Data/hora: 01/06/2024 05:48:51

Provedor de dados: | 5
País: | France
Título: | Slow quasigeostrophic unstable modes of a lens vortex in a continuously stratified flow
Autores: | Nguyen, Hai Yen; Hua, Bach-lien; Schopp, Richard; Carton, Xavier.
Data: | 2012
Ano: | 2012
Palavras-chave: | Quasigeostrophic model; Vortices; Stratified flow; Critical level; Flow instability.
Resumo: | This work addresses the linear dynamics underlying the formation of density interfaces at the periphery of energetic vortices, well outside the vortex core, both in the radial and axial directions. We compute numerically the unstable modes of an anticyclonic Gaussian vortex lens in a continuously stratified rotating fluid. The most unstable mode is a slow mode, associated with a critical layer instability located at the vortex periphery. Although the most unstable disturbance has a characteristic vertical scale which is comparable to the vortex height, interestingly, the critical levels of the successively fastest growing modes are closely spaced at intervals along the axial direction that are much smaller than the vortex height.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00074/18520/16331.pdf

DOI:10.1080/03091929.2011.620568

Editor: | Taylor &amp; Francis Ltd
Relação: | http://archimer.ifremer.fr/doc/00074/18520/
Formato: | application/pdf
Fonte: | Geophysical And Astrophysical Fluid Dynamics (0309-1929) (Taylor &amp; Francis Ltd), 2012 , Vol. 106 , N. 3 , P. 305-319
Fonte: | 2012 Taylor &amp; Francis