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Related Experiment Videos

Lattice Boltzmann algorithm to simulate isotropic-nematic emulsions.

N Sulaiman1, D Marenduzzo, J M Yeomans

  • 1Rudolf Peierls Centre for Theoretical Physics, 1 Keble Road, Oxford, OX1 3NP, United Kingdom.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 13, 2006
PubMed
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Lattice Boltzmann simulations reveal how electric fields influence isotropic fluid drops in nematic liquid crystals. The study examines droplet shape and director field textures under varying conditions.

Area of Science:

  • Fluid dynamics
  • Soft matter physics
  • Computational physics

Background:

  • Nematic liquid crystals exhibit complex behavior influenced by external fields and boundary conditions.
  • Understanding the dynamics of isotropic fluid drops within liquid crystal solvents is crucial for various applications.

Purpose of the Study:

  • To simulate and analyze the behavior of an isotropic fluid drop in a nematic liquid crystal solvent using lattice Boltzmann methods.
  • To investigate the impact of electric fields on droplet shape and director field textures.
  • To explore the influence of material properties like elastic constants and surface tension.

Main Methods:

  • Coupled lattice Boltzmann simulations solving Beris-Edward, Cahn-Hilliard, and Navier-Stokes equations.
  • Implementation of the lattice Boltzmann algorithm to minimize spurious velocities.

Related Experiment Videos

  • Parametric study of liquid crystal elastic constant (K), anchoring strength (W), and surface tension (sigma).

    • Main Results:

    • The study characterizes equilibrium droplet shapes and director field textures influenced by K, W, and sigma.
    • Simulations demonstrate the dynamic response of the droplet to electric field-induced director switching.
    • The method successfully tracks the motion of isotropic drops in cells with tilted boundary director fields.

    Conclusions:

    • Lattice Boltzmann simulations provide a robust framework for studying complex fluid dynamics in liquid crystals.
    • Electric fields significantly alter the behavior and morphology of isotropic drops within nematic solvents.
    • The findings offer insights into the control and manipulation of microstructures in liquid crystal systems.