(General session) Mining and underground construction machineries / Rock Engineering / Resource based economy and social system / Mining technologies

[2401-08-07] [Student presentation: Master’s course]Research on the relationship between submarine landslides and tsunami by particle method

○Xinghao Jiao¹, Hitoshi Mikada¹, Junichi Takekawa¹, Shibo Xu¹ (1. Kyoto University)

Chairman:Atsushi Sainoki (Kumamoto University)

Keywords:landslide, tsunami, SPH-DEM, fluid-solid coupling algorithm

Submarine landslides and induced tsunamis are catastrophic and destructive geological disasters. They always result in devastating consequences. The generation process of the tsunami caused by submarine landslides is a complex interaction of fluid and solid phases, and traditional numerical approaches cannot describe it well. The Smooth Particle Hydrodynamics (SPH) and Discrete Element Method (DEM) coupled methods are correspondingly applied in the numerical model to analyze the coupling behavior between fluid and solid. Based on SPH, a density diffusion term is introduced to eliminate the numerical noise of the pressure field. In addition, the coupling of these two methods could feasibly tackle the interaction between fluid and solid, which can be effectively utilized for the simulation of the tsunami caused by submarine landslides. According to the research results of this study, the SPH-DEM coupling methods are applicable for simulating submarine landslides and tsunamis. They are possible as a fundamental study for analyzing the relationship between the submarine landslide and the tsunami.