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Local investigations on the gas-liquid mass transfer around Taylor bubbles flowing in a meandering millimetric square channel

Yang, Lixia and Loubière, Karine and Dietrich, Nicolas and Le Men, Claude and Gourdon, Christophe and Hebrard, Gilles Local investigations on the gas-liquid mass transfer around Taylor bubbles flowing in a meandering millimetric square channel. (2017) Chemical Engineering Science, 165. 192-203. ISSN 0009-2509

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Official URL: http://dx.doi.org/10.1016/j.ces.2017.03.007

Abstract

Gas-liquid mass transfer around Taylor bubbles moving in a meandering millimetric square channel was locally visualized and characterized in the present study. For that, the colorimetric technique proposed by Dietrich et al. (2013) was implemented. With this technique, the evolution of equivalent oxygen concentration fields in the liquid slugs passing through one and several bends was firstly described. In particular, it was observed how the flow structure (recirculation zones) inside the liquid slugs were twisted and split by the periodic bends (centrifugal effect), until reaching, after several bends, a uniform O2 concentration inside the liquid slugs. The influence of the “turning point”, joining two “straight” sections of meandering channel was also highlighted: a slowing down of the gas-liquid mass transfer was clearly shown. Volumetric mass transfer coefficients were determined at last by fitting the experimental axial profiles of averaged oxygen concentrations in the liquid slugs (before the turning point) with the ones predicted by a classical plug-flow model.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The original PDF of the article can be found at : http://www.sciencedirect.com/science/article/pii/S000925091730177X#!
HAL Id:hal-01600809
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Funders:
China Scholarship Council
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Deposited By: Karine LOUBIERE
Deposited On:15 Dec 2017 13:26

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