Intensity of vortices: from soap bubbles to hurricanes
BRUNEAU, Charles-Henri
Institut de Mathématiques de Bordeaux [IMB]
Modélisation, contrôle et calcul [MC2]
< Réduire
Institut de Mathématiques de Bordeaux [IMB]
Modélisation, contrôle et calcul [MC2]
Langue
en
Article de revue
Ce document a été publié dans
Scientific Reports. 2013-12-13, vol. 3, p. 3455 (1-7)
Nature Publishing Group
Résumé en anglais
By using a half soap bubble heated from below, we obtain large isolated single vortices whose properties as well as their intensity are measured under different conditions. By studying the effects of rotation of the bubble ...Lire la suite >
By using a half soap bubble heated from below, we obtain large isolated single vortices whose properties as well as their intensity are measured under different conditions. By studying the effects of rotation of the bubble on the vortex properties, we found that rotation favors vortices near the pole. Rotation also inhibits long life time vortices. The velocity and vorticity profiles of the vortices obtained are well described by a Gaussian vortex. Besides, the intensity of these vortices can be followed over long time spans revealing periods of intensification accompanied by trochoidal motion of the vortex center, features which are reminiscent of the behavior of tropical cyclones. An analysis of this intensification period suggests a simple relation valid for both the vortices observed here and for tropical cyclones.< Réduire
Mots clés en anglais
Atmospheric dynamics
fluid dynamics
surfaces
interfaces and thin films
climate and earth system modelling
Origine
Importé de halUnités de recherche