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DY: Fachverband Dynamik und Statistische Physik

DY 40: Poster - Quantum Systems/ Stat. Phys./ Diffusive Process

DY 40.16: Poster

Donnerstag, 3. April 2014, 17:00–19:00, P3

Mesoscopic Model for Topological Defect in Nematic Liquid Crystals — •Kuang-Wu Lee, Marco G. Mazza, and S. Herminghaus — MPI für Dynamik und Selbstorganisation, 37077 Göttingen, Deutschland

Topological line defects in nemetic liquid crystals under flow has been investigated in microfluidic channels [Sengupta et al. 2013]. To study the dynamical nature of this topological defect and its shear flow/nematic elasticity interactions under different flow regimes, we develop a mesoscopic scheme based on the stochastic rotational dynamics (SRD) method. We adapt the SRD method to particles with orientational degree of freedom. The model is tested for the liquid crystal phase transition under different temperatures. The viscosity and rotational diffusion coefficients, usually assigned in fluid approach, are self-generated in this model, hence this mesoscopic model enables us to study the local transport due to flow.