Numerical study on the engulfing behavior between immiscible droplets in a confined shear flow

Liu, Wankun; Park, Jang Min

doi:10.1016/j.ces.2022.118265

Cited by 3 publications

(3 citation statements)

References 37 publications

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“…Based on this assumption, it may be possible to derive a theoretical equation that expresses the critical contact angle at which oil droplets detach. Liu et al numerically investigated the wetting behavior of two immiscible droplets in contact in a shear flow 79 . As a result, they showed that the wetting behavior of the two droplets depends on the capillary number, and that the higher the capillary number, the more droplets wetted each other.…”

Section: Resultsmentioning

confidence: 99%

“…Liu et al numerically investigated the wetting behavior of two immiscible droplets in contact in a shear flow. 79 As a result, they showed that the wetting behavior of the two droplets depends on the capillary number, and that the higher the capillary number, the more droplets wetted each other. Since the capillary number is a function of droplet size, this suggests that the interaction varies not only with the interfacial tension but also with the size, shear rate, and viscosity of the bubble and droplet.…”

Section: Mechanism Of Oil Droplet Detachment From the Wall Surface By...mentioning

confidence: 99%

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Numerical investigation of oil droplet detachment from wall surface by a microbubble using ternary phase‐field model

Yuhara,

Shirzadi,

Fukasawa

et al. 2023

AIChE Journal

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In this study, we investigated the detachment of an oil droplet from a wall surface by microbubbles (MBs) using the numerical simulation of a gas–liquid–liquid three‐phase flow based on a phase‐field model. A single MB was collided with an oil droplet adhered to a wall surface to determine whether the droplet would detach from the wall. It was confirmed that the oil droplet detached from the wall when the interfacial tension between the water and oil or between the bubble and oil was low. To clarify the mechanism, we theoretically calculated the balance of interfacial tension at the three‐fluid contact line. The lower the interfacial tension between the water and oil and between the bubble and oil, the smaller the contact angle of the oil droplet on the bubble. This increased wettability was the driving force that caused the oil droplet to detach from the wall surface.

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Section: Resultsmentioning

confidence: 99%

Section: Mechanism Of Oil Droplet Detachment From the Wall Surface By...mentioning

confidence: 99%

Numerical investigation of oil droplet detachment from wall surface by a microbubble using ternary phase‐field model

Yuhara,

Shirzadi,

Fukasawa

et al. 2023

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…29 Phase eld modeling of the interaction between two immiscible drops could be found in a few studies. [30][31][32] They however mainly focused on the engulng mechanism in a conned shear ow, and treated all the uids as having equal densities and viscosities. For vertical head-on collisions of two immiscible droplets, Zhang et al 33 investigated the effect of the ratio of interfacial tensions on the lm thickness, the maximal deformation, and the contact time.…”

Section: Introductionmentioning

confidence: 99%