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Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/6039
Title: Generalized nematohydrodynamic boundary conditions with application to bistable twisted nematic liquid-crystal displays
Authors: Fang, Angbo
Qian, Tie-Zheng
Sheng, Ping
Keywords: Hydrodynamics
Liquid crystal displays
Liquid theory
Electro-optical devices
Nematic liquid crystals
Surface dynamics
Variational techniques
Viscosity
Issue Date: 8-Dec-2008
Citation: Physical review E, v. 78, iss. 6, p. 061703, 2008
Abstract: Parallel to the highly successful Ericksen-Leslie hydrodynamic theory for the bulk behavior of nematic liquid crystals (NLCs), we derive a set of coupled hydrodynamic boundary conditions to describe the NLC dynamics near NLC-solid interfaces. In our boundary conditions, translational flux (flow slippage) and rotational flux (surface director relaxation) are coupled according to the Onsager variational principle of least energy dissipation. The application of our boundary conditions to the truly bistable π-twist NLC cell reveals a complete picture of the dynamic switching processes. It is found that the thus far overlooked translationrotation dissipative coupling at solid surfaces can accelerate surface director relaxation and enhance the flow rate. This can be utilized to improve the performance of electro-optical nematic devices by lowering the required switching voltages and reducing the switching times.
Rights: Physical Review E © copyright 2008 American Physical Society. The journal's web site is located at http://pre.aps.org
URI: http://hdl.handle.net/1783.1/6039
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