Chaotic Dynamos Generated by a Turbulent Flow of Liquid Sodium

F. Ravelet, M. Berhanu, R. Monchaux, S. Aumaître, A. Chiffaudel, F. Daviaud, B. Dubrulle, M. Bourgoin, Ph. Odier, N. Plihon, J.-F. Pinton, R. Volk, S. Fauve, N. Mordant, and F. Pétrélis
Phys. Rev. Lett. 101, 074502 – Published 14 August 2008

Abstract

We report the observation of several dynamical regimes of the magnetic field generated by a turbulent flow of liquid sodium (VKS experiment). Stationary dynamos, transitions to relaxation cycles or to intermittent bursts, and random field reversals occur in a fairly small range of parameters. Large scale dynamics of the magnetic field result from the interactions of a few modes. The low dimensional nature of these dynamics is not smeared out by the very strong turbulent fluctuations of the flow.

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  • Received 1 April 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.074502

©2008 American Physical Society

Authors & Affiliations

F. Ravelet1, M. Berhanu2, R. Monchaux1, S. Aumaître1, A. Chiffaudel1, F. Daviaud1, B. Dubrulle1, M. Bourgoin3, Ph. Odier3, N. Plihon3, J.-F. Pinton3, R. Volk3, S. Fauve2, N. Mordant2, and F. Pétrélis2

  • 1Service de Physique de l’Etat Condensé, Direction des Sciences de la Matière, CEA-Saclay, CNRS URA 2464, 91191 Gif-sur-Yvette cedex, France
  • 2Laboratoire de Physique Statistique de l’Ecole Normale Supérieure, CNRS UMR 8550, 24 Rue Lhomond, 75231 Paris Cedex 05, France
  • 3Laboratoire de Physique de l’Ecole Normale Supérieure de Lyon, CNRS UMR 5672, 46 allée d’Italie, 69364 Lyon Cedex 07, France

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Issue

Vol. 101, Iss. 7 — 15 August 2008

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