Particle Dispersion in the Neutral Atmospheric Surface Layer

被引：7
|
作者：
Belan, Sergey [1 ,2 ]
Lebedev, Vladimir [1 ,2 ]
Falkovich, Gregory [3 ,4 ]
机构：
[1] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia
[2] Landau Inst Theoret Phys, Chernogolovka 142432, Russia
[3] Inst Informat Transmiss Problems, Moscow 127994, Russia
[4] Weizmann Inst Sci, IL-76100 Rehovot, Israel
来源：
BOUNDARY-LAYER METEOROLOGY | 2016年 / 159卷 / 01期
关键词：
Analytical solution; Dispersion theory; Heavy particles; Settling velocity; TURBULENCE; DIFFUSION; TRANSPORT; POLLEN; FLOW;
D O I：
10.1007/s10546-015-0108-7
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
We address theoretically the longstanding problem of particle dispersion in the lower atmosphere. The evolution of particle concentration under an absorbing boundary condition at the ground is described. We derive a close-form solution for the downwind surface density of deposited particles and find how the number of airborne particles decreases with time. The problem of the plume formation above the extended surface source is also solved analytically. At the end, we show how turbophoresis modifies the mean settling velocity of particles.
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页码：23 / 40
页数：18
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