%0 Journal Article %A DONG Ruo-Ling %A PENG Shuang-Shuang %A SHI Hong-Hui %A SHI Shun %A ZHANG Yi-Xin %T 2D and 3D numerical study on the interaction of shock wave and sub-millimeter water droplet %D 2022 %R 10.12034/j.issn.1009-606X.221240 %J The Chinese Journal of Process Engineering %P 1061-1073 %V 22 %N 8 %X The interaction of droplets with a shock wave widely exists in the fields of aerospace and fire fighting. And droplet breaking is the key process. At present, the initial diameter of droplet breakup is mainly at the millimeter level, and the research work on numerical study of sub-millimeter droplet deformation and breakup is still insufficient. For the purpose of studying the interaction process of sub-millimeter droplets with a shock wave, based on the existing experimental results, this work used VOF (Volume of Fluid) multiphase flow model and k-ε turbulence model to analyze the motion parameters of droplets in time and space. The influence of different Weber number (We) on the deformation and evolution of sub-millimeter droplets was analyzed by two-dimensional numerical simulation, and the explosive breaking mechanism of sub-millimeter droplets was revealed by three-dimensional numerical simulation. The results showed that Weber number can promote droplet deformation, and the greater the Weber number, the shorter the time required for droplet compression deformation. In the process of compression deformation, the dimensionless transverse deformation width of droplets with different crushing modes changed linearly with dimensionless time. Under the condition of constant aerodynamic force, the centroid acceleration of sub-millimeter droplets in the same crushing mode was inversely proportional to the initial diameter of droplets. The lateral spreading rate of droplets decreased with the increase of Weber number at low Weber number, while increased with the increase of Weber number at high Weber number. The breaking mechanism of sub-millimeter droplet explosive breaking mode was shear-induced entrainment mechanism. The numerical simulation results in this work were close to the comparative experimental results, which effectively illustrated the effect of Weber number on sub-millimeter droplet deformation. %U https://www.jproeng.com/EN/10.12034/j.issn.1009-606X.221240