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.
- Fluids Engineering Division
Computational Analysis of Effective Microfluidic Mixing Utilizing Surface Heterogeneity Effects
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Rahman, MA, Heidrick, T, & Fleck, B. "Computational Analysis of Effective Microfluidic Mixing Utilizing Surface Heterogeneity Effects." Proceedings of the ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. Volume 1: Symposia, Parts A and B. Miami, Florida, USA. July 17–20, 2006. pp. 1125-1127. ASME. https://doi.org/10.1115/FEDSM2006-98564
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