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Measurements of local interfacial area: application of bi-optical fibre technique

Kiambi, Sammy Lewis and Billet, Anne-Marie and Bascoul, Aimé and Delmas, Henri Measurements of local interfacial area: application of bi-optical fibre technique. (2001) Chemical Engineering Science, 56 (21-22). 6447-6453. ISSN 0009-2509

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Official URL: https://doi.org/10.1016/S0009-2509(01)00245-7


Local mean interfacial area in gas–liquid bubbly flow is experimentally investigated; data is obtained from the experiments carried out with a double optical sensor intrusive probe and analysed by statistical methods. Local variables are measured in the riser of an external loop airlift reactor in air/water medium. The results are presented in the form of the radial pro'les of void fraction, bubble diameter and local average interfacial area at super'cial gas velocities ranging from 0.003 to 0.11 m/s. The axial variations of the same parameters are also investigated. The values of local interfacial area obtained from the classical equation and from bubble velocity statistical treatment methods agree reasonably well. This shows that the double optical probe is a reliable method for local measurements of interfacial area. Eventually, the maximum angle alpha0 between the probe vertical direction and bubble velocity vector at the piercing point is evaluated and the influence of gas superficial velocity on z0 is demonstrated.

Item Type:Article
HAL Id:hal-03604639
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 - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:01 Mar 2019 09:44

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