Abstract：High-speed digital video processing was used to measure the motion of bubble swarm in water, 20% glycerol-water and 40% glycerol-water mixture under the uniform bubble flow state, respectively. The effects of gas holdup, Reynolds number and distributor aperture on the bubble size and shape, bubble velocity and drag coefficient were investigated. The cubic cell model was established and the laminar flow model and turbulent flow model were selected according to the different Reynolds number to simulate the motion of the bubble swarm. The results showed that the numerical rise velocity and the drag coefficient of the bubbles were in good agreement with the experimental data. The rise resistance of the bubble swarm increased and the rise velocity decreased with the increase of gas holdup and liquid viscosity. With the increase of the Reynolds number and the bubble equivalent diameter, the bubble swarm drag coefficient decreased and the rise velocity increased. It is suggested that the cell model can well reflect the influences of various factors in the process of the bubble swarm motion and it is an effective tool to deal with the movement of the bubble swarm.
Zhou Xiaolin,Tian Zhen,Wang Lijun et al. Experiment and Numerical Simulation of the Motion of Bubble Swarm in a Bubble Column[J]. 化学反应工程与工艺, 2016, 32(6): 481-489.
