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Agitation, Mixing, and Transfers Induced by Bubbles

Risso, Frédéric Agitation, Mixing, and Transfers Induced by Bubbles. (2018) Annual Review of Fluid Mechanics, 50. 25-48. ISSN 0066-4189

(Document in English)

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Official URL: https://doi.org/10.1146/annurev-fluid-122316-045003


Bubbly flows involve bubbles randomly distributed within a liquid. At large Reynolds number, they experience an agitation that can combine shear- induced turbulence (SIT), large-scale buoyancy-driven flows, and bubble- induced agitation (BIA). The properties of BIA strongly differ from those of SIT. They have been determined from studies of homogeneous swarms of rising bubbles. Regarding the bubbles, agitation is mainly caused by the wake-induced path instability. Regarding the liquid, two contributions must be distinguished. The first one corresponds to the anisotropic flow distur- bances generated near the bubbles, principally in the vertical direction. The second one is the almost isotropic turbulence induced by the flow instability through a population of bubbles, which turns out to be the main cause of horizontal fluctuations. Both contributions generate a k −3 spectral subrange and exponential probability density functions. The subsequent issue will be to understand how BIA interacts with SIT.

Item Type:Article
Additional Information:Thanks to Annual Reviews editor. The original PDF of the article can be found at : https://www.annualreviews.org/doi/abs/10.1146/annurev-fluid-122316-045003
HAL Id:hal-01778999
Audience (journal):International peer-reviewed journal
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Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:26 Apr 2018 09:12

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