颗粒击穿气泡时气泡的变形和破裂

Deformation and Bursting of Bubbles When Particles Break Through Bubbles

通过高速摄像机拍摄研究了颗粒击穿半球气泡破碎的演变过程.观察并分析了气泡成型后边缘再生和对流情况、受到颗粒击穿时气泡破碎的概率、以及成孔后的气泡破碎行为.通过量纲分析以及实验研究发现,气泡破碎概率是雷诺数和韦伯数的函数,概率P=1.08(Re^(0.5)We^(0.25))^(0.664),且当Re^(0.5)We^(0.25)>1020时,概率升至100%,气泡破碎形成的不稳定性射流数量是奥内佐格数Oh的函数.气泡液膜的卷曲速度随溶液浓度提高而升高,气泡液厚度随浓度提高而减小.

The evolution of the particle‑induced hemispherical bubble bursting process is invistigated using high‑speed camera filming.The edge regeneration and convection after bubble formation,the probability of bubble bursting when subjected to particle penetration,and the bubble bursting behavior after hole formation are observed and analyzed.Through dimensional analysis and experimental research,it is found that the probability of bubble breaking probability is a function of Reynolds number and Weber number.The probability is given by P=1.08(Re^(0.5)We^(0.25))^(0.664),and the probability is reaches to 100%when Re^(0.5)We^(0.25)>1020.The number of ligaments formed by bubble bursting is a function of the Oh number.The rim receding velocity of the bubble liquid film increases with the concentration of the solution increases and the film thickness decreases with the concentration increases.