4 citations · 9 across the 5 of their papers we have counts for
5 papers
Stochastic bifurcations: a perturbative study
Sebastien Aumaitre, Kirone Mallick, Francois Petrelis
We study a noise-induced bifurcation in the vicinity of the threshold by using a perturbative expansion of the order parameter, called the Poincaré-Lindstedt expansion. Each term o…
Excitability in the vicinity of a saddle-node bifurcation: a mechanism for reversals
F. Petrelis, S. Fauve
We present a new mechanism for oscillatory or random reversals of the magnetic field that occur from a stationary dynamo state. The basic ingredient is the existence of two nearly…
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…
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…
The alpha effect and its saturation in a turbulent swirling flow generated in the VKS experiment
F. Petrelis, M. Bourgoin, L. Marie +6
We report the experimental observation of the alpha-effect. It consists in the generation of a current parallel to a magnetic field B0 applied to a turbulent swirling flow of liqui…