FLUID MOTION DURING BUBBLE BURSTING PROCESSES IN PURE AND SEA WATER

Abstract

 We investigated on a series of bubble bursting processes, including a formation of a rim bounding liquid film on a bubble cap, extension of the hole on the film, evolution of concentric vertical jet, on the basis of high-speed micro image measurements. We also discussed linear stability of the motion of the rim on the flim, causing a formation of fingers on the rim and generation of film drops. The ascending velocity of the concentric vertical jet, produced after collaps of the bubble cap, and the drop diameters are parameterized in terms of Bond, Laplace and capillary numbers. The effects of surfactant to the parameterization are discussed through the experiments using purified water and seawater.