The Observation of Hydrodynamic Instability in a Cholesteric Liquid Crystal Layer Having a Free Surface

I. I. Gorina Institute of Crystallography of the Academy of Sciences of the U.S.S.R., Leninsky Porspect 59, Moscow, 117333, U.S.S.R.

N. L. Sizova Institute of Crystallography of the Academy of Sciences of the U.S.S.R., Leninsky Porspect 59, Moscow, 117333, U.S.S.R.

I. G. Chistyakov Institute of Crystallography of the Academy of Sciences of the U.S.S.R., Leninsky Porspect 59, Moscow, 117333, U.S.S.R.

A. G. Petrov Institute of Solid State Physics of the Bulgarian Academy of Sciences, Sofia, 1113, People's Republic of Bulgaria

A. I. Derzhansky Institute of Solid State Physics of the Bulgarian Academy of Sciences, Sofia, 1113, People's Republic of Bulgaria

Abstract

It was for the first time that a hydrodynamic instability has been experimentally observed in a layer of a cholesteric liquid crystal (CLC) having a free surface and being locally heated from below. Steady structures of CLC motion have been obtained in the form of rotating (in the place) spirals consisting of distinct rolls with sharp boundaries; motion in every such roll was note also. It is supposed that the convective instability observed is due to Marangoni effect.

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The Observation of Hydrodynamic Instability in a Cholesteric Liquid Crystal Layer Having a Free Surface

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The Observation of Hydrodynamic Instability in a Cholesteric Liquid Crystal Layer Having a Free Surface

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