Figure 5.

Trajectories of 5 μm and 15 μm particles at the outlet of each stage. (a) 15 μm particles focus near the inner wall in the bifurcation of the first stage trapezoidal spiral channel with a flow rate of 1.3 mL/min. (b) 15 μm particles focus in the center of the second stage serpentine channel and 5 μm particles focus at the sides with a flow rate of 600 μL/min. (c) 15 μm particles focus near the inner wall in the bifurcation of the first stage trapezoidal spiral channel and 5 μm particles focus at the sides with a flow rate of 200 μL/min.