TITLE

Conoscopic observation of director reorientation during Poiseuille flow of a nematic liquid crystal

AUTHOR(S)
Holmes, C. J.; Cornford, S. L.; Sambles, J. R.
PUB. DATE
October 2009
SOURCE
Applied Physics Letters;10/26/2009, Vol. 95 Issue 17, p171114
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Director reorientation under pressure driven (Poiseuille) flow is observed conoscopically for the liquid crystal 5CB aligned at an azimuthal angle of 45° to the direction of flow. A polyimide surface treatment (AL 1254) is used to promote planar homogeneous alignment and rubbed to produce an initial azimuthal alignment angle [lowercase_phi_synonym]0. Conoscopic interference figure rotation is documented as a function of flow rate and compared to that produced from numerical models using Leslie–Ericksen–Parodi theory. Model and data show excellent agreement.
ACCESSION #
44909804

 

Related Articles

  • Cryogenic fluid dynamics of pressure swirl injectors at supercritical conditions. Nan Zong; Vigor Yang // Physics of Fluids;May2008, Vol. 20 Issue 5, p056103 

    A comprehensive numerical analysis has been conducted to explore the development of liquid-oxygen (LOX) flow in pressure swirl injectors operating at supercritical pressures. The model is based on full-conservation laws and accommodates real-fluid thermodynamics and transport phenomena over the...

  • Shear-driven and pressure-driven flow of a nematic liquid crystal in a slowly varying channel. Carou, J. Quintans; Duffy, B. R.; Mottram, N. J.; Wilson, S. K. // Physics of Fluids;Feb2006, Vol. 18 Issue 2, p027105 

    Motivated by the industrially important processes of blade coating and cavity filling of liquid crystalline materials, we consider steady, two-dimensional shear-driven (Couette) and pressure-driven (plane Poiseuille) flow of a thin film of a nematic liquid crystal in the slowly varying channel...

  • Trefftz method for solving two-dimensional temperature field of boiling fluid flowing along the minichannel. Hożejowska, S.; Piasecka, M.; Hożejowski, L. // EPJ Web of Conferences;2013, Issue 45, p01040-p.1 

    The paper focuses on the numerical solution to two-dimensional temperature field of boiling liquid flowing along a vertical, asymmetrically heated minichannel with a rectangular cross-section. One of the walls of a minichannel is a DC supplied heating foil. The parallel walls are made of glass...

  • Pretransitional anomalies in the orientational dynamics induced by temperature gradient in nematic hybrid-oriented cells. Zakharov, A. V.; Vakulenko, A. A.; Romano, Silvano // Journal of Chemical Physics;2/21/2008, Vol. 128 Issue 7, p074905 

    We have carried out a numerical study of the system of hydrodynamic equations including director reorientation, fluid flow, and temperature redistribution across a hybrid-oriented liquid crystal cell (HOLCC), where the nematic sample is confined by two parallel horizontal surfaces, a temperature...

  • Thermally excited vortical flow in a thin bidirectionally oriented nematic cell. Zakharov, A. V.; Vakulenko, A. A. // Physics of Fluids;Jul2012, Vol. 24 Issue 7, p073102 

    The theoretical description of the reorientational dynamics in a thin bidirectionally aligned liquid crystal cell (BALC), where the nematic sample is confined by two horizontal and two lateral surfaces, under the influence of a temperature gradient ∇T is presented. We have carried out a...

  • Influence of nozzle arrangement on flow and heat transfer characteristics of arrays of circular impinging jets. Makatar Wae-hayee; Perapong Tekasakul; Chayut Nuntadusit // Songklanakarin Journal of Science & Technology;Mar/Apr2013, Vol. 35 Issue 2, p203 

    The effect of jet arrangements on flow and heat transfer characteristics was experimentally and numerically investigated for arrays of impinging jets. The air jets discharge from round orifices and perpendicularly impinge on a surface within a rectangular duct. Both the in-line and staggered...

  • Analytical and numerical solutions for a single vertical drain including the effects of vacuum preloading. Indraratna, Buddhima; Rujikiatkamjorn, Cholachat; Sathananthan, Iyathurai // Canadian Geotechnical Journal;Aug2005, Vol. 42 Issue 4, p994 

    A system of vertical drains combined with vacuum preloading is an effective method to accelerate soil consolidation by promoting radial flow. This study presents the analytical modeling of vertical drains incorporating vacuum preloading in both axisymmetric and plane strain conditions. The...

  • Effect of shape imperfections on thin-walled pipe bends under out-ofplane moment and internal pressure. Buckshumiyan, A.; Veerappan, A. R.; Shanmugam, S. // Applied Mechanics & Materials;2014, Issue 592-594, p1050 

    This paper quantifies the effect of ovality and thinning/thickening of thin-wall pipe bend modeled using the geometric parameters of r/t=15 and 20 and λ=0.1 to 0.3. For each model the ovality and thinning is varied from 5% to 20 % in steps of 5 %. The collapse loads were obtained from...

  • Flow properties of liquid crystal phases of the Gay-Berne fluid. Sarman, Sten // Journal of Chemical Physics;5/8/1998, Vol. 108 Issue 18, p7909 

    Investigates the flow properties of liquid crystal phases of the Gay-Berne fluid. Performance of molecular dynamics simulation; Evaluations on the Green-Kubo relations for various viscosity coefficients; Significance on the change of smectic A phase from nematic phase at high temperature;...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics