| Numéro |
J. Phys. II France
Volume 5, Numéro 5, May 1995
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|
|---|---|---|
| Page(s) | 733 - 743 | |
| DOI | https://doi.org/10.1051/jp2:1995161 | |
DOI: 10.1051/jp2:1995161
J. Phys. II France 5 (1995) 733-743
1 Physikalisches Institut der Universität Bayreuth, 95440 Bayreuth, Germany
2 Physics Department, Bashkirian Research Center, Russian Academy of Sciences, 450025 Ufa, Russia
© Les Editions de Physique 1995
J. Phys. II France 5 (1995) 733-743
Electrohydrodynamic Convection in Nematics: Hybrid and Tilted Alignment
A. Hertrich1, A.P. Krekhov1, 2 and W. Pesch11 Physikalisches Institut der Universität Bayreuth, 95440 Bayreuth, Germany
2 Physics Department, Bashkirian Research Center, Russian Academy of Sciences, 450025 Ufa, Russia
(Received 15 November 1994, received in final form and accepted 7 February 1995)
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.
© Les Editions de Physique 1995