Rapid generation of angular momentum in bounded magnetized plasma
Direct numerical simulations of two-dimensional decaying MHD turbulence in bounded domains show the rapid generation of angular momentum in nonaxisymmetric geometries. It is found that magnetic fluctuations enhance this mechanism. On a larger time scale, the generation of a magnetic angular momentum, or angular field, is observed. For axisymmetric geometries, the generation of angular momentum is absent; nevertheless, a weak magnetic field can be observed. The derived evolution equations for both the angular momentum and angular field yield possible explanations for the observed behavior.
Wouter J.T. Bos, Salah Neffaa, Kai Schneider. Rapid generation of angular momentum in bounded magnetized plasma. Physical Review Letters, 2008, 101, pp.235003. ⟨10.1103/PhysRevLett.101.235003⟩. ⟨hal-00442512⟩
Journal: Physical Review Letters
Date de publication: 01-01-2008
Auteurs:
-
Wouter J.T. Bos
-
Salah Neffaa
- Kai Schneider