Journal
CHEMICAL ENGINEERING JOURNAL
Volume 165, Issue 1, Pages 290-300Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2010.08.021
Keywords
Micro channel; T-junction; Gas-liquid Taylor flow; Inlet geometry; Interfacial area
Categories
Funding
- Region Rhone-Alpes
- CNRS
- Ecole de Chime Physique Electronique de Lyon (CPE Lyon)
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Effects of different T-junction injectors on the generation of a N-2-water Taylor flow has been investigated experimentally in a channel of 300 mu m by 300 mu m 4 different inlet geometries and 2 feeding configurations are evaluated in a wide range of fluid flow rates ratio 0 < Q(G)G/Q(perpendicular to) < 35 It has been demonstrated that for a given flow rate ratio different patterns of the unit cell (1bubble + 1 slug) can be formed showing the impact of inlet geometries An attempt to rationalize the result is proposed using a Garstecki-type scaling law for bubble length prediction A unique geometrically based scaling law is discussed and a quite good agreement is obtained to describe the whole set of experiments provided that there is no bubble coalescence L-bubble/W-G = 1 03 (W-G W-L/W-channel(2))(0 33) + 2 17 (W-G/W-L) U-G/U-L Finally an analysis in terms of specific interfacial area location (caps or bubble body) is proposed showing the Interest of such inlet geometries to tune this parameter for fixed fluid flow rates and opening new possibilities for local mass transfer studies in the G-L Taylor flow configuration in square micro channels (C) 2010 Elsevier B V All rights reserved
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