Sulfur dioxide absorption in a cloud droplet under the influence of convective flows

Wei-Hsin Chen, J. J. Lu

研究成果: Conference contribution

摘要

Unsteady absorption characteristics of sulfur dioxide by a cloud droplet in convective flows are predicted numerically to recognize the physical mass transport processes. Three different Reynolds numbers, Reg=0.643, 1.287, and 12.87 are studied and compared with each other by considering the droplet with various velocities. The results indicate that for the Reynolds number of 0.643, sulfur dioxide always penetrates toward the droplet centerline throughout the entire absorption period. In contrast, when the Reynolds number is 12.87, most of the time the concentration contours parallel the streamlines and the lowest sulfur dioxide concentration is located at the vortex center. As a consequence, the diffusion distance is reduced by a factor of three and the absorption time for the droplet reaching the saturated state is shortened in a significant way. With regard to an intermediate Reynolds number such as 1.287, a two-stage mass transfer process can be clearly identified, and the contour core is inconsistent with the vortex center. The present study elucidates that the strength of a droplet's internal motion plays a vital role in determining sulfur dioxide absorption process.

原文English
主出版物標題Air Pollution IX
編輯J.W.S. Longhurst, G. Latini, C.A. Brebbia
頁面639-648
頁數10
出版狀態Published - 2001 12月 1
事件Ninth International Conference on Modelling, Monitoring and Management of Air Pollution, Air Pollution IX - Ancona, Italy
持續時間: 2001 9月 122001 9月 14

出版系列

名字Advances in Air Pollution
10

Other

OtherNinth International Conference on Modelling, Monitoring and Management of Air Pollution, Air Pollution IX
國家/地區Italy
城市Ancona
期間01-09-1201-09-14

All Science Journal Classification (ASJC) codes

  • 一般工程

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