On the Morphodynamics of a Wide Class of Large Scale Meandering Rivers: Insights Gained by Coupling LES With Sediment Dynamics
文献类型：期刊论文
| 作者 | Khosronejad, Ali; Limaye, AjayB.B.; Zhang, Zexia; Kang, Seokkoo5; Yang XL(杨晓雷) ; Sotiropoulos, Fotis2
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| 刊名 | JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
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| 出版日期 | 2023-03 |
| 卷号 | 15期号:3 |
| 关键词 | large eddy simulation morphodynamics meandering river sediment transport turbulence |
| DOI | 10.1029/2022MS003257 |
| 英文摘要 | In meandering rivers, interactions between flow, sediment transport, and bed topography affect diverse processes, including bedform development and channel migration. Predicting how these interactions affect the spatial patterns and magnitudes of bed deformation in meandering rivers is essential for various river engineering and geoscience problems. Computational fluid dynamics simulations can predict river morphodynamics at fine temporal and spatial scales but have traditionally been challenged by the large scale of natural rivers. We conducted coupled large eddy simulation and bed morphodynamics simulations to create a unique database of hydro morphodynamic data sets for 42 meandering rivers with a variety of planform shapes and large scale geometrical features that mimic natural meanders. For each simulated river, the database includes (a) bed morphology, (b) three dimensional mean velocity field, and (c) bed shear stress distribution under bankfull flow conditions. The calculated morphodynamics results at dynamic equilibrium revealed the formation of scour and deposition patterns near the outer and inner banks, respectively, while the location of point bars and scour regions around the apexes of the meander bends is found to vary as a function of the radius of curvature of the bends to the width ratio. A new mechanism is proposed that explains this seemingly paradoxical finding. The high fidelity simulation results generated in this work provide researchers and scientists with a rich numerical database for morphodynamics and bed shear stress distributions in large scale meandering rivers to enable systematic investigation of the underlying phenomena and support a range of river engineering applications. |
| 分类号 | 一类 |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000951090000001 |
| 资助机构 | National Science Foundation Hydrology and Geomorphology and Land use Dynamics Program [EAR 0120914, EAR 1823530] ; U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under Water Power Technologies Office (WPTO) [DE EE0009450] ; Institute for Advanced Computational Sciences at Stony Brook University |
| 其他责任者 | Khosronejad, A (corresponding author), SUNY Stony Brook, Civil Engn Dept, Stony Brook, NY 11794 USA. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/91797]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.SUNY Stony Brook, Civil Engn Dept, Stony Brook, NY 11794 USA 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing, Peoples R China 3.Virginia Commonwealth Univ, Dept Mech & Nucl Engn, Richmond, VA USA 4.Hanyang Univ, Dept Civil & Environm Engn, Seoul, South Korea 5.Limaye, Ajay B. B.] Univ Virginia, Dept Environm Sci, Charlottesville, VA USA |
| 推荐引用方式 GB/T 7714 | Khosronejad, Ali,Limaye, AjayB.B.,Zhang, Zexia,et al. On the Morphodynamics of a Wide Class of Large Scale Meandering Rivers: Insights Gained by Coupling LES With Sediment Dynamics[J]. JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,2023,15(3). |
| APA | Khosronejad, Ali,Limaye, AjayB.B.,Zhang, Zexia,Kang, Seokkoo,杨晓雷,&Sotiropoulos, Fotis.(2023).On the Morphodynamics of a Wide Class of Large Scale Meandering Rivers: Insights Gained by Coupling LES With Sediment Dynamics.JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,15(3). |
| MLA | Khosronejad, Ali,et al."On the Morphodynamics of a Wide Class of Large Scale Meandering Rivers: Insights Gained by Coupling LES With Sediment Dynamics".JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS 15.3(2023). |
入库方式： OAI收割
来源：力学研究所
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