Large-scale coherent structures of suspended dust concentration in the neutral atmospheric surface layer: A large-eddy simulation study
Large-scale coherent structures of suspended dust concentration in the neutral atmospheric surface layer: A large-eddy simulation study
复制标题
中性大气表层悬浮尘埃浓度的大尺度相干结构：大涡模拟研究
DOI：
10.1063/1.5022089
复制
发表时间：
2018-04
影响因子：
4.6
通讯作者：
Xiaojing Zheng
中科院分区：
文献类型：
--
作者：
Yangyue Zhang;Ruifeng Hu;Xiaojing Zheng
尘埃颗粒可以悬浮在大气边界层中，其运动主要由湍流扩散和重力沉降决定。很少有人知道的空间组织悬浮粉尘浓度和湍流相干运动如何有助于垂直输送的尘埃粒子。近年来的大量研究表明，实验室尺度湍流边界层对数区的大尺度和超大尺度运动也存在于高雷诺数大气边界层中，但它们对沙尘输送的影响尚不清楚。本文采用欧拉模式和大涡模拟技术对中性大气边界层中的沙尘输送进行了数值模拟，研究了沙尘浓度的相干结构。瞬时场证实了尘埃浓度存在很长的曲折条纹，具有交替的高浓度和低浓度区域。...
Dust particles can remain suspended in the atmospheric boundary layer, motions of which are primarily determined by turbulent diffusion and gravitational settling. Little is known about the spatial organizations of suspended dust concentration and how turbulent coherent motions contribute to the vertical transport of dust particles. Numerous studies in recent years have revealed that large- and very-large-scale motions in the logarithmic region of laboratory-scale turbulent boundary layers also exist in the high Reynolds number atmospheric boundary layer, but their influence on dust transport is still unclear. In this study, numerical simulations of dust transport in a neutral atmospheric boundary layer based on an Eulerian modeling approach and large-eddy simulation technique are performed to investigate the coherent structures of dust concentration. The instantaneous fields confirm the existence of very long meandering streaks of dust concentration, with alternating high- and low-concentration regions. ...
登录
查看更多内容
分层大气表层粉尘浓度的通量-剖面关系
影响因子：
4.3
作者：
Freire, L. S.;Chamecki, M.;Gillies, J. A.
通讯作者：
Gillies, J. A.
DOI：
--
发表时间：
2015
期刊：
--
影响因子：
--
作者：
J. Jiménez
通讯作者：
J. Jiménez
影响因子：
4.6
作者：
F. Zhao;W. George;B. Wachem
通讯作者：
F. Zhao;W. George;B. Wachem
影响因子：
4.3
作者：
Stimit Shah;E. Bou‐Zeid
通讯作者：
Stimit Shah;E. Bou‐Zeid
影响因子：
4.4
作者：
MARTICORENA, B;BERGAMETTI, G
通讯作者：
BERGAMETTI, G