Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 14, 2018
Previous Article Next Article

The dynamics of rising oil-coated bubbles: experiments and simulations

Author affiliations

Abstract

Air bubbles rising through an aqueous medium have been studied extensively and are routinely used for the separation of particulates via froth flotation, a key step in many industrial processes. Oil-coated bubbles can be more effective for separating hydrophilic particles with low affinity for the air–water interface, but the rise dynamics of oil-coated bubbles has not yet been explored. In the present work, we report the first systematic study of the shape and rise trajectory of bubbles engulfed in a layer of oil. Results from direct observation of the coated bubbles with a high-speed camera are compared to computer simulations and confirm a pronounced effect of the oil coat on the bubble dynamics. We consistently find that the oil-coated bubbles display a more spherical shape and straighter trajectory, yet slower rise than uncoated bubbles of comparable size. These characteristics may provide practical benefits for flotation separations with oil-coated bubbles.

Graphical abstract: The dynamics of rising oil-coated bubbles: experiments and simulations

Back to tab navigation

Article information


Submitted
09 Aug 2017
Accepted
14 Mar 2018
First published
14 Mar 2018

Soft Matter, 2018,14, 2724-2734
Article type
Paper
Author version available

The dynamics of rising oil-coated bubbles: experiments and simulations

S. Wang, Y. Zhang, J. C. Meredith, S. H. Behrens, M. K. Tripathi and K. C. Sahu, Soft Matter, 2018, 14, 2724
DOI: 10.1039/C7SM01603D

Social activity

Search articles by author

Spotlight

Advertisements