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Effect of surface property on mass flux in a variable-section microchannel
Xu, Weicheng1,2; Yong, Yumei1; Xu, Junbo1; Yang, Chao1,2

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. (C) 2016 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.

KeywordHydrophobic Surface Boundary Slip Complex Microchannel Lattice Boltzmann Method
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordLattice Boltzmann Method ; Apparent Slip ; Hydrophobic Microchannels ; Carbon Nanotubes ; Boundary Slip ; Simulation ; Model ; Flow ; Walls
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Key Research and Development Program(2016YFB0301701) ; National Natural Science Foundation of China(21276256 ; 21490584 ; 91534105)
WOS IDWOS:000402913500003
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, State Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xu, Weicheng,Yong, Yumei,Xu, Junbo,et al. Effect of surface property on mass flux in a variable-section microchannel[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2017,25(4):401-407.
APA Xu, Weicheng,Yong, Yumei,Xu, Junbo,&Yang, Chao.(2017).Effect of surface property on mass flux in a variable-section microchannel.CHINESE JOURNAL OF CHEMICAL ENGINEERING,25(4),401-407.
MLA Xu, Weicheng,et al."Effect of surface property on mass flux in a variable-section microchannel".CHINESE JOURNAL OF CHEMICAL ENGINEERING 25.4(2017):401-407.
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