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- SHEN Dawei
- Dept. of Mechanical Eng., Institute of Science Tokyo
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- AOKI Takayuki
- Supercomputing Research Center, Institute of Integrated Research, Institute of Science Tokyo
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- WATANABE Seiya
- Research Institute for Applied Mechanics, Kyushu University
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- MORIGUCHI Shuji
- International Research Institute of Disaster Science, Tohoku University
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- TAKASE Shinsuke
- Dept. of Civil Engineering and Architecture, Hachinohe Institute of Technology
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- SAKURABA Masaaki
- Research and Development Center, Nippon Koei Co., Ltd.
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説明
<p> Severe damage from river flooding carrying driftwood has become a critical problem. We have developed a code for 3-D simulations of water flows carrying a lot of driftwood by using the cumulant lattice Boltzmann method (LBM) coupled with the discrete element method (DEM). Adaptive mesh refinement (AMR) makes it possible to apply the code to large areas with a high-resolution mesh, and a GPU implementation greatly accelerates the computation. A small-scale water-tank experiment with a driftwood model showed that the computational results were in good agreement with the experiment results. For an actual river-flooding disaster that occurred on the Omoto River in Iwate Prefecture, Japan, we conducted two large-scale computations of large areas with a total of 1000 pieces of driftwood and a maximum resolution of 7.8125 [cm]. The simulation results identified three driftwood accumulation processes: trapping in narrow channels, hitting building corners, and stagnation in front of buildings.</p>
収録刊行物
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- Journal of JSCE
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Journal of JSCE 12 (1), n/a-, 2024
公益社団法人 土木学会
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詳細情報 詳細情報について
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- CRID
- 1390302569387297024
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- ISSN
- 21875103
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
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- 抄録ライセンスフラグ
- 使用不可
