Effect of surface property on mass flux in a variable-section microchannel

Weicheng Xu; Yumei Yong; Junbo Xu; Chao Yang

doi:10.1016/j.cjche.2016.10.011

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Effect of surface property on mass flux in a variable-section microchannel

Separation Science and Engineering | Updated：2026-01-06

- Effect of surface property on mass flux in a variable-section microchannel
- Chinese Journal of Chemical Engineering Vol. 25, Issue 4, Pages: 401-407(2017)
- Affiliations：
  
  1. Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  2. University of Chinese Academy of Sciences,Beijing,China,100049
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.10.011
  CLC：
- Published：2017
- Accepted：
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Weicheng Xu, Yumei Yong, Junbo Xu, Chao Yang. Effect of surface property on mass flux in a variable-section microchannel[J]. , 2017, 25(4): 401-407.
DOI：

Weicheng Xu, Yumei Yong, Junbo Xu, Chao Yang. Effect of surface property on mass flux in a variable-section microchannel[J]. , 2017, 25(4): 401-407. DOI： 10.1016/j.cjche.2016.10.011.

摘要

Abstract

For microfluidic systems

interfacial phenomena in micro-reactors are of great importance because they control the transfer and reaction characteristics.This paper dwells on how the surface property and geometry influence the mass flux in a complex microchannel.The lattice Boltzmann method (LBM) with a pseudo potential model and the Shan-Chen model for the interaction between fluid and hydrophobic surface were built up

so a boundary slip effect was added and verified.On this basis

a microchannel with variable-section geometry was simulated.The results indicate that the optimal design and the flow pattern are quite different under hydrophilic and hydrophobic conditions.A microchannel with sequential hydrophilic and hydrophobic surface was also simulated.The numerical results indicate that the hydrophobic wall can improve the mass flux

irrespective of microchannel geometry.Particularly

an empirical correlation with a linearly relationship between length of hydrophobic segment and mass flux was obtained for the straight microchannel.

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