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Polymers
Hydrodynamic flows in microsized liquid crystal cells with orientational defects
A. V. Zakharov Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, St. Petersburg
Abstract:
The effect of the orientational defect (OD) on the formation process of a vortical flow $\mathbf{v}(t,\mathbf{r})$, emerging in a microsized liquid crystal (LC) cell under the action of a focused laser radiation, was studied within the nonlinear generalization of the classical Ericksen–Leslie theory by numerical methods, considering the thermomechanical contributions to both the stress tensor and viscous torque, that acts on the unit volume of the liquid crystal phase (LC phase). The analysis of the obtained results showed that the vortical flow, rotating clockwise, is generated in a “defect” LC cell close to the OD, with the OD, placed on the lower bounding surface, on which the laser radiation was focused. The rotational velocity of this flow is two orders of magnitude greater than the rotational velocity of the vortex, which is generated in a “pure” LC cell at the same conditions and rotates anticlockwise.
Received: 14.03.2018 Revised: 26.03.2018
Citation:
A. V. Zakharov, “Hydrodynamic flows in microsized liquid crystal cells with orientational defects”, Fizika Tverdogo Tela, 60:9 (2018), 1834–1840; Phys. Solid State, 60:9 (2018), 1884–1890
Linking options:
https://www.mathnet.ru/eng/ftt9093 https://www.mathnet.ru/eng/ftt/v60/i9/p1834
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Abstract page: | 32 | Full-text PDF : | 10 |
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