Figure 10. Experimental results of DDSD in different height. (a)h = 265 mm. (b) h = 330 mm. (c) h = 395 mm. (d)h = 590 mm.
The experimental results were compared with the predicted results by the DDSD model in our previous work 37 as shown in Figure 11. The comparing method was described in detail in that work. It was found that the predicted results were within an error of ±25% when the measured DIFT were introduced into the equation. It is shown that the correlations for breakup frequency and DDSD obtained under the conditions without mass transfer in our previous work 37 can be directly applied to the prediction of droplet behavior in mass transfer process after the DIFT is determined. This also proves that to introduce a single parameter of DIFT is sufficient to describe the droplet breakage under mass transfer conditions in the PDDC, no other parameters are needed.