Document Detail

Electrorheological effect and directional non-Newtonian behavior in a nematic capillary subjected to a pressure gradient.
MedLine Citation:
PMID:  18351865     Owner:  NLM     Status:  PubMed-not-MEDLINE    
We consider a capillary consisting of two coaxial cylinders whose core is filled with a nematic liquid crystal (LC) subjected to the simultaneous action of both a pressure gradient applied parallel to the axis of the cylinders and a radial low frequency electric field. We find the configuration of the director of the nematic, initially with an escaped-like configuration, for the flow aligning LC 4'-n-pentyl-4-cyanobiphenyl (5CB) by assuming hard anchoring hybrid boundary conditions. Also, we obtain the velocity profile parametrized by the electric field and the pressure gradient for nonslip boundary conditions. Finally, we calculate exactly the effective viscosity, the first normal stress difference, and the dragging forces on the cylinders. The results show an important electrorheological effect and a directional non-Newtonian response with regions of flow thinning and thickening.
Carlos I Mendoza; A Corella-Madueño; J Adrián Reyes
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Publication Detail:
Type:  Journal Article     Date:  2008-01-30
Journal Detail:
Title:  Physical review. E, Statistical, nonlinear, and soft matter physics     Volume:  77     ISSN:  1539-3755     ISO Abbreviation:  Phys Rev E Stat Nonlin Soft Matter Phys     Publication Date:  2008 Jan 
Date Detail:
Created Date:  2008-03-20     Completed Date:  2008-05-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101136452     Medline TA:  Phys Rev E Stat Nonlin Soft Matter Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  011706     Citation Subset:  -    
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apdo. Postal 70-360, 04510 México, DF, Mexico.
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