Abstract
To clear the time-dependent feature of the cavity in a submerged water jet, we study the high-speed behavior of the cavity development process from the free surface to the surface of the test specimen, by means of a high-speed video camera and the VOF-simulation method. It is found that after the water jet impacts on the free surface, the submerged jet forms a cavity, whose configuration is similar to a line like a string of beads within a limited time, and the time series of the cavity aspect correspond to those simulated by VOF method.
