Effect of submerged vegetation on solute transport in an open channel using large eddy simulation
Effect of submerged vegetation on solute transport in an open channel using large eddy simulation
复制标题
利用大涡模拟研究水下植被对明渠中溶质迁移的影响
DOI：
10.1016/j.advwatres.2016.09.003
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发表时间：
2016-11
影响因子：
4.7
通讯作者：
戴会超
中科院分区：
文献类型：
--
作者：
鲁俊;戴会超
植被的存在对明渠水流速度分布、紊流结构和溶质混合有重要影响。本文建立了一个三维大涡模拟模型，模拟了有植被的明渠水流和标量输移。该模型能够模拟出典型的有植被的湍流特性和浓度分布。用湍流施密特数、雷诺通量、相干结构和象限条件分析定量解释了标量输运机制。在动量和标量通量的输运过程中，喷射-清扫事件占主导地位。频谱分析用于识别Kelvin-Helmholtz频率。分析了植被密度对涡旋长度尺度、Kelvin-Helmholtz频率和雷诺应力等湍流特性的影响。该模型定量地预测了浓度分布随植被密度的增加而沿着流向减小的趋势。
Existence of vegetation plays a significant effect on the flow velocity distributions, turbulence structures and solute mixing in an open channel. This paper has implemented a 3D large eddy simulation model for the flow and scalar transport in the open channel with vegetation. The model can produce a typical turbulence characteristics and concentration distribution with vegetation. The scalar transport mechanism is quantitatively explained by the turbulent Schmidt number, Reynolds flux, coherent structures and quadrant conditional analysis. A dominance of ejection-sweeping events occurs in the process of the momentum and scalar flux transport. The spectral analysis is used to identify the Kelvin–Helmholtz frequency. The turbulence characteristics of the length scale of vortexes, Kelvin–Helmholtz frequency and Reynolds stress etc. are analyzed with the vegetation density. The model quantitatively predicts the trend of decreasing in the concentration distribution along the flow direction with the increasing of vegetation density.
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影响因子：
2.8
作者：
A. Busari;C. Li
通讯作者：
A. Busari;C. Li
影响因子：
5
作者：
J. Lu;H. Dai
通讯作者：
J. Lu;H. Dai
影响因子：
2.3
作者：
J. Cui;V. Neary
通讯作者：
J. Cui;V. Neary
影响因子：
3.7
作者：
W. Willmarth;S. Lu
通讯作者：
W. Willmarth;S. Lu
影响因子：
6.4
作者：
Järvelä, J
通讯作者：
Järvelä, J