Numerical simulation of the crossing of a liquid-liquid interface by a droplet

Numerical simulations are used to investigate the passage of a droplet through a liquid-liquid interface in the tailing configuration until the breakup of the column, leading to the drop encapsulation. Conditions required for the droplet to cross the interface are discussed. Scaling laws of both the length of the entrained column and the volume of the encapsulating film are proposed, primarily dependent on inertial parameters and exhibiting a strong influence of the drop-to-film viscosity ratio.