Intermittency in spherical Couette dynamos | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  Intermittency in spherical Couette dynamos

Type de publication:

Journal Article

Source:

Physical Review E, Volume 87, Ticket 3 (2013)

ISBN:

1539-3755

URL:

http://pre.aps.org/abstract/PRE/v87/i3/e033011

Mots-clés:

Géomagnétisme, UMR 7154

Résumé:

We investigate dynamo action in three-dimensional numerical simulations of turbulent spherical Couette flows. Close to the onset of dynamo action, the magnetic field exhibits an intermittent behavior, characterized by a series of short bursts of the magnetic energy separated by low-energy phases. We show that this behavior corresponds to the so-called on-off intermittency. This behavior is here reported for dynamo action with realistic boundary conditions. We investigate the role of magnetic boundary conditions in this phenomenon.

Notes:

Times Cited: 0