2010 Fiscal Year Final Research Report
Refinement of numerical model on flows and bed deformation around river hydraulic structure and its verification
| Project/Area Number |
20760327
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Hydraulic engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
ONDA Shinichiro Kyoto University, 工学研究科, 助教 (50402970)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 河川構造物 / 局所流 / 局所洗掘 / 数値シミュレーション |
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| Research Abstract |
Around river hydraulic structures such as a spur dike and a square cylinder, complex three-dimensional flow structures are predominant. Therefore, a simple depth averaged flow model is not applicable to such cases. In this study, a modeling of three-dimensional flow structures is carried out theoretically, and a depth averaged flow model is refined by incorporating the effects of secondary currents, flow acceleration/deceleration and vertical acceleration. The three-dimensional numerical simulation is also conducted to compare the numerical results. Applicability of the numerical model with equilibrium and non-equilibrium sediment transport models to the local scouring around a spur dike and river channel processes is examined.
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