Fine Structural Components of the Drop Splash

The fine structures of the spreading of a substance of free drop falling into a deep liquid are studied by photo registration with high spatial and temporal resolutions. More than 500 experiments are performed in a wide range of basic dimensional parameters as a result. A discrete distribution of the droplet substance over the deformed surface of the target liquid for miscible liquids and a uniform distribution for immiscible ones are shown. The discrete pattern is formed by a set of fine filaments, namely, ligaments formed by droplet substance. A general scheme for the spreading of a droplet substance is proposed for the case of interaction of miscible liquid pairs. Effects of Weber and Ohnesorge numbers, the relative difference in surface tension coefficients, and the bottom topography on the flow pattern structure are defined.