Concentration distribution for pollutant dispersion in a reversal   laminar flow

doi:10.1016/j.jhydrol.2017.05.057

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	Concentration distribution for pollutant dispersion in a reversal laminar flow
	Wang, Ping ; Chen, G. Q.
刊名	JOURNAL OF HYDROLOGY
	2017
关键词	Taylor dispersion Reversal laminar flows Concentration distribution OPEN-CHANNEL FLOW TAYLOR DISPERSION ENVIRONMENTAL DISPERSION CONTAMINANT DISPERSION LONGITUDINAL DISPERSION OSCILLATORY FLOWS SOLUTE-DISPERSION STRAIGHT PIPE TIDAL WETLAND TUBE FLOW
DOI	10.1016/j.jhydrol.2017.05.057
英文摘要	Pollutant transport in reversal laminar flows gains its significance in various coastal regions. Since oscillation in the flow introduces much complexity into the transport process, little progress has been made to illustrate the evolution of concentration distribution. In this work, the first order expansion of the generalized dispersion model, as a simplified applicable method based on the previously proposed Aris-Gill expansion (Wang and Chen, 2016b,c), is applied to analytically study the pollutant dispersion in an open channel reversal laminar flow. This method is conveniently used to accurately predict the two-dimensional concentration evolution characteristic of peak concentration position and duration. The vertical concentration difference is determined to be tremendous and vary periodically, and the peak concentration appears at the freesurface or bottom depending on the reversal amplitude. The approach for vertical concentration to uniformity in the dispersion process lasts longer remarkably in reversal flows than that in steady flows. (C) 2017 Elsevier B.V. All rights reserved.; State Key Program for Basic Research (973 Program) [2013CB430402]; Fundamental Research Funds for the Central Universities [BLX201619]; SCI(E); ARTICLE; ,SI; 151-161; 551
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471722]
专题	工学院
推荐引用方式 GB/T 7714	Wang, Ping,Chen, G. Q.. Concentration distribution for pollutant dispersion in a reversal laminar flow[J]. JOURNAL OF HYDROLOGY,2017.
APA	Wang, Ping,&Chen, G. Q..(2017).Concentration distribution for pollutant dispersion in a reversal laminar flow.JOURNAL OF HYDROLOGY.
MLA	Wang, Ping,et al."Concentration distribution for pollutant dispersion in a reversal laminar flow".JOURNAL OF HYDROLOGY (2017).