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Direct measurement of droplet breakage in a pulsed disc and doughnut column
Author(s) -
Zhou Hao,
Jing Shan,
Fang Qi,
Li Shaowei,
Lan Wenjie
Publication year - 2017
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15742
Subject(s) - breakup , mechanics , breakage , flow (mathematics) , phase (matter) , population , binary number , optics , chemistry , physics , materials science , mathematics , arithmetic , organic chemistry , sociology , composite material , demography
The lack of experimental data for the droplet breakup has been one of the limitations for the application of population balance model (PBM). In this work, a high‐speed camera was used to directly measure the droplet breakup frequency and daughter size distribution in a pulsed disc and doughnut column. It was found from the captured video that multiple breakup events were more frequently observed than binary breakup. The multiple breakup was treated as an original breakup and several intermediate breakups to characterize the process quantitatively. The effects of pulsation intensity, dispersed phase flow rates, and the spatial locations were investigated in detail. Empirical correlations were finally established for both the breakup frequency function and the daughter droplet size distribution function and fitted well with the experimental data. The correlation equations were then used in a simplified PBM to calculate the droplet number density, which further proved the feasibility of the correlations. © 2017 American Institute of Chemical Engineers AIChE J , 63: 4188–4200, 2017