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Updated: May 24, 2026

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

Segregation in water-based stable single-bubble sonoluminescence.

Mogens T Levinsen¹

¹BioComplexity Lab, Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark. levinsen@nbi.dk

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|March 10, 2012

Summary

This summary is machine-generated.

Investigating single-bubble sonoluminescence, this study found that gas mixtures in bubbles highly thermalize radiation, even without species segregation. This challenges previous theories about shock waves influencing sonoluminescence spectra.

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Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

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Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

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Published on: May 9, 2021

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

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Published on: April 11, 2014

Area of Science:

Acoustics
Plasma Physics
Spectroscopy

Background:

Single-bubble sonoluminescence (SBSL) spectra closely resemble blackbody radiation, posing a long-standing question about the underlying physics.
The transparency of bubbles to their own radiation and the potential role of shock waves or compression waves have been debated.

Purpose of the Study:

To investigate the mechanism behind the thermalized spectra in single-bubble sonoluminescence.
To determine if species segregation within the bubble, indicative of shock waves, correlates with spectral characteristics.

Main Methods:

Experimental investigation of sonoluminescence spectra from bubbles seeded with gas mixtures (He/Ne with Xe/Ar).
Application of a specific spectral transformation for single-parameter characterization tailored to the experimental setup.

Main Results:

No evidence of species segregation was detected in the gas mixtures within the bubbles.
Despite the absence of segregation, the emitted radiation consistently exhibited highly thermalized characteristics across all tested gas mixtures.

Conclusions:

The findings suggest that species segregation is not a prerequisite for the observed thermalized radiation in single-bubble sonoluminescence.
The high degree of thermalization in SBSL spectra may arise from mechanisms other than shock-induced species segregation.