239 液滴と固体の衝突現象の数値解析(S41-1 移動境界・連成(1),S41 移動境界・連成・振動と騒音問題)  [in Japanese] 239 Coupled Analysis of High-Speed Impact Phenomena between Droplet and Solid  [in Japanese]

A coupled numerical simulation of gas-liquid two-phase fluid and structure was carried out in order to clarify the erosion mechanism caused by the impact of high-speed droplet Trie present method, which combines a gas-liquid two-phase flow analysis method using local homogeneous model and an elastic wave analysis method based on elastodynamics, was developed. Since the present method for elastodynamics is based on a compressible fluid analysis technique, it is seemed to be appropriate the fluid structure interaction (FSI) problems. In this study, the numerical simulation about a high-speed droplet impacts on the mild-steel surface was carried out. As a result the maximum von Mises equivalent stress is obtained about 380MPa in solid material after droplet impact, and it is indicated that the present method can behavior the yielding behavior.