Characteristic of the jet post drop impact on a liquid at different depths

We study the liquid entering the jet after the impact of a drop on a liquid with different depths. Our findings reveal that the composition and growth of the jet are primarily governed by the depth of the underneath liquid. For the larger pool depth, the jet is thick with a substantial portion originating from the pool and a thin layer near the interface coming from the drop. Conversely, for small pool depths, the jet is thinner, with the major contribution coming from the drop itself. At long time, we observe a change in the jet dynamics, with the appearance of surface waves between the base of the jet and the drop, when the pool depth is small. These waves prevent further particles in the drop from entering the jet, leading to its axial thinning and a subsequent detachment.