Acoustic Rayleigh Wave Turbulence in Soft Viscoelastic Matter.

ABSTRACT: Evidence of discrete acoustic Rayleigh wave turbulence (DARWT) is reported on the free surface of complex viscoelastic materials under monochromatic excitation. These surface elastic non-linear Rayleigh waves exhibit dispersionless dynamics governed by bulk shear rigidity at coexistence with dispersive capillary waves supported by surface tension. Using Laser Doppler Vibrometry (LDV), the discrete Kolmogorov-Zakharov (KZ) spectrum is measured, characterized by a power-law envelope in an inertial cascade of discrete harmonics. When shear rigidity dominates, KZ-spectrum characterized by an ω^-5/2 acoustic fingerprint is observed as a conservative solid-like scaling, theoretically predicted from the exact three-wave dispersionless resonance. Conversely, when surface tension dominate

SUBMITTER: Kharbedia M 

PROVIDER: S-EPMC12005792 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature