TY - JOUR AB - Purpose The purpose of this study is to provide a micromixer for achieving effective mixing of two liquids. The mixing of two liquids is difficult to achieve in microfluidic chips because they cannot form turbulence at small dimensions and velocities.Design/methodology/approach In this paper, four kinds of passive micromixers based on splitting–recombination and chaotic convection are compared. First, a better E-shape mixing unit based on the previous F-shape mixing unit has been designed. Then, the E-shape mixing units are further combined to form three micromixers (i.e. E-mixer, SESM and FESM).Findings Finally, the mixing experimental results show that the mixing indexes of E-mixer, SESM and FESM are more than those of F-mixer when the Reynolds number range is from 0.5 to 100. And at Re = 15, the lowest mixing index of E-mixer is 71%, which is the highest of the four micromixers.Originality/value At Re = 80, the highest mixing index of F-mixer and E-mixer is 92 and 94 per cent, respectively, and then it begins to decrease. But the mixing index of SESM and FESM remains close to 100 per cent. VL - 38 IS - 3 SN - 0260-2288 DO - 10.1108/SR-04-2017-0054 UR - https://doi.org/10.1108/SR-04-2017-0054 AU - Chen Xueye AU - Shen Jienan AU - Hu Zengliang PY - 2018 Y1 - 2018/01/01 TI - Fabrication and performance evaluation of two multi-layer passive micromixers T2 - Sensor Review PB - Emerald Publishing Limited SP - 321 EP - 325 Y2 - 2024/03/28 ER -