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Article: Rotating electroosmotic flow of viscoplastic material between two parallel plates

TitleRotating electroosmotic flow of viscoplastic material between two parallel plates
Authors
Issue Date2017
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/colsurfa
Citation
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2017, v. 513, p. 355-366 How to Cite?
AbstractThis study aims to investigate electroosmotic flow of a viscoplastic material, modeled as either Bingham plastic or Casson fluid, through a parallel-plate channel that rotates about an axis perpendicular to the plates. A relatively small yield stress, comparable to that of human blood, is considered in order to confine to the condition there is only one yield surface in the flow. An iterative finite-difference numerical scheme is developed to solve the Cauchy momentum equations and nonlinear constitutive equations. The location of the yield surface, and velocity and stress components in both the sheared and unsheared regions are found as functions of the yield stress, rotation speed and Debye parameter. Numerical results are presented to reveal that the system rotation and yield stress may counteract each other in controlling the resultant flow rate and flow direction. The effect of yield stress may even be reversed for a sufficiently large rotation speed.
Persistent Identifierhttp://hdl.handle.net/10722/237757
ISSN
2017 Impact Factor: 2.829
2015 SCImago Journal Rankings: 0.831
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorQi, C-
dc.contributor.authorNg, CO-
dc.date.accessioned2017-01-20T02:28:05Z-
dc.date.available2017-01-20T02:28:05Z-
dc.date.issued2017-
dc.identifier.citationColloids and Surfaces A: Physicochemical and Engineering Aspects, 2017, v. 513, p. 355-366-
dc.identifier.issn0927-7757-
dc.identifier.urihttp://hdl.handle.net/10722/237757-
dc.description.abstractThis study aims to investigate electroosmotic flow of a viscoplastic material, modeled as either Bingham plastic or Casson fluid, through a parallel-plate channel that rotates about an axis perpendicular to the plates. A relatively small yield stress, comparable to that of human blood, is considered in order to confine to the condition there is only one yield surface in the flow. An iterative finite-difference numerical scheme is developed to solve the Cauchy momentum equations and nonlinear constitutive equations. The location of the yield surface, and velocity and stress components in both the sheared and unsheared regions are found as functions of the yield stress, rotation speed and Debye parameter. Numerical results are presented to reveal that the system rotation and yield stress may counteract each other in controlling the resultant flow rate and flow direction. The effect of yield stress may even be reversed for a sufficiently large rotation speed.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/colsurfa-
dc.relation.ispartofColloids and Surfaces A: Physicochemical and Engineering Aspects-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleRotating electroosmotic flow of viscoplastic material between two parallel plates-
dc.typeArticle-
dc.identifier.emailNg, CO: cong@hku.hk-
dc.identifier.authorityNg, CO=rp00224-
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.colsurfa.2016.10.066-
dc.identifier.hkuros271007-
dc.identifier.volume513-
dc.identifier.spage355-
dc.identifier.epage366-
dc.identifier.isiWOS:000390365500042-
dc.publisher.placeNetherlands-

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