Anisotropic spectra of acoustic type turbulence

E. Kuznetsov (1, 2) , Vladimir Krasnoselskikh (1)

1 LPCE - Laboratoire de physique et chimie de l'environnement
2 LPI RAS - P. N. Lebedev Physical Institute of the Russian Academy of Sciences [Moscow]

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

Domaines: Physique des plasmas [physics.plasm-ph]; Acoustique [physics.class-ph]

E. Kuznetsov, Vladimir Krasnoselskikh. Anisotropic spectra of acoustic type turbulence. Physics of Plasmas, 2008, 15 (6), pp.062305. ⟨10.1063/1.2928160⟩. ⟨insu-02928491⟩