Waves at the nematic-isotropic interface
Waves at the nematic-isotropic interface
We examine surface modes at the nematic-isotropic interface in polymer-liquid-crystal mixtures using the dynamical Landau-de Gennes model for the orientational (non-conserved) order parameter coupled with Cahn-Hilliard equation for concentration (conserved order parameter) and with hydrodynamic degrees of freedom. The generalized dispersion relation is obtained and analyzed in particular cases. Orientational order parameter relaxation dominates in the short wavelength limit, while in the long wavelength limit viscous damping becomes important. The effect of polymer is to increase the surface tension and as a consequence the relaxation rate in the hydrodynamic limit. Finally, we discuss how to measure experimentally the dispersion relation.
875-892
Popa-Nita, V.
068ec8ef-991a-40da-bbe5-3b2575be71d1
Oswald, P.
0b79dc13-976c-470b-a6d2-03336f69a79c
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6
2005
Popa-Nita, V.
068ec8ef-991a-40da-bbe5-3b2575be71d1
Oswald, P.
0b79dc13-976c-470b-a6d2-03336f69a79c
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6
Popa-Nita, V., Oswald, P. and Sluckin, T.J.
(2005)
Waves at the nematic-isotropic interface.
Molecular Crystals and Liquid Crystals, 435, .
(doi:10.1080/15421400590955299).
Abstract
We examine surface modes at the nematic-isotropic interface in polymer-liquid-crystal mixtures using the dynamical Landau-de Gennes model for the orientational (non-conserved) order parameter coupled with Cahn-Hilliard equation for concentration (conserved order parameter) and with hydrodynamic degrees of freedom. The generalized dispersion relation is obtained and analyzed in particular cases. Orientational order parameter relaxation dominates in the short wavelength limit, while in the long wavelength limit viscous damping becomes important. The effect of polymer is to increase the surface tension and as a consequence the relaxation rate in the hydrodynamic limit. Finally, we discuss how to measure experimentally the dispersion relation.
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Published date: 2005
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Local EPrints ID: 29605
URI: http://eprints.soton.ac.uk/id/eprint/29605
ISSN: 1542-1406
PURE UUID: 816fd751-f34c-4871-95b1-e82cf4cdb48f
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Date deposited: 12 May 2006
Last modified: 16 Mar 2024 02:32
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Author:
V. Popa-Nita
Author:
P. Oswald
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