Influence of Dispersed-Phase Viscosity on Droplet Breakup in a Continuous Pump-Mixer

Zhou, Han; Yang, Jinjie; Jing, Shan; Lan, Wenjie; Zheng, Qiang; Li, Shaowei

doi:10.1021/acs.iecr.9b05239

Cited by 17 publications

(45 citation statements)

References 44 publications

(85 reference statements)

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“…Multiple breakageIn this section, the probability distributions of the number of fragments, the maximum stable drop diameter, and the percentage of binary breakage were discussed.Figure 9shows the proportion of binary, ternary, quaternary, and quaternary+ breakage. Similar to our previous studies,45,46 the binary breakup is dominant over wholeF I G U R E 7 Experimental breakup time versus the predicted breakup time (a) based on Equation 9, c 5 = 210, (b) based on Equation (12) [Color figure can be viewed at wileyonlinelibrary.com]…”

supporting

confidence: 60%

“…Ashar et al 36 Recently, experiments have been carried out by Li's group to directly measure the breakup rate in a pulsed column [38][39][40]44 and in a pump-mixer. 45,46 In the above study, the multiple breakup process is treated mathematically as a sequence of the binary breakup. In this study, experimental data of the breakup rate are also provided.…”

Section: Review Of Experimental Study On Drop Breakup Time and Breamentioning

confidence: 99%

“…Figure 12 shows the results of the drop breakup rate using the drop diameter as the abscissa. It is noted from Figure 12a In our previous research, 46 an empirical correlation of the drop breakup rate was constructed based on the dimensionless analysis.…”

Section: Breakup Ratementioning

confidence: 99%

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Experimental study on drop breakup time and breakup rate with drop swarms in a stirred tank

Zhou

Wang

et al. 2020

AIChE Journal

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The direct experimental data for breakup parameters of drop breakup time, multiple breakage, and breakup rate are urgently required to understand drop breakup phenomena. In this regard, drop breakup experiments were carried out in a stirred tank using a high‐speed online camera. The influences of the rotating speed, interfacial tension, and drop viscosity on the above breakup parameters were then quantitatively investigated. An mechanism correlation for the breakup time is proposed and is further verified by comparing with the results of Solsvik and Jakobsen (Chem Eng Sci, 2015;131:219‐234). The percentage of multiple breakage comparing to binary breakup was statistically counted. The results indicated that the dimensionless drop diameter η = d/dmax can be adopted to characterize the proportion of binary breakup. Finally, the breakup rate was experimentally measured and the breakup probability was calculated using the inverse method.

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supporting

confidence: 60%

Section: Review Of Experimental Study On Drop Breakup Time and Breamentioning

confidence: 99%

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Experimental study on drop breakup time and breakup rate with drop swarms in a stirred tank

Zhou

Wang

et al. 2020

AIChE Journal

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“…the breakup time, and the number of fragments were recorded. The breakup rate was also measured using Equation 1, which is consistent with the method adpoted by our previous study 45 .…”

Section: Review Of Experimental Study On Drop Breakup Time and Breakup Ratesupporting

confidence: 80%

“…Recently, experiments have been carried out by Li's group to measure the breakup rate directly in a pulsed disc and doughnut column [38][39][40]44 and in a pump-mixer 41,45 . In the above study, the multiple breakup process is treated mathematically as a sequence of the binary breakup.…”

Section: Review Of Experimental Study On Drop Breakup Time and Breakup Ratementioning

confidence: 99%

Experimental study on drop breakup time and breakup rate with drop swarm in a stirred tank

Zhou¹,

Yu²,

Wang³

et al.

Authorea

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Drop breakup experiments were carried out in a stirred tank using the high-speed online camera. Breakup behaviors of drop breakup time, multiple breakage, and breakup rate were investigated. Experimental results show that the drop breakup time is mainly controlled by the interfacial tension and drop diameter, while is almost independent of the rotating speed. Besides, the dispersed phase viscosity has a slight influence on the breakup time. An empirical correlation for the breakup time is proposed and is further verified by comparing with the results of Solsvik and Jakobsen (Chem. Eng. Sci., 2015, 131: 219-234). The percentage of multiple breakage comparing to binary breakup was statistically counted. The results indicated that the dimensionless drop diameter η = d / dmax can be adopted to characterize the proportion of binary breakup. Finally, the breakup rate was experimentally measured and the breakup probability was calculated using the inverse method.

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Measurement of droplet coalescence in a mixing tank

Cai,

Yang,

Jin

et al. 2023

AIChE Journal

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It is in urgent requirement to directly measure the droplet coalescence frequency for the application of the population balance model. In this study, a method was firstly developed to directly measure the droplet coalescence frequency in turbulent flow field by using a specially designed mixing tank and a high‐speed camera. The effects of the rotating speed and holdup fraction on the droplet coalescence frequency were quantitatively investigated. The increasing of rotation speed promotes first and then inhibits the coalescence, while the holdup fraction has little influence on the coalescence frequency function. The droplet collision frequency was also counted and the coalescence efficiency was calculated. The models in the literature were tested with our experimental data and were found failing to predict the coalescence frequency in the stirring tank. Empirical correlation was finally proposed and good agreement was found between the prediction results and the experimental data.

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Influence of Dispersed-Phase Viscosity on Droplet Breakup in a Continuous Pump-Mixer

Cited by 17 publications

References 44 publications

Experimental study on drop breakup time and breakup rate with drop swarms in a stirred tank

Experimental study on drop breakup time and breakup rate with drop swarms in a stirred tank

Experimental study on drop breakup time and breakup rate with drop swarm in a stirred tank

Measurement of droplet coalescence in a mixing tank

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