The influence of bubble size on critical detachment flow field parameters of bubble-particle aggregate in an isotropic turbulence field: Experiment and simulation

被引：0
作者：
Shi, Wenqing [1 ,2 ]
Chen, Hongji [1 ,2 ]
Ding, Shihao [1 ,2 ]
Gui, Xiahui [1 ]
Cao, Yijun [3 ]
Xing, Yaowen [1 ]
机构：
[1] China Univ Min & Technol, State Key Lab Coking Coal Resources Green Exploita, Xuzhou 221116, Peoples R China
[2] China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou 221116, Peoples R China
[3] Zhengzhou Univ, Key Met Henan Lab, Zhengzhou 450001, Peoples R China
来源：
POWDER TECHNOLOGY | 2025年 / 458卷
基金：
中国国家自然科学基金;
关键词：
Flotation; Bubble-particle detachment; Bubble size; Isotropic turbulence; CFD; SURFACE; LIQUID;
D O I：
10.1016/j.powtec.2025.120960
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Bubble plays an essential role in the flotation process, and their size has a significant impact on the bubbleparticle interaction. However, the critical fluid parameters for particle detachment from bubbles of different sizes remain unclear. To address this, an isotropic turbulent field was generated using a customized oscillating grid system, systematically investigating the influence of bubble size on critical detachment flow field parameters of bubble-particle aggregate in an isotropic turbulence field. Additionally, numerical simulations were employed to extract key fluid parameters within the oscillating grid system. The results indicate that the flow field exhibits a sinusoidal periodic variation with grid motion. A highly homogeneous isotropic turbulent field was generated in the central region of the tank, and both velocity and vorticity in this region increase with oscillation frequency. Through the analysis of the bubble-particle detachment dynamics, it was found that larger bubbles tend to detach more easily from the particle surface. Furthermore, the detachment process can be divided into three distinct stages: bubble sliding, bubble shrinkage, and bubble necking rupture. Finally, based on experimental and
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页数：9
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