Computational analysis of effective microfluidic mixing utilizing surface heterogeneity effects

Azizur Rahaman, T. Heidrick, B. Fleck

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The present work is a numerical simulation of electroosmotic flow (EOF) in a cylindrical microchannel with the variation of wall surface charge (ζ-potential) distributions. The 2D Navier-Stoke equation governing the velocity field and the pressure are solved numerically using the finite element method (FEM). The numerical results show that the distorted electroosmotic velocity profiles and various kinds of flow circulation resulting from the axial variation of the ζ. The influences of heterogeneous patterns of zeta potential on the velocity profile, and the induced pressure distribution are discussed in this paper. This study shows that using heterogeneous patterns of zeta potential over the channel can generate local flow circulations and hence provide effective means to improve the mixing within the microchannels.

Original languageEnglish
Title of host publicationProceedings of ASME Fluids Engineering Division Summer Meeting 2006, FEDSM2006
Pages1125-1127
Number of pages3
Volume1 SYPMOSIA
Publication statusPublished - 2006
Externally publishedYes
Event2006 ASME Joint U.S.- European Fluids Engineering Division Summer Meeting, FEDSM2006 - Miami, FL, United States
Duration: 17 Jul 200620 Jul 2006

Other

Other2006 ASME Joint U.S.- European Fluids Engineering Division Summer Meeting, FEDSM2006
CountryUnited States
CityMiami, FL
Period17/7/0620/7/06

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Keywords

  • Electrical double layer
  • Electroosmotic flow
  • Microchannel
  • Surface heterogeneity
  • Zeta potential

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Rahaman, A., Heidrick, T., & Fleck, B. (2006). Computational analysis of effective microfluidic mixing utilizing surface heterogeneity effects. In Proceedings of ASME Fluids Engineering Division Summer Meeting 2006, FEDSM2006 (Vol. 1 SYPMOSIA, pp. 1125-1127)