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    Generalized nematohydrodynamic boundary conditions with application to bistable twisted nematic liquid-crystal displays

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    Type
    Article
    Authors
    Fang, Angbo
    Qian, Tiezheng
    Sheng, Ping
    Date
    2008-12-08
    Permanent link to this record
    http://hdl.handle.net/10754/598403
    
    Metadata
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    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 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. © 2008 The American Physical Society.
    Citation
    Fang A, Qian T, Sheng P (2008) Generalized nematohydrodynamic boundary conditions with application to bistable twisted nematic liquid-crystal displays. Phys Rev E 78. Available: http://dx.doi.org/10.1103/PhysRevE.78.061703.
    Sponsors
    This work was supported by Hong Kong RGC Grant No. CA05/06.SC01. A. F. acknowledges support from the KAUST Global Research Partnership. T. Q. was also supported by Hong Kong RGC Grant No. 602007.
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review E
    DOI
    10.1103/PhysRevE.78.061703
    PubMed ID
    19256854
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevE.78.061703
    Scopus Count
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