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Brazilian Journal of Physics

, Volume 49, Issue 1, pp 17–21 | Cite as

High-Frequency Regime of the Acoustical Freédericksz Transition in Nematic Liquid Crystals

  • Carlindo VitorianoEmail author
Condensed Matter
  • 17 Downloads

Abstract

A novel approach to the acoustical Freédericksz transition in the high-frequency regime is developed. The prominent role played by bulk viscosities is highlighted. Using experimental data, it is shown that α/α4 = 2.7 × 103, where the combination αρ1 + ρ2 + ρ3 + α1 + α4 + α5 + α6 consists of shear and bulk viscosities of a nematic. The magnitude of this ratio is in agreement with what is found in fluids composed by molecules possessing several internal degrees of freedom.

Keywords

Nematic liquid crystal Acoustical Freédericksz transition Fluid dynamics Bulk viscosity 

Notes

Acknowledgements

We thank the support of CAPES (Brazilian Agency).

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Copyright information

© Sociedade Brasileira de Física 2018

Authors and Affiliations

  1. 1.Unidade Acadêmica do Cabo de Santo AgostinhoUniversidade Federal Rural de PernambucoGarapu, Cabo de Santo Agostinho, PernambucoBrazil

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