| Issue |
Europhys. Lett.
Volume 49, Number 3, February I 2000
|
|
|---|---|---|
| Page(s) | 336 - 342 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2000-00501-8 | |
| Published online | 01 September 2002 | |
Inhomogeneous turbulence in the vicinity of a large-scale coherent vortex
Laboratoire de Physique de l'École Normale Supérieure de
Lyon, UMR 5672
46, Allée d'Italie, F-69007 Lyon, France
Corresponding author: pinton@physique.ens-lyon.fr
Received:
20
July
1999
Accepted:
18
November
1999
We study the statistics of turbulent velocity fluctuations in the neighbourhood of a strong large-scale vortex at large Reynolds number. At integral scale, the vortex dynamics can be either stable or unstable. We observe that at each distance from the vortex core, the velocity spectrum has a power law “inertial range” of scales and that intermittency is also present. The texture of turbulence is also influenced by the large-scale dynamics of the vortex: as measurements are made closer to the core the spectrum scaling exponents, the energy transfert rate (estimated via the third-order structure function) and the intermittency characteristics follow different evolutions in each regime.
PACS: 47.32.-y – Rotational flow and vorticity / 47.32.Cc – Vortex dynamics / 67.40.Vs – Vortices and turbulence
© EDP Sciences, 2000
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