Non-Newtonian rheological properties of shearing nematic liquid crystal model systems based on the Gay–Berne potential

2015 ◽  
Vol 17 (25) ◽  
pp. 16615-16623 ◽  
Author(s):  
Sten Sarman ◽  
Yong-Lei Wang ◽  
Aatto Laaksonen
Keyword(s):  
Liquid Crystal ◽  
Shear Rate ◽  
Rheological Properties ◽  
Linear Function ◽  
Nematic Liquid Crystal ◽  
Model Systems ◽  
Square Root ◽  
Crystal Model

The logarithm of the viscosity of a nematic liquid crystal is a linear function of the square root of the shear rate in the non-Newtonian regime.

ON AN ORIENTATION TRANSITION IN NEMATIC LIQUID CRYSTALS INDUCED BY THE THICKNESS OF THE SAMPLE

1993 ◽  
Vol 07 (18) ◽  
pp. 1215-1222
Author(s):  
A. L. ALEXE-IONESCU
Keyword(s):  
Experimental Data ◽  
Phase Transitions ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Tilt Angle ◽  
Critical Thickness ◽  
Large Range ◽  
Square Root ◽  
Chiral Molecules ◽  
Homeotropic Orientation

An orientation transition observed in nematic liquid crystal samples, induced by the thickness, is interpreted in a new way. By supposing that the nematic liquid crystal contains chiral impurities, it is shown that the homeotropic orientation is stable only for thicknesses smaller than a critical one, and is dependent on the concentration of the chiral molecules. At the critical thickness, the transition from the homeotropic orientation to the distorted one is characterized by a tilt angle proportional to the square root of the actual thickness minus the critical one. This trend is typical of second order phase transitions. The agreement between the theory and the experimental data is fairly good over a large range of thickness of the sample.

scholarly journals Electro-Rheological Properties of Liquid Crystal in High Shear Rate Region

2007 ◽  
Vol 35 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Takatsune Narumi ◽  
Hiroyoshi Maeda ◽  
Hiroyuki Yoshizawa ◽  
Tomiichi Hasegawa
Keyword(s):  
Liquid Crystal ◽  
Shear Rate ◽  
Rheological Properties ◽  
High Shear Rate ◽  
High Shear ◽  
Rate Region

Thermomechanical coupling in coarse grained cholesteric liquid crystal model systems with pitches of realistic length

2016 ◽  
Vol 18 (25) ◽  
pp. 16822-16829 ◽  
Author(s):  
Sten Sarman ◽  
Yong-Lei Wang ◽  
Aatto Laaksonen
Keyword(s):  
Liquid Crystal ◽  
Temperature Gradient ◽  
Cholesteric Liquid Crystal ◽  
Model Systems ◽  
Thermomechanical Coupling ◽  
Coarse Grained ◽  
Crystal Model

Cholesteric liquid crystal where the director is rotated by a temperature gradient.

scholarly journals Reproductivity for a nematic liquid crystal model

2006 ◽  
Vol 57 (6) ◽  
pp. 984-998 ◽  
Author(s):  
Blanca Climent-Ezquerra ◽  
Francisco Guillén-González ◽  
Marko Rojas-Medar
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Crystal Model

scholarly journals Sufficient conditions for regularity and uniqueness of a 3D nematic liquid crystal model

2009 ◽  
Vol 282 (6) ◽  
pp. 846-867 ◽  
Author(s):  
F. Guillén-González ◽  
M. A. Rodríguez-Bellido ◽  
M. A. Rojas-Medar
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Sufficient Conditions ◽  
Crystal Model

Rheological properties of a reentrant nematic liquid crystal

2012 ◽  
Vol 86 (1) ◽  
Author(s):  
J. Ananthaiah ◽  
M. Rajeswari ◽  
V. S. S. Sastry ◽  
R. Dabrowski ◽  
Surajit Dhara
Keyword(s):  
Liquid Crystal ◽  
Rheological Properties ◽  
Nematic Liquid Crystal

scholarly journals Instability of point defects in a two-dimensional nematic liquid crystal model

2016 ◽  
Vol 33 (4) ◽  
pp. 1131-1152 ◽  
Author(s):  
Radu Ignat ◽  
Luc Nguyen ◽  
Valeriy Slastikov ◽  
Arghir Zarnescu
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Point Defects ◽  
Two Dimensional ◽  
Crystal Model
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