Study on the motion characteristics of a single droplet impacting stationary wall based on the pseudopotential MRT-LBM model

Abstract The MRT-LBM pseudopotential model with large density ratio with adjustable surface tension was used to simulate the motion process of single droplet hitting the stationary wall, and the influence of Reynolds number, Weber number and Bond number on the motion characteristics of the droplet was analyzed. The accuracy of the model is verified from multiple angles. The results show that the increase of Reynolds number and Weber number is conducive to the increase of droplet spreading diameter, maximum spreading factor and dimensionless height in the droplet spreading stage, the difference is that the increase of Reynolds number and Weber number leads to the increase of droplet spreading time, while the increase of Bond number cannot change the droplet spreading time. During the movement of the droplet, Webb counts too little, and "ring-shaped" droplets appear in the droplet retraction stage, and Webb counts too little, and the droplets cannot be retracted after spreading, but directly fragment into small droplets.