Open AccessSPATIALLY MODULATED STRUCTURES IN NEMATIC LIQUID CRYSTAL UNDER OSCILLATORY COUETTE FLOW AT ULTRALOW FREQUENCIES
Author(s) -
E. N. Kozhevnikov,
Y.V. Samoilova
Publication year - 2012
Publication title -
vestnik samarskogo universiteta. estestvennonaučnaâ seriâ
Language(s) - English
Resource type - Journals
eISSN - 2712-8954
pISSN - 2541-7525
DOI - 10.18287/2541-7525-2012-18-6-113-123
Subject(s) - liquid crystal , homeotropic alignment , amplitude , materials science , mbba , shear (geology) , condensed matter physics , galerkin method , shear flow , nonlinear system , optics , distortion (music) , biaxial nematic , mechanics , physics , composite material , optoelectronics , amplifier , cmos , quantum mechanics
The distortion of homeotropic structure of nematic liquid crystal under the inuence of periodic shear at ultralow frequencies is theoretically described. It is shown that periodic shear action results in spatially modulated structure in NLC layer. Threshold shear amplitude and spacial periodicity of new molecular orientational structure are found on the base of nonlinear nematic liquid crystal hydrodynamic equations using Galerkin method. Theoretical analysis shows that at low frequencies threshold shear amplitude does not depend on frequency and the spatial period of the order of NLC layer thickness. Theoretical results are compared with experimental data.