2022/12/01 by E. A. Kochurin, E. A. Kuznetsov, Е. А. Кузнецов · 1 citation
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #Computational physics #Computer simulation #Direct numerical simulation #Dispersion (optics) #Distribution (mathematics) #Exponent #Ionosphere and magnetosphere dynamics #Isotropy #Mathematical analysis #Mathematics #Mechanics #Meteorological Phenomena and Simulations #Optics #Physics #Power law #Quantum mechanics #Reynolds number #Seismic Waves and Analysis #Spectral density #Spectrum (functional analysis) #Statistical physics #Turbulence #Wavelength #Wavenumber
paper · pdf · doi:10.1134/s0021364022602494
openalex publication_date 2022/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/16
We present the results of direct numerical simulation of three-dimensional acoustic turbulence in medium with weak positive dispersion. It is shown that at the beginning of the long-wavelength region in the turbulence energy distribution in the k -space, there are formed jets in the form of narrow cones. At higher wavenumbers, the cones broaden, and the distribution accordingly tends to isotropic. In this region of wavenumbers, the angle-averaged turbulence spectrum acquires a power-law character, E(k) ∝ k^ - α , with the exponent close to 3/2, which corresponds to the Zakharov–Sagdeev weak acoustic turbulence spectrum.