Effect of Particle Size on the Rising Behavior of Particle-Laden Bubbles

Langmuir : the ACS Journal of Surfaces and Colloids
Peipei WangPablo R Brito-Parada

Abstract

The rising behavior of bubbles, initially half and fully coated with glass beads of various sizes, was investigated. The bubble velocity, aspect ratio, and oscillation periods were determined using high-speed photography and image analysis. In addition, the acting forces, drag modification factor, and modified drag coefficient were calculated and interpreted. Results show that the aspect ratio oscillation of the rising bubbles is similar, irrespective of the attached particle size. As the particle size is increased, the rising bubbles have a lower velocity and aspect ratio amplitude, with the time from release to each aspect ratio peak increasing. Higher particle coverage is shown to decrease the bubble velocity and dampen the oscillations, reducing the number of aspect ratio peaks observed. The highest rise velocities correspond to the lowest aspect ratios and vice versa, whereas a constant aspect ratio yields a constant rise velocity, independent of the particle size. Force analysis shows that the particle drag modification factor increases with the increased particle size and is greatest for fully laden bubbles. The modified drag coefficient of particle-laden bubbles increases with the increased particle size, although it de...Continue Reading

References

May 20, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Seher Ata
Jun 3, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Rogerio ManicaDerek Y C Chan
Sep 8, 2015·Advances in Colloid and Interface Science·Ghislain BournivalErica J Wanless
May 26, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Ghislain BournivalErica J Wanless
Aug 10, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Jinlong YangYi Y Zuo

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Citations

Dec 11, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Louis C Y YuCarolyn A Koh

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