Visualization of the Fine Perturbation Structure of a Liquid Surface by Flows Induced by a Drop Impact

Abstract

Using the methods of high-resolution photo- and video recording, this work studied the fine structure of the flows in the cavity center and on the growing splash tip, which disturb the smooth surface of the liquid after the crown falls. The surface geometry reflects the complexity of the pattern of fine flows in the near-surface fluid layer. The geometrical parameters of the structure formed by smooth spikes separated by thin depressions are determined. The structure formation is associated with the action of various exchange mechanisms between the kinetic, potential, and internal energy in a fluid with a free surface.