Molecular order at the free surface of a nematic liquid crystal from light reflectivity measurements

1971 ◽  
Vol 34 (6) ◽  
pp. 331-332 ◽  
Author(s):  
M.A. Bouchiat ◽  
D. Langevin-Cruchon
Keyword(s):  
Free Surface ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Molecular Order

Three-dimensional coating flow of nematic liquid crystal on an inclined substrate

2015 ◽  
Vol 26 (5) ◽  
pp. 647-669 ◽  
Author(s):  
M. A. LAM ◽  
L. J. CUMMINGS ◽  
T.-S. LIN ◽  
L. KONDIC
Keyword(s):  
Free Surface ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Nonlinear Partial Differential Equation ◽  
Three Dimensional ◽  
Travelling Wave ◽  
Linear Stability Theory ◽  
Newtonian Flow ◽  
Surface Evolution ◽  
Coating Flow

We consider a coating flow of nematic liquid crystal (NLC) fluid film on an inclined substrate. Exploiting the small aspect ratio in the geometry of interest, a fourth-order nonlinear partial differential equation is used to model the free surface evolution. Particular attention is paid to the interplay between the bulk elasticity and the anchoring conditions at the substrate and free surface. Previous results have shown that there exist two-dimensional travelling wave solutions that translate down the substrate. In contrast to the analogous Newtonian flow, such solutions may be unstable to streamwise perturbations. Extending well-known results for Newtonian flow, we analyse the stability of the front with respect to transverse perturbations. Using full numerical simulations, we validate the linear stability theory and present examples of downslope flow of nematic liquid crystal in the presence of both transverse and streamwise instabilities.

DMR Study of Molecular Order In A Reentrant Nematic Liquid Crystal

1985 ◽  
Vol 122 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Ronald Y. Dong ◽  
J. S. Lewis ◽  
E. Tomchuk ◽  
E. Bock
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Molecular Order

scholarly journals Effects of spatially-varying substrate anchoring on instabilities and dewetting of thin nematic liquid crystal films

Soft Matter ◽  
2020 ◽  
Vol 16 (44) ◽  
pp. 10187-10197
Author(s):  
Michael-Angelo Y.-H. Lam ◽  
Lou Kondic ◽  
Linda J. Cummings
Keyword(s):  
Free Surface ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Surface Evolution ◽  
Liquid Crystal Films ◽  
Crystal Films ◽  
Spatially Varying ◽  
Variable Substrate

We investigate (theoretically and numerically) free surface evolution of nematic liquid crystal films in the presence of variable substrate anchoring.

scholarly journals Manipulating molecular order in nematic liquid crystal capillary bridgesviasurfactant adsorption: guiding principles from dissipative particle dynamics simulations

2018 ◽  
Vol 20 (48) ◽  
pp. 30514-30524 ◽  
Author(s):  
Zeynep Sumer ◽  
Alberto Striolo
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystal ◽  
Dissipative Particle Dynamics ◽  
Tail Length ◽  
Particle Dynamics ◽  
Molecular Order ◽  
Guiding Principles ◽  
Dynamics Simulations

Effect of surfactant tail length on the orientation of liquid crystals is investigated with dissipative particle dynamics (DPD) simulations.

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