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Quantitative visualization of swirl and cloud bubbles in Taylor–Couette flow

van Ruymbeke, Bruno and Murai, Yuichi and Tasaka, Yuji and Oishi, Yoshihiko and Gabillet, Céline and Colin, Catherine and Latrache, Noureddine Quantitative visualization of swirl and cloud bubbles in Taylor–Couette flow. (2017) Journal of Visualization, 20 (2). 349-358. ISSN 1343-8875

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Official URL: https://doi.org/10.1007/s12650-016-0391-5

Abstract

We develop a novel method to study the gas phase features in a bubbly Taylor–Couette flow when bubbles are arranged as elevated toroidal strings. The flow is recorded in the front view plane with a high speed camera for a Reynolds number of 1500 and a global void fraction of 0.14 %. An image processing algorithm is developed to discriminate bubbles accumulated in clouds near the inner cylinder (cloud bubbles) from bubbles trapped in the bulk flow by vortices (swirl bubbles). The analysis of the preferential positions, azimuthal velocities, and equivalent void fraction of clouds and swirl bubbles separately provides a new insight into the dynamics of the bubble’s entrapment.

Item Type:Article
HAL Id:hal-02094242
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Navale (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Université de Bretagne Occidentale - UBO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Hokkaido University (JAPAN)
Laboratory name:
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Deposited By: Catherine COLIN
Deposited On:12 Mar 2019 11:47

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