Abstract
Weak magnetohydrodynamic turbulence in the presence of a uniform magnetic field is dominated by three-wave interactions that mediate the collisions of shear-Alfvén wave packets propagating in opposite directions parallel to the magnetic field. The scaling of three-wave couplings is calculated by asymptotic analysis and a direct numerical evaluation of the nonlinear interaction based on the reduced magnetohydrodynamic equations. A new relation is derived between the spectral index of three-wave coupling and the spectral indices of two random-amplitude wave packets. This relation has significant implications for the anisotropic energy spectrum.
Original language | English (US) |
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Pages (from-to) | 605-610 |
Number of pages | 6 |
Journal | Physics of Plasmas |
Volume | 4 |
Issue number | 3 |
DOIs | |
State | Published - 1997 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics