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Generalized Nematohydrodynamic Boundary Conditions with Application to Bistable Twisted Nematic Liquid-crystal Displays

Authors Fang, Angbo HKUST affiliated (currently or previously)
Qian, Tiezheng View this author's profile
Sheng, Ping View this author's profile
Issue Date 2008
Source Physical Review E , v. 78, (6), December 2008, article number 061703
Summary 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 translation-rotation 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.
ISSN 2470-0045
Rights © 2008 American Physical Society
Language English
Format Article
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