A NUMERICAL MODELING OF GENERATION AND PROPAGATION OF WATER WAVE GENERATED BY LANDSLIDE

After the Papua New Guinea tsunami event, some researchers have studied the landslide-generated tsunami vigorously. However, useful numerical model for prediction considering granular motion has not been developed yet. In this study, a new numerical simulation model for analyzing liquid-solid flows with rapid and great water deformation is developed. The 3-D discrete element method and the 3-D volume of fluid method are used in the model for analyzing the granular motion and tracking the water surface respectively. After validation of the developed model by comparison with experimental results, some calculations for different initial locations of particles are conducted and the results are presented. Further wave generation process and wave propagation characteristics are discussed.