A thermomechanical coupling in cholesteric liquid crystals: Unidirectional rotation of double-twist cylinders driven by heat flux

Shinji Bono, Yuji Maruyama, Katsu Nishiyama, Yuka Tabe

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Abstract.: We made aggregates of cholesteric liquid crystalline Cylinders with Double-Twist orientational structure (DTC) and investigated their rigid-body rotation under a temperature gradient, focusing on how the rotational speed should depend on the cylinder size. The experimental results showed that the angular velocity of the DTC aggregates linearly increased with the height of the cylinders and was inversely proportional to the base area. With a phenomenological equation, we analyzed the torque caused by the heat flux and its balance with the viscous friction, and found that the simple analysis well explained the size-dependence of the rotation of the DTC aggregates. The coupling constant between the heat flux and the torque to drive the rigid-body rotation was in the same order of magnitude as that for the director rotation. Graphical abstract: [Figure not available: see fulltext.].

Original languageEnglish
Article number99
JournalEuropean Physical Journal E
Volume42
Issue number8
DOIs
Publication statusPublished - 2019 Aug 1

Fingerprint

Cholesteric liquid crystals
Liquid Crystals
Engine cylinders
Heat flux
heat flux
Hot Temperature
liquid crystals
Torque
rigid structures
torque
Friction
Angular velocity
angular velocity
Thermal gradients
temperature gradients
friction
Crystalline materials
Temperature
Liquids
liquids

Keywords

  • Topical issue: Thermal Non-Equilibrium Phenomena in Soft Matter

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Chemistry(all)
  • Materials Science(all)
  • Surfaces and Interfaces

Cite this

A thermomechanical coupling in cholesteric liquid crystals : Unidirectional rotation of double-twist cylinders driven by heat flux. / Bono, Shinji; Maruyama, Yuji; Nishiyama, Katsu; Tabe, Yuka.

In: European Physical Journal E, Vol. 42, No. 8, 99, 01.08.2019.

Research output: Contribution to journalArticle

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