Figure 6. The relationship between mass transfer flux and
interfacial tension.
Droplet breakup behavior under mass
transfer
condition
Under mass transfer conditions two types of droplet breakage patterns,
tensile breakup and revolving breakup, was observed as shown in Figure
7. This phenomenon is the same with that in our previous work without
mass transfer 36. We can then conclude that the
breakup pattern is little affected by mass transfer in the PDDC within
our experimental conditions.
The fragment number of droplets is also a research contents in addition
to the breakup patterns of droplets. As shown in Figure 8 (a), droplet
breakup can be found at different heights from binary breakup to
quintuple breakup under mass transfer conditions. Among these results,
the binary breakup ratio occupies the main position. In the process of
droplet breaking, the energy required for binary breaking is the lowest,
so its breaking standard is easy to achieve. With the increase of the
number of droplets produced by breaking, the energy required will
increase.