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Colloids in liquid crystals: a lattice Boltzmann study

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)10547-10552
Number of pages6
JournalJournal of Materials Chemistry
Volume20
Issue number46
DOIs
StatePublished - 2010

Abstract

We propose a hybrid lattice Boltzmann algorithm to simulate the hydrodynamics of colloidal particles inside a liquid crystalline host. To validate our algorithm, we study the static and the microrheology of a colloid in a nematic, with tangential anchoring of the director field at the particle surface, and we confirm theories and experiments showing that the drag force in a nematic is markedly anisotropic. We then apply our method to consider the case of a colloid inside a cholesteric, and with normal anchoring at the surface. We show that by tuning the ratio between particle size and cholesteric pitch it is possible to control the defect configuration around the particle, and to stabilise novel figure-of-eight or highly twisted loops close to the colloid surface.

    Research areas

  • PARTICULATE SUSPENSIONS, NUMERICAL SIMULATIONS, TOPOLOGICAL DEFECTS, SPHERICAL-PARTICLE, EQUATION, FLUIDS

ID: 1188337