منابع مشابه
Surface modes at the nematic-isotropic interface.
We examine surface modes at the nematic-isotropic interface using the generalized dynamical Landau-de Gennes theory. We assume an isothermal, infinite, unbounded nematic-isotropic system characterized by a scalar order parameter, both phases having the same density and viscosity, respectively. The generalized dispersion relation is obtained and analyzed in particular cases. Order parameter rela...
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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....
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We extend the theory for surface modes at the nematic-isotropic interface[2, 3, 5, 7] to study comparatively two systems: nematic–nonnematic and polymer-nematic mixtures. We employ the dynamical generalization of the Landau-de Gennes model for the orientational (non-conserved) order parameter, coupled with the Cahn-Hilliard equation for concentration (conserved parameter), and include hydrodyna...
متن کاملBiaxiality at the isotropic-nematic interface with planar anchoring.
We revisit the classic problem of the structure of the isotropic-nematic interface within Ginzburg-Landau-de Gennes theory, refining previous analytic treatments of biaxiality at the interface. We compare our analysis with numerical results obtained through a highly accurate spectral collocation scheme for the solution of the Landau-Ginzburg-de Gennes equations. In comparison to earlier work, w...
متن کاملSharp-interface nematic-isotropic phase transitions with flow
We present a sharp-interface theory for phase transformations between the isotropic and uniaxial nematic phases of a flowing liquid crystal. These equations include a supplemental interface condition which expresses the balance of configurational momentum. As an application, we study the behavior a spherical isotropic drop surrounded by a radially-oriented nematic phase. For this problem, the b...
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ژورنال
عنوان ژورنال: Brazilian Journal of Physics
سال: 1998
ISSN: 0103-9733
DOI: 10.1590/s0103-97331998000400002