LAUSR

Abstract 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.