Rotor-stator reactor (RSR)

an efficient mass transfer enhancer

has been applied in many fields. However

the hydrodynamic characteristics of liquid flow in RSR are still a mystery despite they are fundamental for the mass transfer performance and processing capacity. In view of the above

this paper studies the liquid-liquid flow and liquid holdup in RSR under various conditions with a high-speed camera. The paper firstly demonstrates two flow patterns and liquid holdup patterns that we obtained from our experiment and then presents in succession a flow pattern and a liquid holdup criterion for the transition of film flow to filament flow and complete filling to incomplete filling. It is found that experimental parameters

including rotor-stator distance

rotational speed and volume flow rate exert great influence on the average droplet diameter and size distribution. Besides

by comparison and contrast

we also find that the experimental values match well with our previous predicted calculations of the average diameter

and the relation between the average diameter and the mean energy dissipation rate.