419 citations · 1.1k across the 32 of their papers we have counts for
7 papers · 1 filter
Noise-induced bifurcations, Multiscaling and On-Off intermittency
Sebastien Aumaitre, Francois Petrelis, Kirone Mallick
We present recent results on noise-induced transitions in a nonlinear oscillator with randomly modulated frequency. The presence of stochastic perturbations drastically alters the…
On the magnetic fields generated by experimental dynamos
F. Petrelis, N. Mordant, S. Fauve
We review the results obtained by three successful fluid dynamo experiments and discuss what has been learnt from them about the effect of turbulence on the dynamo threshold and sa…
Effects of the low frequencies of noise on On-Off intermittency
Sebastien Aumaitre, Kirone Mallick, Francois Petrelis
A bifurcating system subject to multiplicative noise can exhibit on-off intermittency close to the instability threshold. For a canonical system, we discuss the dependence of this…
Magnetic induction in a turbulent flow of liquid sodium: mean behaviour and slow fluctuations
F. Ravelet, R. Volk, A. Chiffaudel +10
We study the flow response to an externally imposed homogeneous magnetic field in a turbulent swirling flow of liquid sodium -- the VKS2 experiment in which magnetic Reynolds numbe…
Scaling laws of turbulent dynamos
Stephan Fauve, Francois Petrelis
We consider magnetic fields generated by homogeneous isotropic and parity invariant turbulent flows. We show that simple scaling laws for dynamo threshold, magnetic energy and Ohmi…
Magnetic field reversals in an experimental turbulent dynamo
M. Berhanu, R. Monchaux, S. Fauve +11
We report the first experimental observation of reversals of a dynamo field generated in a laboratory experiment based on a turbulent flow of liquid sodium. The magnetic field rand…
Generation of magnetic field by dynamo action in a turbulent flow of liquid sodium
R. Monchaux, M. Berhanu, M. Bourgoin +13
We report the observation of dynamo action in the VKS experiment, i.e., the generation of magnetic field by a strongly turbulent swirling flow of liquid sodium. Both mean and fluct…