Numerical Simulation of Contaminant Release During Sediment Starting in Dynamic Water Environment

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	Numerical Simulation of Contaminant Release During Sediment Starting in Dynamic Water Environment
	Cheng PD(程鹏达); Zhu XG(朱心广); Feng C(冯春); Wang XL(王晓亮)
会议录名称	Lecture Notes in Mechanical Engineering
	2021
会议名称	16th Asian Congress of Fluid Mechanics, ACFM 2019
会议日期	13 December 2019 到 17 December 2019
会议地点	Bengaluru
摘要	In environmental hydrodynamics, the release of contaminant from sediments is one of the main problems. Based on a large number of experimental data provided by water channel experiments, a coupled mechanical model of overlying water, sediment and contaminant is established in this paper. The process of sediment starting and contaminant release is numerically simulated under different velocity conditions of overlying water. The quantitative relationships among velocity, particle volume fraction, contaminant concentration, turbulent kinetic energy and time are obtained by analyzing the relationship between flow field characteristics and contaminant concentration distribution. The results show that contaminant is released rapidly with the suspension of sediment particles and quickly reaches equilibrium concentrations. When the flow field characteristics (Re) change, the contribution of convection and turbulent diffusion to contaminant release process is different. Establishing a quantitative relationship between hydrodynamic conditions and contaminant release can provide support for constructing water pollution model in lake and reservoir areas. © 2021, Springer Nature Singapore Pte Ltd.
关键词	Concentration Particle volume fraction Sediment contaminant Turbulence kinetic energy Velocity
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语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/87803
专题	流固耦合系统力学重点实验室
作者单位	1.Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China 2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing, 100049, China 3.Beijing Institute of Technology, Beijing, 100081, China
推荐引用方式 GB/T 7714	Cheng PD,Zhu XG,Feng C,et al. Numerical Simulation of Contaminant Release During Sediment Starting in Dynamic Water Environment[C]Lecture Notes in Mechanical Engineering,2021.

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