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Mass-Transfer Enhancement by a Reversible Chemical Reaction Across the Interface of a Bubble Rising Under Stokes Flow

Pigeonneau, Franck and Perrodin, Marion and Climent, Éric Mass-Transfer Enhancement by a Reversible Chemical Reaction Across the Interface of a Bubble Rising Under Stokes Flow. (2014) AIChE Journal, 60 (9). 3376-3388. ISSN 0001-1541

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Official URL: http://dx.doi.org/10.1002/aic.14520

Abstract

Mass transfer around a bubble rising in a liquid under Stokes regime is investigated when a reversible chemical reaction, A !B, is taken into account. Four dimensionless parameters control the interfacial transfer rate: the Peclet and Damkohler numbers, the ratio of the diffusion coefficient of both species, and the reaction equilibrium constant. The € mass-transfer equations are solved numerically with a finite element technique. A boundary layer approach is also proposed and solved with a coupled technique of finite difference and Chebyshev-spectral method. The equilibrium constant and the ratio of diffusion coefficients have a strong influence on the coupling between the chemical reaction and mass transfer leading to an increase of the Sherwood number. The interaction between the chemical reaction and advection is clearly established by the simulations. Conditions corresponding to Peclet number larger than the Damkohler number reduces the effect of the chemical reaction.

Item Type:Article
Additional Information:Thanks to Wiley editor. The definitive version is available at http://onlinelibrary.wiley.com The original PDF of the article can be found at : http://onlinelibrary.wiley.com/doi/10.1002/aic.14520/full
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 - INPT (FRANCE)
Other partners > Saint-Gobain (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
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Deposited By: Eric CLIMENT
Deposited On:15 Apr 2016 12:21

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