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Article Dans Une Revue Canadian Journal of Chemical Engineering Année : 1999

Local measurements for the study of external loop airlift hydrodynamics

Résumé

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.
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Dates et versions

hal-03607553 , version 1 (14-03-2022)

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Marianne Utiger, Frank Stüber, Anne-Marie Billet, Henri Delmas, Christophe Guy. Local measurements for the study of external loop airlift hydrodynamics. Canadian Journal of Chemical Engineering, 1999, 77 (2), pp.375-382. ⟨10.1002/cjce.5450770225⟩. ⟨hal-03607553⟩
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