6 datasets found

soumis au Comptes Rendus Physique

This thesis is part of the general study of self-organization in hot and magnetized plasmas. We focus our work on two specific objects : stars and tokamaks. We use...

The main characteristics of the Earth's dynamo are reviewed. The combined actions of Coriolisand Lorentz forces lead to the so--called ``magnetostrophic'' regime. We...

This PhD thesis deals with several problems relative to the dynamo instability in liquid metals turbulent flows. This instability converts kinetic energy into magnetic...

The effect of velocity fluctuations on the threshold of the dynamo effect, the magnetic induction, and also the non-linear behaviors in the saturation regime are...

Stars formation occurs in several steps. First a large scale phase during which the molecular cloud undergo fragmentation due to its self-gravity and turbulence. In...