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| Titel |
Experimental study of long nonlinear internal waves in rotating fluid |
| VerfasserIn |
Dominique Renouard, Jean-Pierre Germain |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 12, no. 2/3 ; Nr. 12, no. 2/3, S.254-264 |
| Datensatznummer |
250010327
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| Publikation (Nr.) |
 copernicus.org/angeo-12-254-1994.pdf |
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| Zusammenfassung |
| Experiments were performed on the rotating
platform 14 m in diameter equipped with a simple internal wave generator.
Internal waves were generated for a wide range of Coriolis parameters. When the
rotation is very weak, i.e., when the internal Rossby radius of deformation is
much larger than the wavelength, then the stable nonlinear waves generated are
solitary waves. These have a horizontal crest, as in the nonrotating case. When
the rotation is strong, i.e., when the internal Rossby radius is at most
comparable with the wavelength, then Sverdrup-like periodic waves can be
generated, but no solitary wave can then propagate. For the intermediate case,
Ostrovsky waves are generated. Their phase speed increases with increasing
amplitude. Then, there are two characteristic wave lengths: one which varies
with the inverse square root of the amplitude, as for the KdV wave, and the
other, linked with the rotation, which varies as the square root of the
amplitude. The experimental results are thus in agreement with most of the
conclusions in recent analytical developments. |
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