The terminal velocity and frequency of oscillation of drops in pure systems

Edge, Ron; Grant, Colin

doi:10.1016/0009-2509(71)80013-1

Cited by 39 publications

(15 citation statements)

References 14 publications

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“…Hu and Kintner, 1955;Klee and Treybal, 1956), but the correlations were obtained with unpurified systems. Winnikow and Chao (1966); Thorsen et al (1968) and Edge and Grant (1971) reported terminal velocities well above the predictions using purified systems. The terminal and interfacial velocity is reduced if the liquid contains impurities or surfactants (e.g.…”

Section: Introductionmentioning

confidence: 60%

Transient rise velocity and mass transfer of a single drop with interfacial instabilities – experimental investigations

Wegener

Grünig

Stüber

et al. 2007

Chemical Engineering Science

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Section: Introductionmentioning

confidence: 60%

Transient rise velocity and mass transfer of a single drop with interfacial instabilities – experimental investigations

Wegener

Grünig

Stüber

et al. 2007

Chemical Engineering Science

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“…The surfactant effect retards the renewal of the liquid-liquid interface and consequently slows down the velocities of the drops. Winnikow and Chao (1966), Thorsen et al (1968), and Edge and Grant (1971) showed that in systems of purified liquids without the surfactant effect, the terminal velocity of the drops was faster than the predicted values. The higher terminal velocities of the relatively large aqueous electrolytic drops compared to most of the predicted values, as seen in Figure 4, can perhaps be explained from the viewpoint of negative adsorption of the dissolved electrolytes at the interface.…”

Section: Salt Effects On Single Aqueous Drops 1305mentioning

confidence: 95%

“…Edge and Grant, 1971) are not included in these two tables because the purpose of this work is to study the effect of dissolved electrolytes in the aqueous drops.…”

Section: Onset Of Drop Oscillationmentioning

confidence: 99%

Salt Effects on Single Aqueous Drops Falling through an Immiscible Organic Liquid

Chen

Maa

Yang

et al. 2002

Chemical Engineering Communications

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Drop settling (or rising) is crucial to the breaking of liquid-liquid dispersions. Most of the empirical correlations for terminal velocity of drops are formulated based on experimental data for systems of dispersed organic phase and continuous aqueous phase using pure and nearly pure liquids. Because the presence of the various third components in one or both of the phases may affect the settling of the drops, the terminal velocity and the onset of oscillation of aqueous drops containing various concentrations of electrolytes falling through n-dodecane were studied in this work. The applicability of existing empirical correlations to these reversed systems of continuous organic phase and dispersed aqueous phase was also examined.Dissolved electrolytes have the effect of causing the terminal velocities and their peak velocities at the onset of drop oscillation to become faster and the peak diameters to become smaller when their concentrations are high enough to cause sufficient changes of physical properties. Existing correlations for drop terminal velocity in pure systems are shown to be adequate in the presence of electrolytes. For high interfacial tension systems, the Hu-Kinter correlation predicts the terminal velocity of organic drops in water and aqueous drops in organics equally well, independent of the presence of electrolytes.The criteria of Hu-Kintner can be used to estimate the peak velocities and peak diameters at the onset of oscillation within a deviation of 3.7%.

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“…Correlations by Klee and Treybal (1956), Hu and Kintner (1955), Johnson and Braida (1957), Edge and Grant (1971), and Grace et al (1976) were discussed by Skelland et al (1987) and are shown in Appendix B. These correlations were developed for a liquid droplet moving at terminal velocity through another liquid phase, and they may not be easily extrapolated to the case of liquid droplets in a gas.…”

Section: Flow Transitionsmentioning

confidence: 99%

Liquid‐phase mass transfer in spray contactors

Yeh

Rochelle

2003

AIChE Journal

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The liquid‐phase mass transfer in sprays has been measured with carbon dioxide desorption by collecting and analyzing samples of the spray. Experiments were conducted with laboratory‐ (0.009 to 0.13 L/s) and pilot‐scale (6.4 to 12.8 L/s) centrifugal hollow‐cone spray nozzles at pressure drops from 34 kPa to 138 kPa. Significant mass transfer occurred during sample collection, and a quench sampling method was developed to minimize this effect. The number of liquid‐phase transfer units (NL) due to spray impact onto walls and liquid pools was often as much as the spray NL. Approximately 60% of the spray NL occurs in the liquid sheet before droplet formation, and the droplet region can account for less than half of the total NL of the spray.

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The terminal velocity and frequency of oscillation of drops in pure systems

Cited by 39 publications

References 14 publications

Transient rise velocity and mass transfer of a single drop with interfacial instabilities – experimental investigations

Transient rise velocity and mass transfer of a single drop with interfacial instabilities – experimental investigations

Salt Effects on Single Aqueous Drops Falling through an Immiscible Organic Liquid

Liquid‐phase mass transfer in spray contactors

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