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Topology and dynamics of the A-pillar vortex

Levy, Benjamin and Brancher, Pierre Topology and dynamics of the A-pillar vortex. (2013) Physics of Fluids, 25 (3). 1-15. ISSN 1070-6631

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Official URL: http://dx.doi.org/10.1063/1.4792710

Abstract

The topology and dynamics of the flow bypassing an automobile A-pillar modeled by a 30° dihedron are investigated experimentally. The various components of the A-pillar flow are identified by means of low and high frequency particle image velocimetry. For each component, the time evolution of the position, displacement, vorticity magnitude, circulation, and fluctuating kinetic energy are analyzed along the A-pillar. More precisely, the flow by passing the A-pillar is composed of two vortex structures with different behaviors. The major structure grows in size, circulation magnitude, and total amount of fluctuating kinetic energy along the A-pillar, whereas the minor structure does not vary significantly. Finally, the displacement of the major structure is identified as a movement of precession and the influence of the A-pillar geometry is emphasized.

Item Type:Article
Additional Information:Thanks to AIP editor. The definitive version is available at http://scitation.aip.org The original PDF can be found at Physics of Fluids website: http://scitation.aip.org/content/aip/journal/pof2/25/3/10.1063/1.4792710
HAL Id:hal-00874271
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 - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Shanghai Jiao Tong University - SJTU (CHINA)
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Deposited On:17 Oct 2013 12:40

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