Three-dimensional numerical simulation of tandem droplets accelerated by continuous uniform airflow

We simulate the dynamics of tandem double droplets accelerated by uniform airflow. The deformation of the tandem droplets under different dimensionless parameters has been studied. The shape of the droplets is influenced by the vortex structure in the recirculation zone and the Rayleigh-Taylor instability (RTI). Decreasing the Reynolds number and the relative distance between droplets, as well as increasing the liquid/gas density ratio, increases the inhibitory effect of the leading droplet on the deformation of the trailing droplet. Finally, a predictive model was proposed to describe the temporal evolution of the radius of tandem droplets.