Towards a rapidly rotating liquid sodium dynamo experiment - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Magnetohydrodynamics c/c of Magnitnaia Gidrodinamika Année : 2002

Towards a rapidly rotating liquid sodium dynamo experiment

Résumé

The main characteristics of the Earth's dynamo are reviewed. The combined actions of Coriolisand Lorentz forces lead to the so--called ``magnetostrophic'' regime. We derive an estimate of the power needed to sustain the magnetic field in this regime. We show that an experimentwith liquid sodium can be designed to operate in the magnetostrophic regime. Such an experiment would bring most valuable informations on the mechanisms of planetary dynamos. In order toprepare this large--scale experiment and explore the magnetostrophic balance, a smaller scale liquid sodium set--up has been designed and is being built. It consists of a rapidly rotating spherical shell filled with liquid sodium, in which motions are set by spinning at a different rotation rate an inner core permeated by a strong magnetic field. We discuss the processes that can be explored with this new device.
Fichier principal
Vignette du fichier
CBJN_Arxiv.pdf (1.22 Mo) Télécharger le fichier
Loading...

Dates et versions

hal-00000875 , version 1 (25-11-2003)

Identifiants

Citer

Philippe Cardin, Daniel Brito, Dominique Jault, Henri-Claude Nataf, Jean-Paul Masson. Towards a rapidly rotating liquid sodium dynamo experiment. Magnetohydrodynamics c/c of Magnitnaia Gidrodinamika, 2002, 38, pp.177-189. ⟨hal-00000875⟩
259 Consultations
364 Téléchargements

Partager

Gmail Facebook X LinkedIn More