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Related Experiment Videos

Resonance Behavior of Oscillating Bubbles.

Zholkovskij1, Kovalchuk, Fainerman

  • 1Institute of Biocolloid Chemistry, Ukrainian National Academy of Sciences, 42 Vernadsky Avenue, Kiev, 252680, Ukraine

Journal of Colloid and Interface Science
|March 10, 2000
PubMed
Summary

A new equation models bubble oscillations under pressure changes, considering surfactants. Surfactants can decrease resonance amplitudes, potentially preventing bubble detachment during oscillations.

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Area of Science:

  • Physical Chemistry
  • Fluid Dynamics
  • Chemical Engineering

Background:

  • Bubble dynamics are crucial in various industrial processes.
  • Understanding bubble behavior under oscillating pressure is essential for process optimization.
  • The influence of surfactants on bubble oscillation is not fully understood.

Purpose of the Study:

  • To derive a convolution-type equation describing bubble behavior under periodical pressure oscillations.
  • To analyze the influence of surfactants on bubble oscillation resonance.
  • To investigate conditions leading to bubble detachment.

Main Methods:

  • Derivation of a convolution-type equation for bubble dynamics.
  • Analysis of diffusion-controlled adsorption mechanisms.

Related Experiment Videos

  • Modeling of systems with and without surfactants.
  • Examination of small disturbances from equilibrium states.

    • Main Results:

    • The derived equation describes both established and transition regimes of bubble oscillation.
    • The presence of surfactants can lead to a depression of resonance amplitudes.
    • Sharp increases in bubble oscillation amplitude can cause detachment even at low harmonic pressures.

    Conclusions:

    • The developed model provides a comprehensive framework for analyzing surfactant effects on bubble resonance.
    • The findings offer insights into controlling bubble detachment in oscillating systems.
    • This work contributes to a better understanding of multiphase flow phenomena.