Transport of magnetic field by a turbulent flow of liquid sodium.
We study the effect of a turbulent flow of liquid sodium generated in the von Kármán geometry, on the localized field of a magnet placed close to the frontier of the flow. We observe that the field can be transported by the flow on distances larger than its integral length scale. In the most turbulent configurations, the mean value of the field advected at large distance vanishes. However, the rms value of the fluctuations increases linearly with the magnetic Reynolds number. The advected field is strongly intermittent.
Volk
R
R
Laboratoire de Physique de l'Ecole Normale Supérieure de Lyon, CNRS UMR 5672, 47 allée d'Italie, 69364 Lyon Cedex 07, France.
Ravelet
F
F
Monchaux
R
R
Berhanu
M
M
Chiffaudel
A
A
Daviaud
F
F
Odier
Ph
P
Pinton
J-F
JF
Fauve
S
S
Mordant
N
N
Pétrélis
F
F