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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2008

Reduction of velocity fluctuations in a turbulent flow of gallium by an external magnetic field

Résumé

The magnetic field of planets or stars is generated by the motion of a conducting fluid through a dynamo instability. The saturation of the magnetic field occurs through the reaction of the Lorentz force on the flow. In relation to this phenomenon, we study the effect of a magnetic field on a turbulent flow of liquid Gallium. The measurement of electric potential differences provides a signal related to the local velocity fluctuations. We observe a reduction of velocity fluctuations at all frequencies in the spectrum when the magnetic field is increased.

Dates et versions

hal-00712172 , version 1 (26-06-2012)

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Michael Berhanu, Basile Gallet, Nicolas Mordant, Stephan Fauve. Reduction of velocity fluctuations in a turbulent flow of gallium by an external magnetic field. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2008, pp.015302. ⟨10.1103/PhysRevE.78.015302⟩. ⟨hal-00712172⟩
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