Current atmospheric observations tend to support the view that continental tropospheric aerosols (particularly urban aerosols) show multimodal mass distributions in the size range of 0.01-100 μm. The origin of these aerosols is both natural and anthropogenic. Recently, trimodal sub-μm size distributions from combustion measurements at 0.008, 0.035 and 0.15 μm were also observed. Our interest in the present study is the secondary process of growth of sub-μm size aerosols by the coagulation process alone. Using the 'J-space' (integer-space) distribution method of Salk (Suck) and Brock (1979, J. Aerosol Sci. 10, 58-590), we report an accurate numerical simulation study of the evolution of ultrafine to fine particle size distributions. Comparision with the analytic solution of Scott (1968, J. atmos. Sci. 25, 54-64) was made to test the accuracy of our J-space or integer-space distribution method. Our multimodal sub-μ particle size distribution study encompassed the particle size range of 0.001-0.20 μm. Details of particle growth in each mode and interaction between different modes in the multimodal distribution were qualitatively analyzed. © 1986.
S. H. Suck Salk et al., "Growth Of Ultrafine Particles By Brownian Coagulation," Atmospheric Environment (1967), vol. 20, no. 4, pp. 773 - 777, Elsevier, Jan 1986.
The definitive version is available at https://doi.org/10.1016/0004-6981(86)90193-9
Electrical and Computer Engineering
Chemical and Biochemical Engineering
International Standard Serial Number (ISSN)
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01 Jan 1986