Electrohydrodynamic Pattern Formation in Nematic Liquid Crystals by External Pure Noise

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概要

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• Pure noise-induced electrohydrodynamic convections (EHCs) in nematic liquid crystals are presented in comparison with ac field-induced ones. There exists a characteristic cutoff frequency $ f_{\text{c}}^{*}$ of noise dividing EHC patterns qualitatively. Sufficiently colored noise with $ f_{\text{c}} < f_{\text{c}}^{*}$ can induce a variety of well-ordered patterns such as Williams domains, fluctuating Williams domains, and grid patterns. The amplitude of the primary pattern (Williams domains) and its wavelength are investigated with varying intensity $V_{\text{N}}$ and/or cutoff frequency $ f_{\text{c}}$ of noise. The present noise-induced EHCs are discussed on the basis of the conventional (ac-based) Carr–Helfrich mechanism.

• 2010-12-15

著者

• Huh Jong-Hoon

  Department of Mechanical Information Science and Technology, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka, Fukuoka 820-8502, Japan

• Huh Jong-Hoon

  Department of Applied Science,Faculty of Engineering,Kyushu University

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