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- W2108489387 abstract "We analyse the variations of the director n and of the scalar order parameter S of a nematic liquid crystal in contact with a surface which imposes a sinusoidal boundary distortion. The amplitude A of the surface profile and the corresponding wavelength lambda vary in ranges compatible with the elastic regime Aq < 1, where q=2pi/lambda is the surface wave vector. The analysis is carried out by means of a Landau expansion of the free energy where both n and S gradients are taken into account. We obtain an evident coupling between S and n in a nematic surface layer of thickness xis of the order of a few hundred Angstroms. Moreover S can vanish close to the surface if the S distortion imposed by the boundary conditions is strong enough. The numerical approach presented in this paper is based on the finite element method." @default.
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- W2108489387 date "1999-09-01" @default.
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- W2108489387 title "Numerical investigation of surface distortion and order parameter variation in nematics" @default.
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- W2108489387 doi "https://doi.org/10.1080/026782999204011" @default.
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