The impact of perfluorocarbon liquid drop onto a water pool

The impact of a drop onto a liquid pool portrays a plethora of interesting fluid-dynamical phenomena, from ejecta sheets to regular Edgerton crowns and Worthington jets. When the drop has different composition than the pool, even more intricate forms can emerge. Herein we use high-speed cameras to image the impact of a heavy perfluorocarbon liquid drop onto a water-pool. The two liquids are immiscible and the drop is much heavier than water. We focus on crater evolution, the formation of an internal air cylinder and the entrapment of a small bubble inside the drop during the crater-collapse. We also show the formation of fine Worthington jets.