Berlin 2015 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 51: Complex Fluids and Soft Matter - Part III (joint session DY/ CPP / BP)

DY 51.3: Vortrag

Donnerstag, 19. März 2015, 15:45–16:00, BH-N 334

A New Particle-Based Mesoscopic Model for Nematic Liquid Crystals — •Kuang-Wu Lee and Marco G. Mazza — Max-Planck-Institut für Dynamik und Selbstorganisation, 37077 Gottingen, Germany

We introduce a new mesoscopic model for nematic liquid crystals (LCs). This approach combines the particle-based stochastic rotation dynamics (SRD) method and the Ericksen-Leslie formulation of nematohydrodynamics. SRD has been used to investigate hydrodynamics at the mesoscopic level because it recovers the Navier-Stokes equation. We extend the SRD scheme to anisotropic fluids, i.e. nematic liquid crystals, by including the Ericksen-Leslie equations. We verify the applicability of this hybrid model by few study-cases in LC physics, e.g. the temperature-driven isotropic-nematic phase transition and the rheology of sheared LC. Our simulation results show that this hybrid model captures many essential aspects of LC physics at the macroscopic scale, while preserving microscopic thermal fluctuations.