Viscoelastic bubbly media and ultrasonic shear-mode effects

2022/04/27 by Mike Forrester, Forrester, Michael, Pinfield, Valerie
Earth and Planetary Sciences · Environmental Science · Materials Science · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Methane Hydrates and Related Phenomena #Soft Condensed Matter (cond-mat.soft) #Ultrasound and Cavitation Phenomena #Underwater Acoustics Research

paper · pdf · doi:10.48550/arxiv.2204.12767

openalex publication_date 2022/04/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Here we show that in ultrasonic fields the phenomenon of reconversion of shear-modes into an effective compressional wave has a significant effect for bubbles in a medium viscosity liquid or weak gel. We present the consequent extra terms in the effective wavenumber and find the changes in sound velocity for different bubble radii. At high concentrations of bubbles the inclusion of shear-mode effects in the multiple-scattering model can help identify bubble sizes where additional resonance signatures emerge.

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