Figure 4From: A tracer liquid image velocimetry for multi-layer radial flow in bioreactors Gray images in processing windows of top views. M1 ~ 5: Injection position of tracer near middle area. U1 ~ 5, and D1 ~ 5: Injection position of tracer near two sides areas, respectively. Curves in M5, U5and D5 represented the pathlines of mass center.Back to article page