Physical Mechanisms for Forming Finger Jets and Sprays

Abstract

Splashing water jets produces numbers of sprays and finger-shaped secondary jet. In this study, they were visualizedusing a fluorescent imaging technique. It is found two mechanisms for forming sprays determine fundamental featuresof spray distributions and transport velocity:(A) ejection of sprays due to moving contacts between the splashing jet andreceiving water surface, and (B) fragmentation of finger jets into sprays through a surface tension instability. The spraysformed in (A), transported at high speeds, precede those formed in (B). Size distributions of the finger jets and sprays are found to be approximated by log-normal distributions.