Jump-Like Light-Induced Hydrodynamic Reorientation of LC's Caused by Direct Volume Expansion

The dynamics of the direct volume expansion mechanism of light induced hydrodynamic motions in homeotropic and hybrid oriented NLC have been studied theoretically. In case of homeotropic initial orientation of NLC molecules the velocity gradient induces a curvature of director. In the case of hybrid...

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Bibliographic Details
Published in:Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003) Pa. : 2003), 2006-09, Vol.453 (1), p.239-250
Main Authors: Hakobyan, Rafik S., Sargsyan, Karine M., Tabirian, Nelson V.
Format: Article
Language:English
Subjects:
hydrodynamics
light-induced reorientation
nematic liquid crystals
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Summary:The dynamics of the direct volume expansion mechanism of light induced hydrodynamic motions in homeotropic and hybrid oriented NLC have been studied theoretically. In case of homeotropic initial orientation of NLC molecules the velocity gradient induces a curvature of director. In the case of hybrid initial orientation of NLC velocity gradient brings about a small increase of curvature when hydrodynamic flow velocity is directed out of the "flexible ribbon's" curvature. The "flexible ribbon" reverses its curvature when velocity is directed into "flexible ribbon's" curvature.
ISSN:1542-1406
1563-5287
DOI:10.1080/15421400600653845