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3D measurements of inclined vortex rings interacting with a density stratification

Pinaud, Johan and Albagnac, Julie and Brancher, Pierre and Cazin, Sébastien and Rida, Zeinab 3D measurements of inclined vortex rings interacting with a density stratification. (2019) In: 72nd Annual Meeting of the APS Division of Fluid Dynamics, 23 November 2019 - 26 November 2019 (Seattle, United States).

(Document in English)

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Official URL: https://meetings.aps.org/Meeting/DFD19/Session/Q39.1


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. They are also considered as elementary bricks of turbulence. Their faculty to propagate along their revolution axis by self-induction confers to such structures interesting transport properties, namely, transport of momentum, mass and heat. They are therefore often qualified as good candidates for mixing. From this perspective, the present study addresses the interaction of a vortex ring with a density stratification in order to get a better understanding of the subsequent mixing mechanisms. A new 3D time-resolved technique is used and gives a highlight at short timescale on the 3D vorticity reorganization and at larger timescale on the 3D patterns of internal gravity waves forced by the impacting/penetrating vortex. The influence of the Reynolds number of the vortex ring and its angle of attack relative to isopycnals will be detailed.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference 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)
Laboratory name:
Deposited On:11 May 2020 14:40

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