Authors
Jungyeon Cho, Ethan T Vishniac
Publication date
2000/8/10
Journal
The Astrophysical Journal
Volume
539
Issue
1
Pages
273
Publisher
IOP Publishing
Description
We perform direct three-dimensional numerical simulations for magnetohydrodynamic (MHD) turbulence in a periodic box of size 2 π threaded by strong uniform magnetic fields. We use a pseudospectral code with hyperviscosity and hyperdiffusivity to solve the incompressible MHD equations. We analyze the structure of the eddies as a function of scale. A straightforward calculation of anisotropy in wavevector space shows that the anisotropy is scale independent. We discuss why this is not the true scaling law and how the curvature of large-scale magnetic fields affects the power spectrum and leads to the wrong conclusion. When we correct for this effect, we find that the anisotropy of eddies depends on their size: smaller eddies are more elongated than larger ones along local magnetic field lines. The results are consistent with the scaling law∥∼ recently proposed by Goldreich & Sridhar. Here∥(and⊥) are …
Total citations
Scholar articles
J Cho, ET Vishniac - The Astrophysical Journal, 2000