Journal
CHEMICAL ENGINEERING SCIENCE
Volume 244, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2021.116816
Keywords
Passive micromixer; Multiple-vortex; Low Reynolds number; Convergence-divergence-splits; Reverse-collisions-recombination
Categories
Funding
- foundation for the construction of first-class research institutes in China by the Guangdong Academy of Sciences [2019GDASYL-0103016, 2021GDASYL-20210302002, 2017GDASCX-0103, 2020GDASYL-20200103040, 2019GDASYL-0402002]
- Natural Science Foundation of Guangdong Province [2019A1515011655]
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A novel two-dimensional passive micromixer was designed, fabricated, and characterized based on the concept of unbalanced convergence-divergence-splits and reverse-collisions-recombination of fluid streams, showing improved mixing performance. By introducing multiple-vortex and reverse-collisions-recombination, the micromixer achieved almost complete mixing and enhanced fabrication accuracy reliability, providing insights for microfluidic applications with complex structures.
Based on the concept of unbalanced convergence-divergence-splits and reverse-collisions-recombination of fluid streams, a novel two-dimensional (2D) passive micromixer was designed, fabricated, and characterized. We introduced its design and evaluated its performance in terms of the fluid dynamic and mixing performance. Multiple-vortex and reverse-collisions-recombination were generated to change fluid flow direction and enhance the mixing performance in the designed micromixer. Under the designed conditions, the designed micromixer achieved an almost complete mixing with a length of 10.5 mm at Re = 10.00. As compared to the traditional 2D modified Tesla micromixer, the mixing performance of the designed micromixer exhibited 20%, 35%, and 15% improvement at Re = 0.50, 1.25, and 10.00; the fabricating accuracy reliability had a significant improvement under the same fabrication conditions. This work not only presents a novel micromixer for various microfluidic applications but also provides insights into the improvement of fabricating accuracy reliability for the micromixer with complex structures. (c) 2021 Elsevier Ltd. All rights reserved.
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