Related Experiment Video
Updated: Mar 3, 2026
08:19
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
2.8K
On-off intermittency in coupled chaotic thermoacoustic oscillations
Rémi Delage1, Yusuke Takayama1, Tetsushi Biwa1
1Department of Mechanical Engineering, Tohoku University, Sendai 980-8579, Japan.
Chaos (Woodbury, N.Y.)
|May 1, 2017
Summary
Coupled thermoacoustic oscillators exhibit on-off intermittency. Synchronization breaks down with smaller orifices, satisfying statistical scaling laws during laminar phases.
Area of Science:
- Nonlinear Dynamics
- Acoustics
- Fluid Dynamics
Background:
- Thermoacoustic oscillations can exhibit complex chaotic behavior.
- Mode competition drives chaotic dynamics through quasiperiodic routes.
- Coupling oscillators can lead to synchronized states.
Purpose of the Study:
- Document on-off intermittency in coupled thermoacoustic chaotic oscillations.
- Investigate the breakdown of complete synchronization.
- Analyze the statistical properties during intermittent behavior.
Main Methods:
- Experimental setup with coupled thermoacoustic chaotic oscillators.
- Utilizing a rigid plate with an orifice to connect oscillators.
- Analysis of pressure fluctuations to study synchronization and intermittency.
Main Results:
- Observed on-off intermittency in coupled thermoacoustic chaotic oscillations.
- Complete synchronization achieved via a rigid plate with an orifice.
- Statistical scaling laws (laminar phases, spectral density, amplitude distribution) satisfied during synchronization breakdown.
Conclusions:
- On-off intermittency is a key route for synchronization breakdown in these systems.
- Orifice size critically influences the transition to intermittency.
- The observed behavior aligns with theoretical statistical scaling laws.
Related Concept Videos
01:07Damped Oscillations
7.4K
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...
7.4K
01:06Forced Oscillations
8.1K
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.
8.1K
01:30Oscillations In An LC Circuit
3.2K
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
3.2K
01:04Oscillations about an Equilibrium Position
7.1K
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...
7.1K
01:20Types of Damping
7.9K
If the amount of damping in a system is gradually increased, the period and frequency start to become affected because damping opposes, and hence slows, the back and forth motion (the net force is smaller in both directions). If there is a very large amount of damping, the system does not even oscillate; instead, it slowly moves toward equilibrium. In brief, an overdamped system moves slowly towards equilibrium, whereas an underdamped system moves quickly to equilibrium but will oscillate about...
7.9K
01:19Limits with Oscillating Discontinuities
554
An oscillating discontinuity is a type of discontinuity in which a function’s values fluctuate infinitely often as the input approaches a particular point. Unlike jump discontinuities, where the function suddenly shifts between two values, or infinite discontinuities, where the function diverges without bound, an oscillating discontinuity arises from rapid back-and-forth variation. Because the function never stabilizes toward a single value, no finite limit exists at that point.One of the...
554