Article (Scientific journals)
Laminar flow in radial flow cell with small aspect ratios: Numerical and experimental study
Detry, Jean; Deroanne, Claude; Sindic, Marianne et al.
2009In Chemical Engineering Science, 64 (1), p. 31-42
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Keywords :
Radial flow chamber; Stagnation point flow chamber; Hydrodynamics; Computation; Visualisation; Fluid mechanics
Abstract :
[en] Studies on the effect of wall shear stress on soil and biofilm attachment and removal from a surface are one of the many applications of radial axisymmetrical flow. The particular nature of this flow allows taking advantage of a wide range of wall shear Stress applied at the analyzed surface in a single experiment. This type of experiments provides a critical radius up to which soil removal occurs. Good models are, however, still needed to convert the experimental data into critical wall shear stress. Analytical models are already available for creeping flow but Computational Fluid Dynamics must be applied for experiments performed at higher Reynolds numbers. The present study is a numerical analysis of the radial axisymmetrical flow for aspect ratios of 0.125, 0.25, 0.5 and 1 with inlet pipe Reynolds numbers varying from 0 to 2000, aiming at computing the wall shear stress distribution at any distance from the center. The simulations provided a thorough description of the complex flow pattern encountered close to the inlet section, which were validated for the laminar regime by dye injection. A total of up to four recirculation zones were identified in both numerical and experimental investigations. The experimental positions of these recirculation zones corresponded well to the numerical predictions. Based on this work, a map of the flow for the different aspect ratios was developed, which can be particularly interesting for the design of experimental devices involving axisymmetrical flow. (c) 2008 Elsevier Ltd. All rights reserved.
Disciplines :
Chemical engineering
Author, co-author :
Detry, Jean;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Unité de Technologie des IAA
Deroanne, Claude ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Unité de Technologie des IAA
Sindic, Marianne  ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Unité de Technologie des IAA
Jensen, B. B. B.
Language :
English
Title :
Laminar flow in radial flow cell with small aspect ratios: Numerical and experimental study
Publication date :
2009
Journal title :
Chemical Engineering Science
ISSN :
0009-2509
eISSN :
1873-4405
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
Volume :
64
Issue :
1
Pages :
31-42
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 31 August 2010

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