The Clausius-Mossotti relation for anisotropic molecular fluids

1981 ◽  
Vol 59 (3) ◽  
pp. 375-377 ◽  
Author(s):  
P. Palffy-Muhoray ◽  
D. A. Balzarini
Keyword(s):  
Correlation Function ◽  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Dipole Field ◽  
Anisotropic Fluid ◽  
Particle Correlation ◽  
Molecular Fluids ◽  
Molecular Distribution

It is shown that in the interior of a uniformly polarized homogeneous anisotropic fluid there exists a family of similar surfaces, determined by the two-particle correlation function, having the property that the dipole field at the origin due to molecules within these surfaces is zero. The resulting Clausius–Mossotti relation contains a parameter, ηαβ, which is a measure of the anisotropy of the molecular distribution. These results are applicable to nematic liquid crystals.

scholarly journals Elastic director vibrations in nematic liquid crystals

2014 ◽  
Vol 26 (1) ◽  
pp. 93-107 ◽  
Author(s):  
STEFANO S. TURZI
Keyword(s):  
Wave Propagation ◽  
Liquid Crystals ◽  
Sound Wave ◽  
Soft Matter ◽  
Nematic Liquid Crystals ◽  
Molecular Relaxation ◽  
Molecular Distribution ◽  
Nematic Elastomers ◽  
Small Anisotropy

Recently Biscari, DiCarlo and Turzi [Anisotropic wave propagation in nematic liquid crystals, Soft Matter 10, 8296–8307.] proposed a theory for nematoacustics which models nematic liquid crystals as nematic elastomers with molecular relaxation. Here, we extend the analysis of this theory to account for the director motion possibly induced by the propagation of a sound wave. We find that the director vibration is related to the - usually small - anisotropy of the molecular distribution, thus providing a justification to the relative high ultrasonic intensities required to observe non-negligible acousto-optic responses.

The electrohydrodynamic instability in twisted nematic liquid crystals

1994 ◽  
Vol 4 (2) ◽  
pp. 239-252 ◽  
Author(s):  
A. Hertrich ◽  
A. P. Krekhov ◽  
O. A. Scaldin
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Electrohydrodynamic Instability ◽  
Twisted Nematic

Surface disclinations in nematic liquid crystals

1975 ◽  
Vol 36 (1) ◽  
pp. 59-67 ◽  
Author(s):  
V. Vitek ◽  
M. Kléman
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals
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