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An experimental and computational study of the vortex shape in a partially baffled agitated vessel

Torré, Jean-Philippe and Fletcher, David F. and Lasuye, Thierry and Xuereb, Catherine An experimental and computational study of the vortex shape in a partially baffled agitated vessel. (2007) Chemical Engineering Science, Vol.62 (n°7). pp. 1915-1926. ISSN 0009-2509

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Official URL: http://dx.doi.org/10.1016/j.ces.2006.12.020

Abstract

The vortex shape in a non-standard partially baffled agitated vessel in the form of a glass-lined, under-baffled stirred vessel has been investigated using both experimental and numerical approaches for an air/water system for different rotation speeds of the agitator. A simple and flexible experimental strategy was developed for determination of the time-averaged location of the unstable free surface using a process involving superimposition of images. CFD simulations were made to predict the vortex shape by using an Eulerian–Eulerian multiphase model coupled with a homogenous turbulence model. The simplifying assumptions of a constant bubble size, a constant drag coefficient and use of the k–ε turbulence model were made. An assessment of the capability of the numerical method to predict the vortex shape was carried out through comparison between experimental data and numerical results. Considering for comparison purposes a water isosurface volume fraction equal to 0.9, to account for the existence of air/water mixture present at the interface in the experiments, instead of the classical value of 0.5, gave very good agreement with the experimental data.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFK-4MNYYYT-1&_user=1072870&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=953515014&_rerunOrigin=google&_acct=C000043979&_version=1&_urlVersion=0&_userid=1072870&md5=8ea03d5bdd7b7edac2660768aa18fac3
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > University of Sydney (AUSTRALIA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > LVM (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By:Catherine XUEREB

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