Japan Geoscience Union Meeting 2018

Presentation information

[EE] Oral

A (Atmospheric and Hydrospheric Sciences) » A-OS Ocean Sciences & Ocean Environment

[A-OS12] Continental-Oceanic Mutual Interaction: Planetary scale Material Circulation

Tue. May 22, 2018 9:00 AM - 10:30 AM 106 (1F International Conference Hall, Makuhari Messe)

convener:Yosuke Alexandre Yamashiki(Earth & Planetary Water Resources Assessment Laboratory Graduate School of Advanced Integrated Studies in Human Survivability Kyoto University), Yukio Masumoto(Graduate School of Science, The University of Tokyo), Swadhin Behera(Climate Variation Predictability and Applicability Research Group, Application Laboratory, JAMSTEC, 3173-25 Showa-machi, Yokohama 236-0001, 共同), Takanori Sasaki(Department of Astronomy, Kyoto University), Chairperson:Yamashiki Yosuke(GSAIS Kyoto University), Swadhin Behera(JAMSTEC)

9:15 AM - 9:30 AM

[AOS12-02] 3D debris flow simulations by smoothed particle hydrodynamics (SPH) method

*Shoji Ueta1, Natsuki Hosono2, Yosuke Alexandre Yamashiki1 (1.Kyoto University, 2.JAMSTEC)

Keywords:debris flow, simulation, smoothed particle hydrodynamics

Yamashiki et al. (2012) and Yamashiki et al. (2013) perform laboratory experiments that represent a debris flow. We use smoothed particle hydrodynamics (SPH), Lagrangian numerical hydrodynamics method, and reproduce the experiments by 2D simulations. We find that water does not erode rock

by using same size particles between water and rock, but that water can erode rock by using smaller size water particles than rock particle. We try to extend this 2D simulation to 3D one and will reproduce more realistic results.
Also, debris flows include not only rock and water but mud. We developed a 2D SPH code which includes the solid-liquid mutual interaction with fully SPH manner to deal with multiphase flow well. We compare the results of the code with the results of a land slide experiment and some simulations in Igarashi et al. (2012) and find that we can get the results similar to those of experiments. We also succeed to extend the code to 3D one and prepare to perform more realistic debris flow simulations.