Author(s): W.H. Chen
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...
Size: 1,055 kb
Paper DOI: 10.2495/AIR010621
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