Anisotropic spectra of acoustic type turbulence

Kuznetsov, E.; Krasnoselskikh, V.
June 2008
Physics of Plasmas;Jun2008, Vol. 15 Issue 6, p062305
Academic Journal
The problem of spectra for acoustic type of turbulence generated by shocks being randomly distributed in space is considered. It is shown that for turbulence with a weak anisotropy, such spectra have the same dependence in k-space as the Kadomtsev–Petviashvili spectrum: E(k)∼k-2. However, the frequency spectrum has always the falling ∼ω-2, independent of anisotropy. In the strong anisotropic case the energy distribution relative to wave vectors takes anisotropic dependence, forming in the large-k region spectra of the jet type.


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