2024/07/11 by E. A. Kochurin, E. A. Kuznetsov, Kochurin, E. A. +1 · 1 citation
Engineering · #Aerodynamics and Acoustics in Jet Flows #Chaotic Dynamics (nlin.CD) #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Fluid Dynamics and Turbulent Flows #Geophysics (physics.geo-ph)
paper · pdf · doi:10.48550/arxiv.2407.08352
openalex publication_date 2024/07/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Direct numerical simulation of three-dimensional acoustic turbulence has been performed for both weak and strong regimes. Within the weak turbulence, we demonstrate the existence of the Zakharov-Sagdeev spectrum ∝ k-3/2 not only for weak dispersion but in the non-dispersion (ND) case as well. Such spectra in the k-space are accompanied by jets in the form of narrow cones. These distributions are realized due to small nonlinearity compared with both dispersion/diffraction. Increasing pumping in the ND case due to dominant nonlinear effects leads to the formation of shocks. As a result, the acoustic turbulence turns into an ensemble of random shocks with the Kadomtsev-Petviashvili spectrum.