Figure 1 Schematic diagram of the experimental apparatus
The drop breakup experiments under drop swarm were carried out in a
stirred tank. The Rushton Turbine (RT) impeller was used to disperse the
immiscible two phases. The schematic diagram of the apparatus is shown
in Figure 1. Key parameters of the setup are presented in Table 1. A
high-speed online camera (Olympus i-Speed TR) connecting with a
microscope (Olympus SZ61) was used to observe and record drop breakup
processes. The recording rate was fixed as 5000 frames per second and
the magnification of the microscope was adjusted between 0.67 and 1.2,
enabling the resolution of the captured image of 0.010-0.018 mm/pixel.
In this work, the diameter of the broken droplet is typically larger
than 0.2 mm, which means that the settings above can adequately capture
the droplet profile.