Photo-controllable thermal diffusivity and thermal conductivity driven by the orientation change of nematic liquid crystal with azo-dendrimers

2015 ◽  
Vol 107 (22) ◽  
pp. 221901 ◽  
Author(s):  
Meguya Ryu ◽  
Hideo Takezoe ◽  
Osamu Haba ◽  
Koichiro Yonetake ◽  
Junko Morikawa
Keyword(s):  
Thermal Conductivity ◽  
Liquid Crystal ◽  
Thermal Diffusivity ◽  
Nematic Liquid Crystal ◽  
Orientation Change

Temperature influence on orientation dynamics of oscillatory Poiseuille flow of nematic liquid crystal

2010 ◽  
Vol 7 ◽  
pp. 172-181
Author(s):  
I.Sh. Nasibullayev ◽  
U.R. Kamaletdinova
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Poiseuille Flow ◽  
External Influence ◽  
Temperature Influence ◽  
Surface Anchoring ◽  
Orientation Behaviour ◽  
Orientation Change ◽  
Low Amplitude ◽  
Flow Plane

In this work is studying temperature influence and surface anchoring in orientation behaviour of oscillatory Poiseuille flow of nematic liquid crystal (NLC) in the plane cell. Without external influence molecules lays along flow plane. Molecules orientation change and caused by this back-flow is studied by low-amplitude decomposition.

Thermal conductivity of the nematic liquid crystal 4-n-pentyl-4’-cyanobiphenyl

1994 ◽  
Vol 49 (1) ◽  
pp. 545-553 ◽  
Author(s):  
Guenter Ahlers ◽  
David S. Cannell ◽  
Lars Inge Berge ◽  
Shinichi Sakurai
Keyword(s):  
Thermal Conductivity ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal

Magnetic-field effect on thermal convection of a nematic liquid crystal at large Rayleigh numbers

2013 ◽  
Vol 716 ◽  
Author(s):  
Stephan Weiss ◽  
Guenter Ahlers
Keyword(s):  
Magnetic Field ◽  
Thermal Conductivity ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Thermal Convection ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Vertical Magnetic Field ◽  
Cylindrical Cell ◽  
Rayleigh Numbers

AbstractWe report on near-turbulent thermal convection of a nematic liquid crystal heated from below in a cylindrical cell with an aspect ratio (diameter/height) equal to 0.50 for Rayleigh numbers $2\times 1{0}^{7} \lesssim \mathit{Ra}\lesssim 3\times 1{0}^{8} $ and a Prandtl number of about 355. The Nusselt number $\mathit{Nu}$ as a function of $\mathit{Ra}$ did not differ significantly from that of an isotropic fluid. In a vertical magnetic field $\mathbi{H}$, we found $\mathit{Nu}(H)/ \mathit{Nu}(0)= 1+ a(\mathit{Ra}){H}^{2} $, with $a(\mathit{Ra})= 0. 24{\mathit{Ra}}^{0. 75} ~{\mathrm{G} }^{- 2} $. We present a model that describes the $H$ dependence in terms of a change of the thermal conductivity in the thermal boundary layers due to a field-induced director alignment.

Ising-Bloch transition in a nematic liquid crystal

1994 ◽  
Vol 4 (2) ◽  
pp. 319-331 ◽  
Author(s):  
J.M Gilli ◽  
M. Morabito ◽  
T. Frisch
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal

LIQUID CRYSTLASLIGHT SCATTERING BY FLUCTUATIONS INDUCED BY AN APPLIED ELECTRIC FIELD IN A NEMATIC LIQUID CRYSTAL (APAPA)

1972 ◽  
Vol 33 (C1) ◽  
pp. C1-63-C1-67 ◽  
Author(s):  
M. BERTOLOTTI ◽  
B. DAINO ◽  
P. Di PORTO ◽  
F. SCUDIERI ◽  
D. SETTE
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Applied Electric Field
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