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Giant bubble pinch-off.

Raymond Bergmann1, Devaraj van der Meer, Mark Stijnman

  • 1Physics of Fluids Group and J.M. Burgers Centre for Fluid Dynamics, Department of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.

Physical Review Letters
|May 23, 2006
PubMed
Summary
This summary is machine-generated.

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The pinch-off of air bubbles in water is not strictly self-similar. Bubble collapse dynamics depend on the Froude number, revealing non-universal scaling laws for jet formation.

Area of Science:

  • Fluid dynamics
  • Non-linear physics

Background:

  • Self-similarity is a common model for drop pinch-off.
  • The inverse problem of bubble pinch-off requires further investigation.

Purpose of the Study:

  • To investigate the pinch-off dynamics of air bubbles in water.
  • To determine if bubble pinch-off adheres to self-similar scaling laws.

Main Methods:

  • High-speed imaging techniques.
  • Boundary integral simulations.

Main Results:

  • Bubble pinch-off is not strictly self-similar.
  • A second length scale (void curvature) influences collapse at finite Froude numbers.
  • Both neck radius and void curvature exhibit power-law scaling with time, dependent on the Froude number.

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Conclusions:

  • The pinch-off of air bubbles in water is a non-universal process.
  • Scaling laws are dependent on the Froude number, deviating from strict self-similarity.