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Dynamics of an inclined Vortex Ring interacting with a density stratification

Albagnac, Julie and Léard, Pierre and Anne-Archard, Dominique and Brancher, Pierre and Pinaud, Johan and Cazin, Sébastien and Rida, Zeinab Dynamics of an inclined Vortex Ring interacting with a density stratification. (2019) In: Environmental Fluid Dynamics: Confronting Grand Challenges, 20 January 2019 - 25 January 2019 (Les Houches, France). (Unpublished)

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Abstract

Vortex Rings are coherent vortical structures that dominate the dynamics of numerous flows as they are generated each time an impulsive jet occurs in a homogeneous fluid (for instance, plumes can be considered as Vortex Rings). Such structures have the faculty to self-propagate along their revolution axis, conferring them capacities of transport and mixing that could be exploited. Among applications, one can mention nuclear safety and the need to mix fluids of different density to prevent explosion hazard. The scope of the present study is to identify and evaluate the mixing mechanisms associated with a Vortex Ring interacting with a density stratification, in particular, the reorganization of the flow and the generation of internal waves. The influence of the Vortex Ring propagation speed and propagation angle relative to the density gradient on its dynamics and mixing power are studied thanks to 2D and 3D time-resolved TOMO-PIV.

Item Type:Conference or Workshop Item (Poster)
Audience (conference):International conference without published proceedings
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)
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Deposited On:10 Apr 2020 08:44

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