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Vortex rings in non-Newtonian viscoelastic fluids play yo-yo

Albagnac, Julie and Laupsien, David and Anne-Archard, Dominique Vortex rings in non-Newtonian viscoelastic fluids play yo-yo. (2014) In: 67th Annual Meeting of the APS Division of Fluid Dynamics, 23 November 2014 - 25 November 2014 (San Francisco, United States). (Unpublished)

(Document in English)

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Vortex rings are coherent vortical structures widely presents in geophysical flows and engineering applications. Numerous applications imply industrial processes including food processing, or petrol industry. Those applications are very often confronted with non-Newtonian fluids. Nevertheless, to the best of our knowledge, only few studies dealing with vortex dynamics in non-Newtonian shear-thinning fluids exist, and none with viscoelastic ones. The aim for the present study is to characterize experimentally the dynamics of vortex rings generated thanks to a piston-cylinder apparatus in various viscoelastic fluids as a function of the generalized Reynolds number, the piston stroke and the final piston position relative to the cylinder exit. In particular, the elastic property of the fluid will be highlighted by the furling-unfurling of vortex rings.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference without published proceedings
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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:18 Feb 2015 10:25

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