Publicado

2008-09-01

LIQUID CRYSTAL RELAXATION IN THREE DIMENSIONS: THE EFFECT OF HYDRODYNAMIC INTERACTIONS

Palabras clave:


liquid crystal, defect relaxation, confinement and hydrodynamic interactions. (es)

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Autores/as

  • BRIAN T. GETTELFINGER Department of Chemical and Biological Engineering, University of Wisconsin-Madison, USA
  • FRANSISCO R. HUNG Department of Chemical and Biological Engineering, University of Wisconsin-Madison, USA
  • JUAN P. HERNANDEZ ORTIZ Escuela de Ingeniería de Materiales, Universidad Nacional de Colombia, Sede Medellín
  • ORLANDO GUZMAN Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, México
  • ALEJANDRO D. REY Department of Chemical Engineering, McGill University, Canada
  • NICHOLAS L. ABBOTT Department of Chemical and Biological Engineering, University of Wisconsin-Madison, USA
  • JUAN J. DE PABLO Department of Chemical and Biological Engineering, University of Wisconsin-Madison, USA

We investigate the relaxation of two line defects of opposite strength in a confined nematic liquid

crystal by solving the coupled tensor order parameter evolution and momentum balance equations in three dimensions. The inclusion of hydrodynamic interactions causes the defects to move at different velocities and slows the overall relaxation process, but this effect is suppressed by increasing the degree of confinement. The most notable flow features that develop in the system are large vortices that surround and follow the defects as they approach each other.

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