Author(s)

Sadataka Shibu, Suguru Kato, Yushi Hirata & Shunsaku Yagi

Abstract

Condensational growth of cloud droplet on atmospheric (NH^SO, particle Sadataka Shibu^ Suguru Kato\ Yushi Hirata' & Shunsaku Yagf * Department of Chemical Science Engineering, Graduate School of Osaka University, Toyonaka, Osaka 560-8531, Japan ^Department of Industrial and Systems Engineering, Setsunan University, Neyagawa, Osaka 572-8508, Japan Email: yagi@ise.setsunan.ac.jp Abstract In order to investigate the acidification process of cloud drops (i.e., acid rain for- mation) due to rainout (in cloud scavenging) of gaseous pollutants as 882 (g) and NOx(g)> the non-steady characteristics of the growth of single cloud droplet by con- densation of the atmospheric water vapor is simulated numerically with use of a mathematical model. The mathematical model is constituted by the conservation laws of water mass and heat energy and the state equation of ideal gas. The time variation of droplet heat Qw is very fast compared with that of droplet mass m^. Therefore, usual

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