globalchange  > 气候减缓与适应
DOI: 10.1016/j.watres.2017.10.049
Scopus记录号: 2-s2.0-85032893265
论文题名:
Effects of roughness and permeability on solute transfer at the sediment water interface
作者: Han X.; Fang H.; He G.; Reible D.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 129
起始页码: 39
结束页码: 50
语种: 英语
英文关键词: Bed roughness ; Large Eddy Simulation ; Mass transfer coefficient ; Permeable bed ; Sediment water interface
Scopus关键词: Mass transfer ; Quay walls ; Reynolds number ; Sediments ; Solute transport ; Water quality ; Bed roughness ; Friction velocity ; Overlying water ; Permeable bed ; Sediment water interface ; Transition layers ; Transitional regimes ; Water quality predictions ; Large eddy simulation ; water ; water ; bed roughness ; dimensionless number ; large eddy simulation ; mass transfer ; permeability ; sediment-water interface ; solute transport ; transfer function ; turbulence ; Article ; friction ; permeability ; priority journal ; sediment ; simulation ; solute ; velocity ; water quality ; computer simulation ; permeability ; solution and solubility ; theoretical model ; water flow ; Computer Simulation ; Friction ; Geologic Sediments ; Models, Theoretical ; Permeability ; Solutions ; Water ; Water Movements
英文摘要: Understanding the mechanisms of solute transfer across the sediment-water interface plays a crucial role in water quality prediction and management. In this study, different arranged particles are used to form typical rough and permeable beds. Large Eddy Simulation (LES) is used to model the solute transfer from the overlying water to sediment beds. Three rough wall turbulence regimes, i.e., smooth, transitional and rough regime, are separately considered and the effects of bed roughness on solute transfer are quantitatively analyzed. Results show that the classic laws related to Schmidt numbers can well reflect the solute transfer under the smooth regime with small roughness Reynolds numbers. Under the transitional regime, the solute transfer coefficient (KL +) is enhanced and the effect of Schmidt number is weakened by increasing roughness Reynolds number. Under the rough regime, the solute transfer is suppressed by the transition layer (Brinkman layer) and controlled by the bed permeability. Moreover, it is found that water depth, friction velocity and bed permeability can be used to estimate the solute transfer velocity (KL) under the completely rough regime. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113082
Appears in Collections:气候减缓与适应

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作者单位: State Key Laboratory of Hydro-science and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, 100084, China; Department of Civil & Environmental Engineering, Texas Tech University, Lubbock, TX 79409-1023, United States

Recommended Citation:
Han X.,Fang H.,He G.,et al. Effects of roughness and permeability on solute transfer at the sediment water interface[J]. Water Research,2018-01-01,129
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