Anisotropy in Quasi-Static Magnetohydrodynamic Turbulence

Abstract

In this review we summarise the current status of the quasi-static magnetohydrodynamic turbulence. The energy spectrum is steeper than Kolmogorov's k−5/3 spectrum due to the decrease of the kinetic energy flux with wavenumber k as a result of Joule dissipation. The spectral index decreases with the increase of interaction parameter. The flow is quasi two-dimensional with strong U⊥ at small k and weak U∥ at large k, where U⊥ and U∥ are the perpendicular and parallel components of velocity relative to the external magnetic field. For small k, the energy flux of U⊥ is negative, but for large k, the energy flux of U∥ is positive. Pressure mediates the energy transfer from U⊥ to U∥.