Article Dans Une Revue EAS Publications Series Année : 2019

The turbulent response to tidal and libration forcing

Résumé

In conjunction with thermo-solutal convection, the turbulence generated in planetary liquid cores may be due to the role of boundary forcing through geophysically relevant mechanisms such as precession, libration and tidal forcing (Le Bars et al. 2015). In this paper, we discuss laboratory equatorial velocity measurements and selected high-resolution numerical simulations to show the generation of developed turbulence driven by longitudinal libration or tidal forcing. In both cases, the transition to saturated turbulence is driven by an elliptical instability that excites inertial modes of the system. We find striking similarities in both the transition to bulk turbulence and the enhanced zonal flow hinting at a generic fluid response independent of the forcing mechanism. We finally discuss the relevance of this work to the planetary regime and possible directions for future investigations.

Fichier principal
Vignette du fichier
eas1982005.pdf (639.56 Ko) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence
Loading...

Dates et versions

hal-02569753 , version 1 (11-05-2020)

Licence

Identifiants

Citer

B. Favier, A. Grannan, T. Le Reun, J. Aurnou, M. Le Bars. The turbulent response to tidal and libration forcing. EAS Publications Series, 2019, 82, pp.51-58. ⟨10.1051/eas/1982005⟩. ⟨hal-02569753⟩
69 Consultations
82 Téléchargements

Altmetric

Partager

  • More