Mesoscopic Simulation of Nematic Liquid Crystals in Microfluidics

  • Date: Mar 3, 2017
  • Time: 10:15 AM - 11:15 AM (Local Time Germany)
  • Speaker: Dr. Kuang-Wu Lee
  • Friedrich-Alexander-Universität Erlangen-Nürnberg
  • Location: Max-Planck-Institut für Dynamik und Selbstorganisation (MPIDS)
  • Room: SR 0.77
  • Host: DCF
  • Contact:
Topological defect has been proposed as guiding rail in nematic liquid crystal system, for
which it can be used for precise particle transportation in the future microfluidics.
Complex fluids in the microscopic world have different properties than our daily
experience. Microfluidics is mostly diffusion dominant and thermal fluctuation plays
important role in many phenomena. We develop a new stochastic rotation dynamics
(SRD) model for nematic liquid crystals (NLCs). This particle-based model preserved
thermal fluctuations as its essential influence on various transport phenomena in
microfluidics. I will demonstrate the validation of this model on some well-known LC
rheological phenomena, such as shear banding and shear isotropic-nematic phase
transition. One of the most interested topic in LC applications is the
electrohydrodynamics convection (EHC) when LC is subjected to external AC field. Up
to date there are only very limited study on the EHC development in the fully nonlinear
regime. I will address the capability of this new LC SRD model on studying EHC
generation and preliminary results will be shown.
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