Wavelet Analysis of Two-Dimensional MHD Turbulence

Abstract

The wavelet analysis is performed on the numerical results of two-dimensional magnetohydrodynamic (MHD) turbulence. By virtue of simultaneous resolutionin scale and position of wavelet decomposition, the intermittent nature is well captured. The whole region is successfully divided into the two regions with different inertial subranges of energy spectra: the turbulent region with E_T(k) ∝ k^-3/2 and the coherent region with E_T(k) ∝ k^-2. The local energy transfers by convection of velocity field and by stretching of magnetic field are probably responsible for the transition of turbulent state into coherent state.