Laboratory experiments on mountaininduced rotors

C. Etling 1 D. Paci 1 A. Eiff 2 O. Knigge 3, *
* Corresponding author
1 IMUK - Institut für Meteorologie und Klimatologie [Hannover]
2 CNRM-GAME - Groupe d'étude de l'atmosphère météorologique
3 IMFT - Institut de mécanique des fluides de Toulouse
Abstract : In this article we present some laboratory experiments on stratified flows over isolated obstacles which were aimed at the simulation of atmospheric rotors as induced by the interaction of mountain waves and the boundary layer. For this purpose we modified the classical tank experiments on mountain waves performed with constant density gradients by introducing an elevated density inversion above the obstacle height. This kind of inversion seems to favour very much the development of mountain-induced rotors as was shown in recent numerical simulations. In fact our experimental set-up was guided by the simulations of Vosper, which provided systematically the upstream conditions under which mountain rotors are expected. We were able to confirm the results from these numerical simulations over a wide range of parameters. Detailed analyses of flow structures for some selected cases, as obtained by particle image velocimeter analysis, are presented. Copyright © 2010 Royal Meteorological Society
Mots-clés : atmosphère couche limite de surface ondes influence du relief mécanique des fluides
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Journal articles
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Submitted on : Tuesday, March 16, 2010 - 6:32:49 PM
Last modification on : Friday, October 11, 2019 - 8:22:31 PM

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C. Etling, D. Paci, A. Eiff, O. Knigge. Laboratory experiments on mountaininduced rotors. Quarterly Journal of the Royal Meteorological Society, Wiley, 2010, 136, pp.PP. 442-450. ⟨10.1002/qj.564⟩. ⟨meteo-00464348⟩

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