Fine Structure of Substance Distribution of a Compound Drop in the Target Fluid in the Splash Formation Mode

The evolution of the regular fine structure of the colored substance distribution pattern during the spreading of a freely falling compound drop in deep water is traced for the first time using technical photo and video recording methods. The flow pattern is studied at the initial stage of the formation of the cavity and crown during the merger of a compound drop, whose core, a drop of alizarin ink solution, is covered with an oil shell. Banded structures are observed in the distribution of the colored liquid at the bottom of the cavern and the walls of the crown. The formation of banded elements of the flow pattern is associated with the influence of the processes of conversion of the available potential surface energy (APSE) during the destruction of the contact surfaces of the merging liquids. The position of the nucleus in the drop is not controlled and is determined by the formation conditions. The breakdown of the ink core into fibers is observed in all experiments in this series. The area of coverage of the surface of the cavity and the crown with the colored liquid reach a maximum at the central position of the core.