Numerical Simulation on Cavity Evolution During High-speed Droplets Impingement on the Wall

In this work, a numerical investigation of high-speed droplet impingement on solid wall was carried out based on the compressible two-phase flow model considering the instantaneous phase transition procedure. The results showed that a series of flow phenomena, including the impinging water hammer shock, the reflected rarefaction waves, and the cavity inception as well as its evolution, were well consistent with the experimental results of high-speed (110 m/s) droplet impingement. In addition, the droplet of higher initial speed (150 m/s) was further simulated to investigate the inuence of initial impinging speed on the cavity evolution inside a droplet.