M
Michael Berhanu
Researcher at Paris Diderot University
Publications - 70
Citations - 1908
Michael Berhanu is an academic researcher from Paris Diderot University. The author has contributed to research in topics: Turbulence & Magnetic field. The author has an hindex of 20, co-authored 67 publications receiving 1659 citations. Previous affiliations of Michael Berhanu include École Normale Supérieure & Clark 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
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
Speed of a swimming sheet in Newtonian and viscoelastic fluids.
Moumita Dasgupta,Bin Liu,Henry C. Fu,Henry C. Fu,Michael Berhanu,Michael Berhanu,Kenneth S. Breuer,Thomas R. Powers,Arshad Kudrolli +8 more
TL;DR: The swimming speed of a cylindrical version of Taylor's swimming sheet in viscoelastic fluids is measured, and it is found that depending on the rheology, the speed can either increase or decrease relative to the speed in a Newtonian viscous fluid.
Journal ArticleDOI
Chaotic Dynamos Generated by a Turbulent Flow of Liquid Sodium
Florent Ravelet,Michael Berhanu,Romain Monchaux,Sébastien Aumaître,Arnaud Chiffaudel,F. Daviaud,Bérengère Dubrulle,Mickaël Bourgoin,P. Odier,Nicolas Plihon,Jean-François Pinton,Romain Volk,Stéphan Fauve,Nicolas Mordant,François Pétrélis +14 more
TL;DR: The observation of several dynamical regimes of the magnetic field generated by a turbulent flow of liquid sodium (VKS experiment) shows the low dimensional nature of these dynamics is not smeared out by the very strong turbulent fluctuations of the flow.