气候变化领域集成服务门户(CCPortal): Experimental and numerical investigations of spatially-varying dispersion tensors based on vertical velocity profile and depth-averaged flow field

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DOI	10.1016/j.advwatres.2020.103606
	Experimental and numerical investigations of spatially-varying dispersion tensors based on vertical velocity profile and depth-averaged flow field
	Park I.; Seo I.W.; Shin J.; Song C.G.
发表日期	2020
ISSN	0309-1708
卷号	142
英文摘要	The dispersion coefficient is the most crucial parameter that governs the model prediction of pollutant mixing in rivers. However, the spatial variability of dispersion coefficient associated with velocity structures has not yet been thoroughly investigated. In this study, two types of spatially varying dispersion tensors were considered using both the vertical velocity profiles (DF) and the depth-averaged flow fields (DA), and the pollutant transports using DF and DA were compared with tracer test results in a meandering channel. The results showed that the peak concentration and arrival time were more accurately predicted by using DF than DA, because the flow properties associated with the shear induced dispersion were explicitly incorporated in the DF. The spatial distributions of the DF showed variations in both stream-wise and span-wise directions due to the creation and destruction of secondary flow in the meandering channel. In contrast, the DA only changed in the stream-wise direction. Therefore, the DF is advantageous to reproduce shear dispersion processes. © 2020 Elsevier Ltd
关键词	Flow fields Pollution Tensors Velocity Depth-averaged flows Dispersion coefficient Numerical investigations Peak concentrations Pollutant transport Spatial variability Stream wise direction Vertical velocity profiles Shear flow channel flow dispersion experimental study flow field meander numerical model pollutant transport spatial variation tracer velocity profile
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131755
推荐引用方式 GB/T 7714	Park I.,Seo I.W.,Shin J.,et al. Experimental and numerical investigations of spatially-varying dispersion tensors based on vertical velocity profile and depth-averaged flow field[J]. Advances in Water Resources,2020,142.
APA	Park I.,Seo I.W.,Shin J.,&Song C.G..(2020).Experimental and numerical investigations of spatially-varying dispersion tensors based on vertical velocity profile and depth-averaged flow field.,142.
MLA	Park I.,et al."Experimental and numerical investigations of spatially-varying dispersion tensors based on vertical velocity profile and depth-averaged flow field".142(2020).