DOI: 10.1016/j.atmosenv.2017.07.052
Scopus记录号: 2-s2.0-85026772383
论文题名: Aerosol particles scavenging by a droplet: Microphysical modeling in the Greenfield gap
作者: Cherrier G ; , Belut E ; , Gerardin F ; , Tanière A ; , Rimbert N
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 166 起始页码: 519
结束页码: 530
语种: 英语
英文关键词: Aerosol particles
; Collection kernel
; Droplet
; Scavenging
Scopus关键词: Aerosols
; Brownian movement
; Drag
; Efficiency
; Global warming
; Pollution control
; Reynolds number
; Scavenging
; Aerosol particles
; Collection efficiency
; Diffusional parameters
; Microphysical models
; Moderate Reynolds numbers
; Particle Stokes number
; Scavenging efficiency
; Theoretical modeling
; Drops
; aerosol
; atmospheric modeling
; cloud microphysics
; droplet
; efficiency measurement
; global warming
; Reynolds number
; scavenging (chemistry)
; aerosol
; Article
; correlation analysis
; diffusion
; motion
; priority journal
; shear stress
; simulation
; surface property
; theoretical model
; velocity
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Studying the scavenging of aerosol particle by drops has been a key topic of atmospheric science since the late seventies, given its relationships with atmospheric depollution, with the physics of clouds and precipitations and with global warming. However, the efficiency with which falling droplets capture aerosol particles is still imprecisely known for a wide range of drop Reynolds number, Weber numbers, aerosol particles inertia and Brownian Schmidt number. In this paper, microphysical modeling is used to compute precisely the drop collection efficiency for aerosol particles around the Greenfield gap which are submitted to both drag force and Brownian motion, for droplets falling in quiescent air at moderate Reynolds number (Red≤100). Depending on the impactional or diffusional parameters, the collection regions on the drop surface are highlighted. The results are then compressed by a correlation which extends the field of use of the theoretical model of Wang et al. (1978) by taking inertial capture into account. The proposed correlation is suitable to estimate the aerosol scavenging efficiency for a non-evaporating, non-deforming drop with Red≤100 and particle Stokes number Stp∈[0;+∞]. In case of evaporating or condensing droplets, the effect of thermophoresis and diffusiophoresis are also taken into account through an extension of the formulation proposed by Wang et al. (1978) and hence with similar accuracy. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82324
Appears in Collections: 气候变化事实与影响
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作者单位: Département Ingénierie des Procédés, Institut National de Recherche et de Sécurité, Rue du Morvan CS 60027, Vandoeuvre, France; LEMTA, CNRS, UMR 7563, 2 Avenue de la Forêt de Haye BP 90161, Vandoeuvre, France; Université de Lorraine, 34 Cours Léopold, Nancy, France
Recommended Citation:
Cherrier G,, Belut E,, Gerardin F,et al. Aerosol particles scavenging by a droplet: Microphysical modeling in the Greenfield gap[J]. Atmospheric Environment,2017-01-01,166