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Local measurements for the study of external loop airlift hydrodynamics

Utiger, Marianne and Stüber, Frank and Billet, Anne-Marie and Delmas, Henri and Guy, Christophe Local measurements for the study of external loop airlift hydrodynamics. (1999) The Canadian Journal of Chemical Engineering, 77 (2). 375-382. ISSN 0008-4034

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Official URL: https://doi.org/10.1002/cjce.5450770225

Abstract

Hot-film anemometry and an optical biprobe are used to measure local flow characteristics in the riser of an external loop airlift reactor. Important flow asymmetries are observed above the sparger and developing flow persists through a large part of the riser. As gas flow rate increases, radial gas hold-up profiles change from relatively flat to parabolic while the shape of radial liquid velocity profiles remains constant and Sauter bubble diameter increases. At large gas superficial velocities, slip velocity is found to deviate considerably from the frequently used value of 0.25 m/s. Local measurements allow a better understanding of two-phase flow in airlift reactors and can be used for CFD-modeling development and validation.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Polytechnique de Montréal (CANADA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Funders:
National Science and Engineering Research Council of Canada - Fonds pour la Formation de Chercheurs et l’Aide a la Recherche (Québec)
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Deposited By: Anne-marie BILLET
Deposited On:01 Mar 2019 11:07

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