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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2008, Volume 59, Issue 2, 181-184

https://doi.org/10.37358/RC.08.2.1730

Cristina Miron

Experimental and Theoretical Study of Electroconvection in Homeotropic Nematic Liquid Crystal

Abstract:

Electroconvection patterns have been studied in a homeotropic nematic liquid crystal, experimental and theoretical, with unusual combination of material parameters, negative conductivity and positive dielectric permittivity anisotropies. Exploring the complete phase diagram in the (U, q) space three distinct morphologies, rolls and squares, soft squares and hard squares have been identified. We perform a linear and nonlinear analysis of the full nematohydrodynamic equations and carry out simulations of a suitably constructed Lorenz model. We obtain in agreement with the experiments modulated rolls and squares at threshold.

Keywords:
nematic liquid crystal; electrohydrodynamic instabilities

Issue: 2008, Volume 59, Issue 2
Pages: 181-184
Publication date: 2008/3/9
https://doi.org/10.37358/RC.08.2.1730
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