Abstract
The inverse cascade of the mean square potential in a 2D magnetofluid randomly forced at small scales is studied by numerical simulations. One finds the spectrum . The cascade proceeds by coalescence of current filaments, which is a fast reconnection process owing to high turbulent resistivity. Statistics of and are strictly Gaussian, also in the condensation phase of at . Only when the coherent magnetic field intensity exceeds that of the fluctuations, non-Gaussian statistics in occur, which are, however, entirely due to the static magnetic structure and not associated with intermittency of the small-scale turbulence, the latter remaining Gaussian.
- Received 6 October 1993
DOI:https://doi.org/10.1103/PhysRevLett.72.3819
©1994 American Physical Society