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Fractal Kelvin-Helmholtz break-ups

Fontane, Jérôme and Joly, Laurent and Reinaud, Jean Fractal Kelvin-Helmholtz break-ups. (2007) In: American Physical Society/Division Fluid Dynamics Annual Meeting, Nov 2007, Salt Lake City, United States .

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Abstract

We carry out numerical simulations of the temporally-evolving infinite-Schmidt number mixing-layer between density-contrasted streams (ρblack/ρwhite = 3). The primary KH-billow is seeded with an eigen-perturbation at t=18. As hinted by Reinaud, Joly and Chassaing (Phys. Fluids 2000), a secondary instability develops on the light side of the main structure. If seeded earlier at t=13, the secondary instability develops on a longer wavelength. The larger central secondary billow break-ups in ternary roll-ups due to the same mechanism as the previous generation. The growing demand for spatial resolution requires that the last stages be resolved on a 10 000 X 10 000 grid.

Item Type:Conference or Workshop Item (Poster)
Audience (conference):International conference without published proceedings
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Institution: Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Other partners > University of St Andrews (UNITED KINGDOM)
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Deposited By: Laurent JOLY

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