper, the authors define an order parameter statistical theories of the nematic order phenomonological description of the nematic-isotopic mixtures and describe the properties of these mixtures.