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DOI	10.1029/2019JD032172
	Efficient Method of Moments for Simulating Atmospheric Aerosol Growth: Model Description, Verification, and Application
	Shen J.; Yu M.; Chan T.L.; Tu C.; Liu Y.
发表日期	2020
ISSN	2169897X
卷号	125 期号:13
英文摘要	The atmospheric aerosol dynamics model (AADM) has been widely used in both comprehensive air quality model systems and chemical transport modeling globally. The AADM consists of Smoluchowski's coagulation equation (SCE), whose solution undergoing Brownian coagulation in the free molecular regime is a challenge because it is inconsistent with aerosols whose size distribution cannot exactly follow the lognormal size distribution. Thus, a new method for solving the SCE without assuming lognormal size distribution is proposed and developed. The underlying principle of this method is that the hybridization of the well-established method of moments with the assumed lognormal size distribution (log MOM) and Taylor-series expansion method of moments (TEMOM) is implemented. This method shows excellent agreement with the sectional method (SM) which is used as reference. The accuracy of these two specific models closely approaches that of the TEMOM, but overcomes the limitation of the classical log MOM. The computational time of this scheme is considerably lower than that of the SM. The new method was successfully implemented to reveal the formation and growth of secondary particles emitted from a vehicle exhaust tailpipe. It was found that the formation of new particles only occurs in the interface region of the turbulent exhaust jet (which is very close to the tailpipe exit), whereas no new particles are formed in the mixture of the exhaust jet plume and the surrounding cold air downstream. The new method is verified as an efficient and reliable numerical scheme for studying atmospheric aerosol dynamics. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric aerosol dynamics model; method of moments; secondary nanoparticle formation; simulation; vehicle exhaust
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185919
作者单位	Laboratory of Aerosol Science and Technology, China Jiliang University, Hangzhou, China; Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
推荐引用方式 GB/T 7714	Shen J.,Yu M.,Chan T.L.,et al. Efficient Method of Moments for Simulating Atmospheric Aerosol Growth: Model Description, Verification, and Application[J],2020,125(13).
APA	Shen J.,Yu M.,Chan T.L.,Tu C.,&Liu Y..(2020).Efficient Method of Moments for Simulating Atmospheric Aerosol Growth: Model Description, Verification, and Application.Journal of Geophysical Research: Atmospheres,125(13).
MLA	Shen J.,et al."Efficient Method of Moments for Simulating Atmospheric Aerosol Growth: Model Description, Verification, and Application".Journal of Geophysical Research: Atmospheres 125.13(2020).