Defects and Disorder of Non-Linear Waves in Convection

  • R. Ribotta
  • A. Joets
Part of the NATO ASI Series book series (ASIC, volume 310)


The traveling-wave convection of an anisotropic fluid (a nematic liquid crystal) constitutes a novel model of nonlinear waves. We show experimentally that instabilities of the phase arise in form of localized states inducing shocks, which in turn trigger the nucleation of defects. The conditions for the nucleation, the topology and the role of these defects in the progressive disorganization of the basic wavetrain are studied. The main results can be satisfactorily simulated by using an evolution equation of the complex Newell-Landau-Ginzburg type.


Nematic Liquid Crystal Topological Defect Progressive Wave Convective Roll Anisotropic Fluid 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Kluwar Academic Publishers 1990

Authors and Affiliations

  • R. Ribotta
    • 1
  • A. Joets
    • 1
  1. 1.Laboratoire de Physique des SolidesUniversité de Paris-SudOrsay CedexFrance

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