Related Experiment Video
Updated: Jun 8, 2026
10:21
Evanescent Field Based Photoacoustics: Optical Property Evaluation at Surfaces
Published on: July 26, 2016
Investigating acoustic-induced deformations in a foam using multiple light scattering
M Erpelding1, R M Guillermic, B Dollet
1Institut de Physique de Rennes, UMR CNRS, Université de Rennes, France.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|September 28, 2010
Summary
External acoustic waves cause bubbles in aqueous foam to displace, creating localized shear near walls. This research offers new insights into foam acoustics and sound transmission.
Area of Science:
- Physics
- Materials Science
- Acoustics
Background:
- Aqueous foams are complex fluids with unique acoustic properties.
- Understanding bubble dynamics is crucial for predicting sound transmission through foams.
Purpose of the Study:
- To investigate the effect of external acoustic waves on bubble displacements in aqueous foam.
- To elucidate the acoustic displacement profile within the foam.
- To gain insights into foam acoustics and high-frequency deformation.
Main Methods:
- Utilized multiple light scattering techniques to detect acoustic-induced bubble displacements.
- Measured bubble displacements at various sound frequencies and amplitudes.
- Compared experimental data with analytical predictions and numerical simulations.
Main Results:
- Detected acoustic-induced bubble displacements as modulations on the photon correlation curve.
- Revealed a nontrivial acoustic displacement profile, including localized shear near solid walls.
- Attributed the localized shear to inertial contributions of the acoustic wave.
Conclusions:
- Acoustic waves induce specific bubble movements and localized shear within aqueous foams.
- Findings enhance understanding of sound transmission, high-frequency foam deformation, and light scattering analysis in non-uniformly deforming media.
