Document Type

Article

Publication Date

2021

DOI

10.3390/mi12040431

Publication Title

Micromachines

Volume

12

Issue

4

Pages

431 (1-11)

Abstract

This paper investigates the electroosmotic micromixing of non-Newtonian fluid in a microchannel with wall-mounted obstacles and surface potential heterogeneity on the obstacle surface. In the numerical simulation, the full model consisting of the Navier–Stokes equations and the Poisson–Nernst–Plank equations are solved for the electroosmotic fluid field, ion transport, and electric field, and the power law model is used to characterize the rheological behavior of the aqueous solution. The mixing performance is investigated under different parameters, such as electric double layer thickness, flow behavior index, obstacle surface zeta potential, obstacle dimension. Due to the zeta potential heterogeneity at the obstacle surface, vortical flow is formed near the obstacle surface, which can significantly improve the mixing efficiency. The results show that, the mixing efficiency can be improved by increasing the obstacle surface zeta potential, the flow behavior index, the obstacle height, the EDL thickness.

Comments

This is an open access article distributed under the Creative Commons Attribution 4.0 International License (CC BY 4.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Original Publication Citation

Mei, L., Cui, D., Shen, J., Dutta, D., Brown, W., Zhang, L., & Dabipi, I. K. (2021). Electroosmotic mixing of non-newtonian fluid in a microchannel with obstacles and zeta potential heterogeneity. Micromachines, 12(4), 1-11, Article 431. https://doi.org/10.3390/mi12040431

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