Development and evaluation of an expression for polydisperse particle scavenging coefficient for the below-cloud scavenging as a function of rain intensity using the moment method

Soo Ya Bae; Chang Hoon Jung; Yong Pyo Kim

doi:10.1016/j.jaerosci.2006.02.003

Development and evaluation of an expression for polydisperse particle scavenging coefficient for the below-cloud scavenging as a function of rain intensity using the moment method

Soo Ya Bae, Chang Hoon Jung, Yong Pyo Kim

Department of Chemical Engineering & Materials Science

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

An analytical expression for wet scavenging coefficient for below-cloud scavenging that is function of collision efficiency, raindrop terminal velocity, raindrop size distribution, and particle size distribution is obtained and tested. The parameters of raindrop size distribution are related with rain intensity since rain intensity can be easily measured. Then, the moment method is applied to the expression for scavenging coefficient to derive an analytical expression. Two widely used raindrop size distribution, Marshall-Palmer and lognormal distributions are considered and lognormal particle size distribution is assumed. The derived scavenging coefficient expression is applied to three model environments, urban, rural, and desert to demonstrate its applicability.

Original language	English
Pages (from-to)	1507-1519
Number of pages	13
Journal	Journal of Aerosol Science
Volume	37
Issue number	11
DOIs	https://doi.org/10.1016/j.jaerosci.2006.02.003
State	Published - Nov 2006

Bibliographical note

Funding Information:
This study was carried out with the supports from the Climate Environment System Research Center, an SRC program funded by Korea Science and Engineering Foundation, Korea. C. H. Jung was supported by the 2005 academic research funds of Kyungin Women's College.

Keywords

Moment method
Particle size distribution
Rain intensity
Raindrop size distribution
Scavenging coefficient

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10.1016/j.jaerosci.2006.02.003

Cite this

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title = "Development and evaluation of an expression for polydisperse particle scavenging coefficient for the below-cloud scavenging as a function of rain intensity using the moment method",

abstract = "An analytical expression for wet scavenging coefficient for below-cloud scavenging that is function of collision efficiency, raindrop terminal velocity, raindrop size distribution, and particle size distribution is obtained and tested. The parameters of raindrop size distribution are related with rain intensity since rain intensity can be easily measured. Then, the moment method is applied to the expression for scavenging coefficient to derive an analytical expression. Two widely used raindrop size distribution, Marshall-Palmer and lognormal distributions are considered and lognormal particle size distribution is assumed. The derived scavenging coefficient expression is applied to three model environments, urban, rural, and desert to demonstrate its applicability.",

keywords = "Moment method, Particle size distribution, Rain intensity, Raindrop size distribution, Scavenging coefficient",

author = "Bae, {Soo Ya} and Jung, {Chang Hoon} and {Pyo Kim}, Yong",

note = "Funding Information: This study was carried out with the supports from the Climate Environment System Research Center, an SRC program funded by Korea Science and Engineering Foundation, Korea. C. H. Jung was supported by the 2005 academic research funds of Kyungin Women's College.",

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AU - Jung, Chang Hoon

AU - Pyo Kim, Yong

N1 - Funding Information: This study was carried out with the supports from the Climate Environment System Research Center, an SRC program funded by Korea Science and Engineering Foundation, Korea. C. H. Jung was supported by the 2005 academic research funds of Kyungin Women's College.

PY - 2006/11

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N2 - An analytical expression for wet scavenging coefficient for below-cloud scavenging that is function of collision efficiency, raindrop terminal velocity, raindrop size distribution, and particle size distribution is obtained and tested. The parameters of raindrop size distribution are related with rain intensity since rain intensity can be easily measured. Then, the moment method is applied to the expression for scavenging coefficient to derive an analytical expression. Two widely used raindrop size distribution, Marshall-Palmer and lognormal distributions are considered and lognormal particle size distribution is assumed. The derived scavenging coefficient expression is applied to three model environments, urban, rural, and desert to demonstrate its applicability.

AB - An analytical expression for wet scavenging coefficient for below-cloud scavenging that is function of collision efficiency, raindrop terminal velocity, raindrop size distribution, and particle size distribution is obtained and tested. The parameters of raindrop size distribution are related with rain intensity since rain intensity can be easily measured. Then, the moment method is applied to the expression for scavenging coefficient to derive an analytical expression. Two widely used raindrop size distribution, Marshall-Palmer and lognormal distributions are considered and lognormal particle size distribution is assumed. The derived scavenging coefficient expression is applied to three model environments, urban, rural, and desert to demonstrate its applicability.

KW - Moment method

KW - Particle size distribution

KW - Rain intensity

KW - Raindrop size distribution

KW - Scavenging coefficient

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ER -

Development and evaluation of an expression for polydisperse particle scavenging coefficient for the below-cloud scavenging as a function of rain intensity using the moment method

Abstract

Bibliographical note

Keywords

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