Duran-Matute, Matias and Albagnac, Julie and Kamp, Leon P.J. and Van Heijst, Gert Jan F. Dynamics and structure of decaying shallow dipolar vortices. (2010) Physics of Fluids, 22 (11). ISSN 1070-6631
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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 9MB |
Official URL: http://dx.doi.org/10.1063/1.3518468
Abstract
The current work reports on a numerical and experimental study of the evolution of decaying dipolar vortices in a shallow fluid layer. The dynamics and the structure of such vortices are investigated as a function of both their Reynolds number Re and the aspect ratio of vertical and horizontal length scales δ. By quantifying the strength of the secondary motions (vertical motions and nonzero horizontal divergence) with respect to the swirling motions of the primary vortex cores, it was found that the three-dimensionality of a shallow (δ << 1) dipolar vortex only depends on a single parameter: δ²Re. Depending on the value of this parameter, three flow regimes are observed for shallow dipolar vortices: (1) a quasi-two-dimensional regime where the structure of the dipolar vortex remains almost unchanged throughout its lifetime, (2) a transitional regime where the structure presents some three-dimensional characteristics but remains coherent, and (3) a three-dimensional regime where the structure of the dipolar vortex acquires a complicated three-dimensional shape with a persistent spanwise vortex at its front.
Item Type: | Article |
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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/pof2/22/11/10.1063/1.3518468 |
HAL Id: | hal-00874729 |
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 > Eindhoven University of Technology - TU/e (NETHERLANDS) |
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Funders: | Universite Paul Sabatier Toulouse III |
Statistics: | download |
Deposited On: | 18 Oct 2013 12:24 |
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