Transient sulfur dioxide absorption inside a freely falling raindrop with terminal velocity

研究成果: Conference contribution

摘要

When a raindrop with fixed radius falls downward in association with terminal velocity, a recirculation bubble always accompanies the gas-phase flow field in the aft region of the drop. With regard to drop internal flow structure, it is sensitive to the drop's size. When the drop radius is small (e.g. rs=200μm), only a single vortex motion is seen inside the drop. Under such a situation, sulfur dioxide absorbed from the interface is mainly transported from the area in front of the aft stagnation point. In contrast, as the drop is relatively large, say, rs=500μm, it is of interest to find that a two-vortex motion, composed of a primary and a secondary vortexes, appears. As a result, the onset of SO2 transport process occurs at the drop's surface near where the two vortexes meet. Accordingly, it is recognized that transient SO2 transport processes inside a raindrop is essentially affected by drop size.

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629-638
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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