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Flow-induced states in channel-confined nematics

Presented by: 
Simon Copar University of Ljubljana
Thursday 16th May 2019 - 14:10 to 14:50
INI Seminar Room 1
Anisotropy of liquid crystals couples their orientational order to velocity shear, and consequently, induces different regimes in flows with different strengths. A flow-aligning nematic liquid crystal, confined to a channel with homeotropic surface alignment, is known to undergo a transition from a homeotropic to a flow-aligned state. I will present a more detailed view of this behaviour, including a hidden pre-transitional state with broken chiral symmetry and dynamics of flow-aligned domain under uniform or alternating flow. Additionally, I will present a Landau model that captures the stability of different states with respect to material parameters.
University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons