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Educing coherent eddy structures in air curtain systems

Loubiere, Karine and Pavageau, Michel Educing coherent eddy structures in air curtain systems. (2008) Chemical Engineering and Processing, vol. 4 (n° 3). pp. 435-448. ISSN 0255-2701

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Official URL: http://dx.doi.org/10.1016/j.cep.2007.01.014

Abstract

The work reported here comes within a broader research program dealing with ambiance separation or confining by means of air curtains (plane air jets). The process is studied experimentally by Particle Image Velocimetry (PIV). In this paper, the emphasis is put on the flow structure in the impingement region of such jet systems insofar as it is where transfers occur preferentially. More precisely, a vortex eduction method was implemented under the Matlab environment enabling both the automatic detection of 2D coherent patterns embedded in PIV velocity vector maps, and a statistical analysis of the topological and energy features of these structures. First, the approach is explained in detail. The second part of this paper is devoted to its application in the case of plane turbulent impinging simple- and twin-jets for various jet exit velocities. Results about the size, the shape, the spatial distribution and the energy content of the detected vortices are provided. Although many questions still remain open, new insights into the fashion these structures might form, organize and evolve are given providing an original picture of the plane turbulent impinging jet.

Item Type:Article
Additional Information:This publication is available at http://www.sciencedirect.com/science/journal/02552701
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Université de Nantes (FRANCE)
Other partners > Ecole des Mines de Nantes (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Ecole Nationale d'Ingénieurs des Techniques des Industries Agricoles et Alimentaires - ENITIAA (FRANCE)
Laboratory name:
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Deposited By: Karine LOUBIERE
Deposited On:06 Jan 2010 14:52

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