Related Experiment Video
Updated: Dec 31, 2025
08:19
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
2.6K
Acoustics of Cubic Bubbles: Six Coupled Oscillators
Maxime Harazi1, Matthieu Rupin1, Olivier Stephan1
1Univ. Grenoble Alpes, CNRS, LIPhy, F-38000 Grenoble, France.
Physical Review Letters
|January 11, 2020
Summary
We developed stable cubic bubbles using 3D printed frames, outperforming spherical bubbles. These novel cubic bubbles act as coupled harmonic oscillators and efficient acoustic emitters.
Area of Science:
- Fluid dynamics
- Acoustics
- Materials science
Background:
- Spherical bubbles are common but less stable.
- Understanding bubble dynamics is crucial for various applications.
Purpose of the Study:
- Introduce and characterize stable cubic bubbles.
- Investigate their acoustic properties and compare them to spherical bubbles.
Main Methods:
- 3D printing of millimetric frames to stabilize cubic bubbles in water.
- Experimental observation of bubble oscillations.
- Analytical modeling and 3D numerical simulations of bubble dynamics.
- Acoustic measurements of emission properties.
Main Results:
- Cubic bubbles exhibit enhanced stability over time and space compared to spherical bubbles.
- Bubble faces behave as coupled harmonic oscillators.
- Analytical and numerical models accurately predict resonance phenomena.
- Cubic bubbles function as effective subwavelength monopole acoustic emitters with suppressed secondary modes.
Conclusions:
- Cubic bubbles offer superior stability and unique acoustic properties.
- The coupled harmonic oscillator model explains their dynamic behavior.
- These findings open new avenues for acoustic applications and bubble research.
Related Concept Videos
01:28Standing Waves in a Cavity
1.4K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.4K
01:30Oscillations In An LC Circuit
2.9K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
2.9K
01:07Damped Oscillations
6.7K
In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
Although friction and other non-conservative...
Although friction and other non-conservative...
6.7K
01:14Sound Waves: Resonance
3.1K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
3.1K
01:06Forced Oscillations
7.5K
When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
7.5K
01:04Oscillations about an Equilibrium Position
6.5K
Stability is an important concept in oscillation. If an equilibrium point is stable, a slight disturbance of an object that is initially at the stable equilibrium point will cause the object to oscillate around that point. For an unstable equilibrium point, if the object is disturbed slightly, it will not return to the equilibrium point. There are three conditions for equilibrium points—stable, unstable, and half-stable. A half-stable equilibrium point is also unstable, but is named so...
6.5K