Abstract
The theoretical prediction of the interrelation between the relaxation processes and hydrodynamic phenomena observed in nematic liquid crystals (NLCs) under binary acoustic action at MHz frequencies is experimentally substantiated. The existence of a new (relaxation) mechanism of streaming generation in thin layers of the mesophase is proven by the results of measurements of the velocity of steady-state acoustic streaming in the NLC in a planar capillary with homeotropic boundary conditions induced by the simultaneous action of coherent compressional and shear waves. A model that takes into account not only the classical convective contribution to the streaming formation but also the nonlinear relaxation one is tested for the first time. It is shown that only this model describes the aforementioned phenomenon consistently with the experimental data.
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Original Russian Text © O.A. Kapustina, 2011, published in Kristallografiya, 2011, Vol. 56, No. 2, pp. 527–532.
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Kapustina, O.A. On the interrelation between relaxation and hydrodynamic phenomena in nematic liquid crystals. Crystallogr. Rep. 56, 491–496 (2011). https://doi.org/10.1134/S106377451102009X
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DOI: https://doi.org/10.1134/S106377451102009X