Microfluidics and Nanofluidics

, Volume 19, Issue 3, pp 523–545 | Cite as

Bubbly flow and gas–liquid mass transfer in square and circular microchannels for stress-free and rigid interfaces: CFD analysis

  • David MikaelianEmail author
  • Benoît Haut
  • Benoit Scheid
Research Paper


In this paper, the dynamics of bubbles and the mass transfer between bubbles and the surrounding liquid in square and circular microchannels are investigated, in the bubbly flow regime. For this purpose, a computational fluid dynamics analysis is used to carry out numerical simulations of the liquid flow and the mass transport around a spherical bubble in a square or a circular microchannel, for a stress-free or a rigid gas–liquid interface. The corresponding results are consolidated into correlations to calculate the bubble velocity and the interfacial rate of mass transfer as functions of the control parameters of the system. For each considered case, the flow structure, the concentration field around the bubble and the local interfacial rate of mass transfer are presented and shown to be intricately related.


Microfluidics Absorption Square microchannel  Circular microchannel Bubbles Spherical bubbles CFD 



The authors gratefully acknowledge Louise De Cannière for her assistance in numerical simulations. The authors also acknowledge Jean-Christophe Baret, Charles Baroud and Pierre Miquel for fruitful discussions. D.M. and B.S. acknowledge the Fonds de la Recherche Scientifique (F.R.S.–F.N.R.S.) for its financial support. This research has been performed under the umbrella of the COST action MP1106 and also took part in the Inter-university Attraction Pole Programme (IAP 7/38 MicroMAST) initiated by the Belgian Science Policy Office.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Transfers, Interfaces and Processes (TIPs), CP 165/67Université libre de BruxellesBrusselsBelgium

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