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Conference Paper: Numerical study on the slip effect of the non-Newtonian electroosmotic flow in microchannels

TitleNumerical study on the slip effect of the non-Newtonian electroosmotic flow in microchannels
Authors
Issue Date2014
PublisherHong Kong Society of Theoretical and Applied Mechanics (HKSTAM).
Citation
The 18th Annual Conference of Hong Kong Society of Theoretical and Applied Mechanics (HKSTAM) & the 10th Shanghai-Hong Kong Forum on Mechanics and Its Application, Hong Kong, China, 15 March, 2014. In the Proceedings of The 18th Annual Conference of HKSTAM & the 10th Shanghai-Hong Kong Forum on Mechanics and Its Application, 2014, p. 34 How to Cite?
AbstractThe last few decades have witnessed the increasing interest in the electroosmotic flow due to its widely applications (H.C. Chang, L.Y. Yeo (2010)). Most existing works are limited to the problems with constant slip boundaries or Newtonian fluid flow. No works have been done to the combined effect of variable hydrodynamic slip and fluid rheological behaviour on the electrokinetic flow. In the paper, the power-law electroosmotic flow in microchannels with variable boundary slip conditions is numerical simulated by the lattice Boltzmann method (Z.H. Chai, T.S. Zhao (2012)), how the Debye length, the power law index, the slip distributions on the channel boundaries affect the fluid flow involved is studied. The following conclusions can be obtained: (1) The slip contributes more to the flow flux when the power law index increases or the Debye length decreases in the variable boundaries slip cases (Fig. 1(a)); (2) The larger boundary slip area on the boundaries means larger flow flux, the larger power law index leads to the smaller flow flux compared with the constant boundary slip cases (Fig.1(b)); In the meantime, the flow flux difference between cases with different boundary slip areas seems larger when the index increases; (3) the larger boundary slip oscillation frequency leads to the smaller the flow flux. The effect of the frequency is more apparent when the power law index increases.
DescriptionSession C1
Persistent Identifierhttp://hdl.handle.net/10722/195940

 

DC FieldValueLanguage
dc.contributor.authorLu, Jen_US
dc.contributor.authorNg, COen_US
dc.contributor.authorLi, Sen_US
dc.date.accessioned2014-03-21T02:25:22Z-
dc.date.available2014-03-21T02:25:22Z-
dc.date.issued2014en_US
dc.identifier.citationThe 18th Annual Conference of Hong Kong Society of Theoretical and Applied Mechanics (HKSTAM) & the 10th Shanghai-Hong Kong Forum on Mechanics and Its Application, Hong Kong, China, 15 March, 2014. In the Proceedings of The 18th Annual Conference of HKSTAM & the 10th Shanghai-Hong Kong Forum on Mechanics and Its Application, 2014, p. 34en_US
dc.identifier.urihttp://hdl.handle.net/10722/195940-
dc.descriptionSession C1-
dc.description.abstractThe last few decades have witnessed the increasing interest in the electroosmotic flow due to its widely applications (H.C. Chang, L.Y. Yeo (2010)). Most existing works are limited to the problems with constant slip boundaries or Newtonian fluid flow. No works have been done to the combined effect of variable hydrodynamic slip and fluid rheological behaviour on the electrokinetic flow. In the paper, the power-law electroosmotic flow in microchannels with variable boundary slip conditions is numerical simulated by the lattice Boltzmann method (Z.H. Chai, T.S. Zhao (2012)), how the Debye length, the power law index, the slip distributions on the channel boundaries affect the fluid flow involved is studied. The following conclusions can be obtained: (1) The slip contributes more to the flow flux when the power law index increases or the Debye length decreases in the variable boundaries slip cases (Fig. 1(a)); (2) The larger boundary slip area on the boundaries means larger flow flux, the larger power law index leads to the smaller flow flux compared with the constant boundary slip cases (Fig.1(b)); In the meantime, the flow flux difference between cases with different boundary slip areas seems larger when the index increases; (3) the larger boundary slip oscillation frequency leads to the smaller the flow flux. The effect of the frequency is more apparent when the power law index increases.-
dc.languageengen_US
dc.publisherHong Kong Society of Theoretical and Applied Mechanics (HKSTAM).en_US
dc.relation.ispartofAnnual Conference of Hong Kong Society of Theoretical and Applied Mechanics & Shanghai-Hong Kong Forum on Mechanics and Its Applicationen_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleNumerical study on the slip effect of the non-Newtonian electroosmotic flow in microchannelsen_US
dc.typeConference_Paperen_US
dc.identifier.emailLu, J: lujh@hku.hken_US
dc.identifier.emailNg, CO: cong@hku.hken_US
dc.identifier.authorityNg, CO=rp00224en_US
dc.description.naturepublished_or_final_version-
dc.identifier.hkuros228313en_US
dc.identifier.spage34en_US
dc.identifier.epage34en_US
dc.publisher.placeHong Kong, China-

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