Electrohydrodynamic Behavior in Twisted-Wedge Nematic Structures
نویسندگان
چکیده
منابع مشابه
Defect Core Structures in Twisted Nematic and Twisted Chiral Liquid Crystals
The defect structures of s = ±1/2 twist disclinations in twisted nematic and twisted chiral liquid crystals have been investigated within the Landau-de Gennes theory numerically. Our results show that there exists eigenvalue exchange across the defect core of both the two models. The defect core is essentially biaxial and never isotropic. The defect centre is uniaxial and is surrounded by a str...
متن کاملTransmission and reflection of a monochromatic beam in a twisted nematic wedge
The transmission and reflection of a monochromatic electromagnetic wave in a twisted nematic wedge are investigated, We consider the special case where the characteristic length f of the director twist is much higher than the optical wavelength A, By using the penurbative theoretical procedure proposed by Oldano et al., we find an analytic expression for the transmitted and reflected beams at t...
متن کاملNumerical bifurcation study of electrohydrodynamic convection in nematic liquid crystals.
We present the results of a numerical investigation of the Ericksen-Leslie equations for the problem of electrohydrodynamic convection in a nematic liquid crystal. The combination of a finite element approach and numerical bifurcation techniques allows us to provide details of the basic flow and include the physically relevant effect of nonslip side walls. We are also able to include material p...
متن کاملOptically active additives in twisted nematic devices
2014 A study has been made of the use of optically active additives in twisted nematic devices to remove areas of reverse twist, the results obtained depending on the chirality of the additives and the director alignment on the two containing surfaces. Under certain conditions degeneracy of the field induced reorientation of the director produces a patched appearance even in the absence of reve...
متن کاملElectrohydrodynamic Flow in Nematic Thin Films with Two Free Surfaces
Thin layers of nematic LC with two free surfaces show a peculiar vortex-pattern when subjected to an electric field. In this paper we report some new observations on the vortex motion and we show that the Felici's model of the charge injection from the electrodes cannot account for some experimental results. The lines of a new electrohydrodynamic model are proposed and compared with the experim...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Molecular Crystals and Liquid Crystals
سال: 1983
ISSN: 0026-8941
DOI: 10.1080/00268948308073473