Abstract
Collapsing stage of cloud cavity and resulting violent shock pressure have been investigated by many researchers, because the knowledge of cavitation erosion is of practical importance and the dynamics is one of the most challenging problems in the field of two-phase flow. When a researcher intends to investigate the phenomenon numerically or experimentally, he or she must know the structure of the cloud cavity. The authors investigate cloud cavity, employing an off-axis laser holography system. This paper is a brief report concerning the inner structure of cloud cavity on a foil section.
