1. Electrohydrodynamic Convection in Nematics: Hybrid and Tilted Alignment
- Author
-
Werner Pesch, A. Hertrich, and Alexei Krekhov
- Subjects
Convection ,Materials science ,Physics and Astronomy (miscellaneous) ,Condensed matter physics ,business.industry ,Homeotropic alignment ,General Engineering ,Oblique case ,Atomic and Molecular Physics, and Optics ,Condensed Matter::Soft Condensed Matter ,Physics::Fluid Dynamics ,Planar ,Tilt (optics) ,Optics ,Liquid crystal ,Wavenumber ,Electrohydrodynamics ,business - Abstract
We calculate the threshold of electrohydrodynamic convection (EHC) for nematic liquid crystals with negative dielectric anisotropy, where one allows for different director orientations at the upper and lower confining plates (hybrid cells). Besides the planar versus homeotropic case we present for the first time an analysis of continuous tilt at one plate. The predistorted ground state strongly influences the EHC character and the roll orientation. One observes a generic nonstationary behaviour and in particular the interesting scenario of drifting oblique rolls.
- Published
- 1995