2023 Fiscal Year Final Research Report
Development of advanced computational model for predicting flows and bed deformation in arbitrary curved channels
| Project/Area Number |
21K04272
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 22040:Hydroengineering-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 一般座標系 / 数値モデル / 表面流と浸透流 / 地形変化 |
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| Outline of Final Research Achievements |
With the increasing risk of water-related disasters, the development of advanced computational model to predict flood flows and bed deformation is of great importance in river engineering. In this study, a 3D numerical model is developed by combining a 3D flow model in a generalized curvilinear coordinate system that simultaneously predict surface and seepage flows and a sediment transport model. The numerical model was verified by applying the lateral overtopping flows in a curved channel, dam break flows on a porous bed, and flows in a curved channel, as well as riverbed deformation during bar formation in a meandering channel and levee breaching due to overtopping flows.
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| Free Research Field |
河川工学
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| Academic Significance and Societal Importance of the Research Achievements |
近年，水災害のリスクが高くなってきている中，洪水流の非定常的な挙動と地形変化を予測する高度な計算技術の開発は河川工学的に重要な課題である．その際，実際の河川では曲線形状を有していることから，河道に沿った一般座標系を用いることが有用である．本研究では，表面流と浸透流を同時に予測できる一般座標系での３次元流体解析モデルと土砂輸送モデルを組み合わせ，水際・河床近傍の複雑な流れの３次元性と土砂輸送特性を考慮した数値モデルの構築を行った．こうした数値解析モデルの開発，高度化は，適切な河道管理を検討する際のツールとして大きく貢献すると考えられる．
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