SCALING LAWS AND DIFFUSE LOCALITY OF BALANCED AND IMBALANCED MAGNETOHYDRODYNAMIC TURBULENCE
- Department of Astronomy, University of Wisconsin, Madison, WI 53706 (United States)
The search of ways to generalize the theory of strong MHD turbulence for the case of non-zero cross-helicity (or energy imbalance) has attracted considerable interest recently. In our earlier publications, we performed three-dimensional numerical simulations and showed that some of the existing models are inconsistent with numerics. In this Letter, we focused our attention on low-imbalance limit and performed new high-resolution simulations. The results strongly suggest that in the limit of small imbalances we smoothly transition to a standard Goldreich-Sridhar balanced model. We also claim that the Perez-Boldyrev model that predicts the same nonlinear timescale for both components due to the so-called dynamic alignment strongly contradicts numerical evidence.
- OSTI ID:
- 21452747
- Journal Information:
- Astrophysical Journal Letters, Vol. 722, Issue 1; Other Information: DOI: 10.1088/2041-8205/722/1/L110; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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