TY - JOUR
TI - The motion and wake characteristics of bottom blowing coaxial double bubbles
AU - Zhao Yutang
AU - Zhang Xiaohui
AU - Tong Xinting
AU - Yu Xiaolv
AU - Luo Jing
AU - Fu Yanxiong
AU - Wang Hua
JN - Thermal Science
PY - 2024
VL - 28
IS - 5
SP - 3751
EP - 3763
PT - Article
AB - In the process of bottom blowing bath smelting, continuous bubbles are formed and rise in the melt after the bottom blowing gas is ejected. In order to reveal the motion behavior and wake characteristics of continuous bubbles formed during the injection process, the rising process of coaxial double bubbles is studied through numerical simulation, the velocity and deformation characteristics of coaxial double bubbles in the rising process are obtained. Based on the vortex identification reconstruction of the flow field, the characteristics of formation, evolution, and configuration of bubble wake are obtained. The results show that in terms of motion characteristics, the aspect ratio of the upper bubble is always less than 1, and lower bubble has a large span of change: the minimum is 0.85 and the maximum is 1.2. As the two bubbles approach, the aspect ratio of the upper bubble is always less than 1, while the maximum aspect ratio of the lower bubble can reach 1.2. In terms of wake characteristics, the vorticity on the upper bubble surface is larger. When the wake rotation centers of the upper and lower bubbles merge with each other, the instantaneous acceleration of the lower bubble reaches the maximum.