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The properties of large bubbles rising in very viscous liquids in vertical columns

Azzopardi, Barry J.; Pioli, L.; Abdulkareem, L.A.


Barry J. Azzopardi

L. Pioli

L.A. Abdulkareem


Very viscous liquids (>100 Pa s) are found in form of heavy oils and polymers in industry as well as in the natural environment (silicatic magma). Little is known of their behaviour as gas bubbles up through them in vertical columns. Using advanced tomographic instrumentation, the characteristics of these flows have been quantified. It was found that: the gas mainly travels as very large bubbles which occupy a significant part of the column cross-section and that very small bubbles (~100 lm) are created and trapped within the liquid. There is a periodic rising and falling of the top surface of the gas/liquid column as the large bubbles rise to the top and burst.


Azzopardi, B. J., Pioli, L., & Abdulkareem, L. (2014). The properties of large bubbles rising in very viscous liquids in vertical columns. International Journal of Multiphase Flow, 67, doi:10.1016/j.ijmultiphaseflow.2014.08.013

Journal Article Type Article
Acceptance Date Aug 27, 2014
Online Publication Date Sep 19, 2014
Publication Date Dec 4, 2014
Deposit Date Aug 12, 2016
Journal International Journal of Multiphase Flow
Print ISSN 0301-9322
Electronic ISSN 0301-9322
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 67
Keywords Slug; Bubble column; Gas/liquid; Viscous
Public URL
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