F
François Pétrélis
Researcher at École Normale Supérieure
Publications - 92
Citations - 2448
François Pétrélis is an academic researcher from École Normale Supérieure. The author has contributed to research in topics: Dynamo & Magnetic field. The author has an hindex of 21, co-authored 89 publications receiving 2271 citations. Previous affiliations of François Pétrélis include Centre national de la recherche scientifique & Pierre-and-Marie-Curie University.
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Journal ArticleDOI
Generation of a magnetic field by dynamo action in a turbulent flow of liquid sodium.
Romain Monchaux,Michael Berhanu,Mickaël Bourgoin,Marc Moulin,Philippe Odier,Jean-François Pinton,Romain Volk,Stéphan Fauve,Nicolas Mordant,François Pétrélis,Arnaud Chiffaudel,François Daviaud,Bérengère Dubrulle,Cécile Gasquet,Louis Marié,Florent Ravelet +15 more
TL;DR: The observation of dynamo action in the von Kármán sodium experiment, i.e., the generation of a magnetic field by a strongly turbulent swirling flow of liquid sodium, is reported.
Journal ArticleDOI
Magnetic field reversals in an experimental turbulent dynamo
Michael Berhanu,Romain Monchaux,Stéphan Fauve,Nicolas Mordant,François Pétrélis,A. Chiffaudel,François Daviaud,Bérengère Dubrulle,L. Marie,Florent Ravelet,Mickaël Bourgoin,Philippe Odier,Jean-François Pinton,Romain Volk +13 more
TL;DR: In this article, the first experimental observation of reversals of a dynamo field generated in a laboratory experiment based on a turbulent flow of liquid sodium was reported, where the magnetic field randomly switches between two symmetric solutions B and -B.
Journal ArticleDOI
Simple mechanism for reversals of earth's magnetic field.
TL;DR: A model recently used to describe all the dynamical regimes of the magnetic field generated by the dynamo effect in the von Kármán sodium experiment also provides a simple explanation of the reversals of Earth's magnetic field, despite strong differences between both systems.
Journal ArticleDOI
The von Karman Sodium experiment: Turbulent dynamical dynamos
Romain Monchaux,Michael Berhanu,Sébastien Aumaître,Arnaud Chiffaudel,François Daviaud,Bérengère Dubrulle,Florent Ravelet,Stéphan Fauve,Nicolas Mordant,François Pétrélis,Mickaël Bourgoin,Philippe Odier,Jean-François Pinton,Nicolas Plihon,Romain Volk +14 more
TL;DR: In this article, the self-generation of a stationary dynamo when the flow forcing is R-pi-symmetric, i.e., when the impellers rotate in opposite directions at equal angular velocities, is studied.
Journal ArticleDOI
Tidal Conversion at a Submarine Ridge
TL;DR: In this article, the radiative flux of internal wave energy (the "tidal conversion") powered by the oscillating flow of a uniformly stratified fluid over a two-dimensional submarine ridge is computed using an integral-equation method.