Large eddy simulation of pollen transport in the atmospheric boundary layer

被引：81

作者：

Chamecki, Marcelo ^{[2
]}

Meneveau, Charles ^{[1
]}

Parlange, Marc B. ^{[3
]}

机构：

[1] Johns Hopkins Univ, Dept Mech Engn, Ctr Environm & Appl Fluid Mech, Baltimore, MD 21218 USA

[2] Johns Hopkins Univ, Dept Geog & Environm Engn, Ctr Environm & Appl Fluid Mech, Baltimore, MD 21218 USA

[3] Ecole Polytech Fed Lausanne, Sch Architecture Civil & Environm Engn, Lausanne, Switzerland

来源：

JOURNAL OF AEROSOL SCIENCE | 2009年 / 40卷 / 03期

基金：

美国国家科学基金会;

关键词：

Pollen; Large eddy simulation; Turbulent dispersion; Ragweed; Heavy particles; AIRBORNE CONCENTRATION; HEAVY-PARTICLES; DEPOSITION RATE; DISPERSION; WIND; PROFILES; MODELS; SPEED; FLOW;

D O I：

10.1016/j.jaerosci.2008.11.004

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This paper presents a framework to simulate pollen dispersal by the wind based on the large eddy simulation (LES) technique. Important phenomena such as the pollen emission by the plants and the ground deposition are parameterized by the lower boundary condition. The numerical model is validated against previously published experiments of point source releases of glass beads and pollen grains in the atmospheric boundary layer. The numerical model is used together with experimental data of pollen emission and downwind deposition from a natural field obtained near Washington, DC, in the summer of 2006. The combined analysis of experimental and numerical data allows to elucidate the emission/transport/deposition process in considerable detail. In particular, the relative fractions of pollen deposited inside the source field and airborne at the edge of the field can be quantified. The use of LES allows quantification of important intermittent deposition events far from the source field. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：241 / 255

页数：15

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