摘要
采用流体力学软件中的拉格朗日模型对单棵树冠上的颗粒物沉积行为进行微观尺度的模拟分析,获得颗粒物在树冠内部及周围的浓度分布,分析了树冠结构参数即叶面积指数、颗粒物直径及入口风速对树冠上颗粒物干沉积速度的影响。模拟结果表明,树冠对颗粒物捕集的干沉积速度,随叶面积指数、入口风速的增大而逐渐增大,随颗粒物直径的增大呈先减小后增大的趋势,并在颗粒物直径为1μm时达到最小值。树冠对颗粒物的干沉积速度模拟值与文献基本吻合。
The micro-scale simulation of particle deposition on a single tree canopy was simulated by Lagrangian model in fluid mechanics software to obtain the concentration distribution of the particles inside and around the canopy.The effect of leaf area index,particle diameter and inlet wind velocity on the deposition velocity of particles in the canopy were analyzed.The simulation result indicates that the dry deposition velocity of the tree canopy increases with the increase of leaf area index and inlet wind velocitys.While it decreases first and then increases with the increase of particle diameter,and reaches the minimum value when the particle diameter is 1μm.The simulated results of the dry deposition velocity of the tree canopy to the particles is basically in agreement with the literature.
作者
边慧娟
付海明
BIAN Huijuan;FU Haiming(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection,Donghua University,Shanghai 201620,China)
出处
《东华大学学报（自然科学版）》
CAS
北大核心
2019年第6期924-930,937,共8页
Journal of Donghua University(Natural Science)
基金
国家自然科学基金资助项目（41371445）
关键词
树冠捕集效率
叶面积指数
颗粒物直径
干沉积速度
拉格朗日模型
tree canopy capture efficiency
leaf area index
particle diameter
dry deposition velocity
Lagrangian model
