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MODELING OF THE DYNAMICS OF A LIQUID CRYSTAL UNDER THE ACTION OF WEAK PERTURBATIONS

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Abstract

We study dynamic processes in liquid crystals using a simplified mathematical model in which a liquid crystal is considered as a finely dispersed continuous medium with rotating particles that has elastic resistance to volume deformation and viscoelastic resistance to the relative rotation of particles. The oscillatory regime of rotational motion described by the Klein–Gordon equation for tangential stress is studied. Moment interactions of particles due to the inhomogeneity of the rotation field are taken into account. The dispersion properties described by a subsystem of two equations for tangential stress and angular velocity are investigated. These equations are used to numerically analyze the rotation field in a liquid crystal under the action of tangential stress caused by the thermal expansion of a metal plate at the boundary. We consider the problem of perturbation of an extended layer of a 5CB liquid crystal by an electric field generated by charges on capacitor plates located periodically along the layer. Singularities of the electric potential at the ends of the capacitor plates are selected explicitly. Some results of computations simulating the Fréedericksz effect in the liquid crystal layer are presented.

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Authors and Affiliations

  1. Institute of Computational Modeling, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

    V. M. Sadovskii, O. V. Sadovskaya & I. V. Smolekho

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  1. V. M. Sadovskii
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  2. O. V. Sadovskaya
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  3. I. V. Smolekho
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Correspondence to V. M. Sadovskii.

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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, 2021, Vol. 62, No. 1, pp. 193–206.https://doi.org/10.15372/PMTF20210121.

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Sadovskii, V.M., Sadovskaya, O.V. & Smolekho, I.V. MODELING OF THE DYNAMICS OF A LIQUID CRYSTAL UNDER THE ACTION OF WEAK PERTURBATIONS. J Appl Mech Tech Phy 62, 170–182 (2021). https://doi.org/10.1134/S0021894421010211

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