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Acoustic interaction between 3D-fabricated cubic bubbles.

Thomas Combriat¹, Philippine Rouby-Poizat¹, Alexander A Doinikov¹

¹CNRS/Université Grenoble-Alpes, LIPhy UMR 5588, Grenoble, F-38401, France. philippe.marmottant@univ-grenoble-alpes.fr.

|February 28, 2020

Summary

This summary is machine-generated.

Researchers created stable, acoustically oscillating cubic bubbles using 3D printing. These novel bubbles can be arranged in any configuration, enabling studies on bubble acoustics and collective resonance phenomena.

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Area of Science:

Acoustic Metamaterials
Fluid Dynamics
Microfabrication

Background:

Controlling bubble arrangements in fluids is challenging due to their instability and tendency to dissolve.
Acoustic properties of bubble clusters are of interest for various applications, but precise arrangement control is limited.

Purpose of the Study:

To develop a method for creating stable, spatially controllable bubble assemblies.
To investigate the acoustic coupling and collective resonance of arranged bubbles.
To establish a theoretical framework for predicting the acoustic behavior of bubble groups.

Main Methods:

Utilized stereolithographic printing to fabricate millimetric cubic frames.
Immersed frames in water to trap stable air bubbles within the cubic structures.
Experimentally arranged bubbles in linear, planar, and 3D configurations and measured their acoustic responses.

Main Results:

Successfully created long-lasting, acoustically oscillating cubic bubbles.
Demonstrated that arranged bubbles exhibit acoustic coupling, with collective resonance frequencies shifting lower, especially in 3D.
Validated that cubic bubbles acoustically mimic spherical bubbles of equivalent volume.

Conclusions:

Stereolithographic printing provides a robust method for fabricating stable, configurable bubble assemblies.
Bubble arrangement significantly influences collective acoustic behavior, offering potential for acoustic metamaterial design.
Developed a predictive theory for the acoustic emission of arbitrary bubble groups, aligning with experimental findings.