Anisotropic Spectra of Acoustic Turbulence

Abstract

We found universal anizopropic spectra of acoustic turbulence with the linear dispersion law \bbox{$\ddot{I}‰(k)=ck$} within the framework of generalized kinetic equation which takes into account the finite time of three-wave interactions. This anisotropic spectra can assume both scale-invariant and non scale-invariant form. The implications for the evolution of the acoustic turbulence with non-isotropic pumping are discussed. The main result of the article is that the spectra of acoustic turbulence tend to become more isotropic.

10 pages 2 figures, tar.gz