View : 81 Download: 0

Theoretical study on the change of the particle extinction coefficient during the aerosol dynamic processes

Title
Theoretical study on the change of the particle extinction coefficient during the aerosol dynamic processes
Authors
Jung C.H.Kim Y.P.
Ewha Authors
김용표
SCOPUS Author ID
김용표scopus
Issue Date
2008
Journal Title
Journal of Aerosol Science
ISSN
0021-8502JCR Link
Citation
vol. 39, no. 10, pp. 904 - 916
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
In this study, the effects of aerosol dynamics on the aerosol optical properties were analytically investigated using an approximated expression for the overall extinction coefficient (bext), which was valid for a wide range of particle size. The processes of both coagulation and condensation in the continuum region were considered using the moment method, with an overall extinction coefficient obtained from the harmonic mean between the overall particle extinction coefficient of the Rayleigh scattering and geometric scattering regions. The derived analytical expressions were compared with the asymptotic expressions of the extinction coefficient, which showed that the obtained expressions ultimately approached the asymptotic expressions. Subsequently, this study showed a simple and straightforward method for estimating the changes in the extinction coefficient and visibility of polydispersed aerosols during aerosol dynamic processes. The accuracy of the approximated overall coefficient was dependent on a given aerosol refractive index and size parameter. Usually, the error was less than 8% for an average size parameter range of 0-80. © 2008 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.jaerosci.2008.06.003
Appears in Collections:
엘텍공과대학 > 화학신소재공학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE