Transient Sulfur Dioxide Absorption Inside A Freely Falling Raindrop
With Terminal Velocity
Author(s)
W.H. Chen
Abstract
Transient sulfur dioxide absorption inside a
freely falling raindrop with terminal velocity
W.H. Chen
Department of Environmental Engineering and Sanitation,
Foo Yin Institute of Technology,
Taliao, Kaohsiung Hsien, Taiwan, R. O. C.
Abstract
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=200pm), 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=500gm,
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 SO: transport process
occurs at the drop's surf
Keywords
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