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Chaotic dynamos generated by a turbulent flow of liquid sodium

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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Submitted on : Tuesday, June 15, 2010 - 4:15:17 PM
Last modification on : Thursday, March 17, 2022 - 10:08:09 AM
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Florent Ravelet, Michaël Berhanu, Romain Monchaux, Sébastien Aumaître, Arnaud Chiffaudel, et al.. Chaotic dynamos generated by a turbulent flow of liquid sodium. Physical Review Letters, American Physical Society, 2008, 101 (7), pp.074502. ⟨10.1103/PhysRevLett.101.074502⟩. ⟨hal-00492315⟩

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