2011 Volume 67 Issue 2 Pages I_196-I_200
Tsunami due to sector collapse with volcanic activity does not occur frequently, however, has caused enormous damages. Because density of soil collapse distributes widely depending on its cause of generation, a process of impact into water which drives a tsunami is not simple. In this paper, experiments, in which particles with two kinds of density fall down on a slope and impact with a still water surface, are carried out, and two defferent processes of tsunami generation are confirmed. On the other hand, a solid-liquid two-phase flow model based on an accurate particle method are developed to execute numerical simulations for reproduction of these phenomena.