1999 Volume 15 Pages 375-380
When the overturning jet of broken wave hits a wall of coastal structure such as a breakwater, the impact force acts on the structure, which often give a great damage to the structure. Although there have been many reports on the impact force, little is known about the quantitative properties of the force and velocity fluctuation in time. In this paper, the plunging jet attacking to the structure was numerically solved by the direct numerical scheme with the high level of accuracy. The correlations between the surface profiles, the direction of fluid velocity and the pressure were also discussed through the investigations of spatial and temporal changes of them.
