Spatio-temporal patterns in the thermoconvection of a planar nematic layer: II. Experiments

  • E. Plaut
  • L. Pastur
  • R. Ribotta

Abstract:

We study experimentally the evolution of thermoconvection in a laterally extended planar nematic layer, at zero or weak stabilizing magnetic field. As the applied thermal gradient is increased, a cascade of symmetry breakings occurs, towards structures of increasing spatial complexity, and ultimately towards oscillating states. The patterns are characterized optically, and simple models for the distortion of the vertical (out of plane) component of the director field are proposed.

PACS. 47.54.+r Pattern selection; pattern formation - 47.20.Bp Buoyancy-driven instability - 42.70.Df Surface-tension-driven instability 

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Copyright information

© EDP Sciences, Springer-Verlag 1998

Authors and Affiliations

  • E. Plaut
    • 1
  • L. Pastur
    • 1
  • R. Ribotta
    • 1
  1. 1.Laboratoire de Physique des Solides, Université Paris-Sud, 91405 Orsay Cedex, FranceFR

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