| Issue |
Europhys. Lett.
Volume 59, Number 6, September II 2002
|
|
|---|---|---|
| Page(s) | 827 - 833 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2002-00117-6 | |
| Published online | 01 September 2002 | |
Instability of a confined jet impinging on a water/air free surface
1
Institut de Mécanique des Fluides et des Solides de Strasbourg
UMR CNRS/ULP 7507 - 2 rue Boussingault, 67000 Strasbourg,
France
2
Laboratoire Ondes et Acoustique, UMR CNRS 7587, ESPCI
10 rue Vauquelin, 75231 Paris Cedex 05, France
Received:
25
April
2002
Accepted:
20
June
2002
Self-sustained oscillations in sinuous mode occur when a water jet impinges from below on a water/air free surface. Confined jet instability is experimentally investigated by image processing and velocity measurements. Despite small deformations of the surface, dynamic response of the jet provides unusual behaviour with comparable configurations (hole-tone, jet edge ...). The central feature is a bounded evolution of the oscillation frequency. Modal transitions are observed when physical parameters are varied. Each frequency jump is related to wavelength modification of the spatial pattern. Atypical evolution of the predominant length scale has to be connected to strong coupling with the weak deformations induced by the impinging jet on the free surface.
PACS: 47.15.Rq – Laminar flows in cavities / 47.54.+r – Pattern selection; pattern formation / 47.20.-k – Hydrodynamic stability
© EDP Sciences, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.