Fig. 3: High-speed imaging reveals the migration behavior of individual particles observed in the channel side view.
From: Mapping inertial migration in the cross section of a microfluidic channel with high-speed imaging
a Stacked bright field images capturing migration trajectories of four representative particles (P5, P6, P7, and P8). The channel height expanded to 30 μm due to the fluid pressure in these experiments. A frame rate of 30,000 and exposure of 1 μs were used to acquire images. b–e Measurements of the downstream velocity and vertical position as a function of the downstream position for the four particles in panel a. Insets graphically illustrate the inferred migration paths (pink) within the channel cross section, where the grayscale indicates the approximate downstream fluid velocity magnitude. The dotted red lines indicate the channel entrance length required for full flow development
