日本地球惑星科学連合2018年大会

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セッション記号 A (大気水圏科学) » A-OS 海洋科学・海洋環境

[A-OS12] 陸域海洋相互作用

2018年5月22日(火) 09:00 〜 10:30 106 (幕張メッセ国際会議場 1F)

コンビーナ:山敷 庸亮(京都大学大学院総合生存学館)、升本 順夫(東京大学大学院理学系研究科)、Behera Swadhin(Climate Variation Predictability and Applicability Research Group, Application Laboratory, JAMSTEC, 3173-25 Showa-machi, Yokohama 236-0001、共同)、佐々木 貴教(京都大学 大学院理学研究科 宇宙物理学教室)、座長:山敷 庸亮(京都大学大学院総合生存学館)、Swadhin Behera(海洋研究開発機構)

09:15 〜 09:30

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

*上田 翔士1細野 七月2山敷 庸亮1 (1.京都大学、2.JAMSTEC)

キーワード:土石流、シミュレーション、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.