Fig. 11 presents a schematic diagrams of two micromixers with different locations of gaps and baffles for comparison with the default case proposed in this paper. The gaps G1 and G2 in the micromixer are located on opposite sides of the y axis, as seen in Fig. 11, called micromixer A. The geometric parameters are same as the default structure. In Fig. 11, all the parameters of micromixer B are in accord with the default case, except for the locations of baffles B2 and B3. The two baffles contact with the wall on the opposite side of the y axis. The width of the center gap between B2 and B3 is equal to the sum of the width of three gaps in the default case.