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Conoscopic observation of director reorientation during Poiseuille flow of a nematic liquid crystal

Appl. Phys. Lett. 95, 171114 (2009); doi:10.1063/1.3251792

Published 30 October 2009

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C. J. Holmes,1 S. L. Cornford,2 and J. R. Sambles1
1Electromagnetic Materials Group, School of Physics, University of Exeter, Exeter EX4 4QL, United Kingdom
2HP Labs Bristol, Long Down Avenue, Stoke Gifford, Bristol BS34 8QZ, United Kingdom
Director reorientation under pressure driven (Poiseuille) flow is observed conoscopically for the liquid crystal 5CB aligned at an azimuthal angle of 45° to the direction of flow. A polyimide surface treatment (AL 1254) is used to promote planar homogeneous alignment and rubbed to produce an initial azimuthal alignment angle phi0. Conoscopic interference figure rotation is documented as a function of flow rate and compared to that produced from numerical models using Leslie–Ericksen–Parodi theory. Model and data show excellent agreement. ©2009 American Institute of Physics
History: Received 10 August 2009; accepted 29 September 2009; published 30 October 2009
Permalink: http://link.aip.org/link/?APPLAB/95/171114/1
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KEYWORDS and PACS

Keywords
PACS
  • 61.30.Gd
    Orientational order of liquid crystals in electric and magnetic fields
  • 47.60.Dx
    Flows in ducts and channels
  • 66.20.Cy
    Theory and modeling of viscosity and rheological properties of liquids
  • 61.30.Hn
    Surface phenomena in liquid crystals
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (15)
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