INSIGHT INTO AN EFFICIENT MICROMIXER WITH STAGGER ABREAST BAFFLES

Hangda Xie, Ling Wang and Xueye Chen
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Hangda Xie: Faculty of Mechanical Engineering and Automation, Liaoning University of Technology, Jinzhou, Liaoning 121001, P. R. China
Ling Wang: ��School of Business, Linyi University, Linyi, Shandong 276000, P. R. China
Xueye Chen: ��College of Transportation, Ludong University, Yantai, Shandong 264025, P. R. China

Surface Review and Letters (SRL), 2022, vol. 29, issue 08, 1-9

Abstract: Passive micromixers utilize no external energy input. It mainly depends on the structure change of microchannel to produce chaotic convection effect, which increases the contact surface and contact time between the fluid. The mixing efficiency of stagger non-abreast baffles (SNB) micromixer and stagger abreast baffles (SAB) micromixer is compared at five kinds of Reynolds (Res). It may affect the mixing efficiency including the height (H) and number (n) of baffles, the distance between two adjacent baffles, non-abreast baffles, and abreast baffles. As the θ of the baffles changes, it contributes to enhance the chaotic convection of the micromixer. When Re =1, the worst mixing efficiency of the most efficient seven SABs (θ=15∘, H=0.09 mm, D=0.60 mm, n=7) micromixer reaches an astonishing 98%. The concentration change along the microchannel is studied in this paper. At low Re, SAB makes fluid contact zigzag in microchannel and enhances molecular diffusion. At high Re, SAB causes chaotic convection in the microchannel and completes the mixing quickly.

Keywords: Stagger abreast baffles; High-efficiency; Chaotic convection; Micromixer (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218625X22501128

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