Related Experiment Video
Updated: Aug 18, 2025
08:19
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
2.3K
Sloshing Resonance of an Acoustically Levitated Air-in-Liquid Compound Drop
Zilong Fang1, Mohammad E Taslim1, Kai-Tak Wan1
1Mechanical and Industrial Engineering Department, Northeastern University, Boston, Massachusetts02115, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|December 9, 2022
Summary
Acoustically levitated compound drops were induced into resonance, revealing interface dynamics conforming to the Saffren model. Resonance behavior depends on drop size and modes, with asymmetric multi-bubble drops showing desynchronized resonance.
Area of Science:
- Fluid dynamics
- Acoustic levitation
- Resonance phenomena
Background:
- Acoustic levitation enables contactless manipulation of fluids.
- Understanding compound drop dynamics is crucial for various applications.
Purpose of the Study:
- To investigate the azimuthal sloshing resonance of acoustically levitated air-in-liquid compound drops.
- To analyze the influence of resonance modes and drop dimensions on interface waveforms and spectral characteristics.
Main Methods:
- Utilizing acoustic levitation to suspend air-in-liquid compound drops.
- Applying modulated frequency to induce out-of-phase azimuthal sloshing resonance (modes n = 4-9).
- Analyzing inner and outer liquid-air interface waveforms and frequency spectrum.
Main Results:
- Observed that interface waveforms conform to the classical Saffren model.
- Resonance peaks and harmonics are dependent on drop dimensions and resonance modes.
- Asymmetric drops with multiple air bubbles exhibit desynchronized resonance.
Conclusions:
- The study elucidates the resonance behavior of acoustically levitated compound drops.
- Findings have significant implications for the dynamics of core-shell structures in fluid systems.
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