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Dissipative flows of 2D foams.

I Cantat1, R Delannay

  • 1Campus de Beaulieu, Bât. 11A, GMCM, Université de Rennes (CNRS), CS 74205 263, av. du Général Leclerc,, 35042, Rennes Cedex, France. isabelle.cantat@univ-rennes1.fr

The European Physical Journal. E, Soft Matter
|October 7, 2005
PubMed
Summary

We studied 2D liquid foam flow with a large bubble. At high flow rates, the large bubble moves faster than the foam, a phenomenon crucial for understanding foam dynamics.

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Area of Science:

  • Fluid dynamics
  • Materials science
  • Soft matter physics

Background:

  • Analyzing 2D liquid foam flow is crucial for understanding complex fluid behavior.
  • The presence of a large bubble significantly alters foam flow dynamics.

Purpose of the Study:

  • To model and simulate the flow of 2D foams containing a single large bubble.
  • To characterize the migration velocity of the large bubble relative to the mean flow.

Main Methods:

  • Developed a numerical model for simulating 2D foam flows.
  • Employed scaling arguments and continuum medium approximations for analytical predictions.
  • Validated numerical and analytical results against experimental data.

Main Results:

  • Identified two distinct flow regimes: plug flow at low flux and faster large bubble migration at high flux.
  • Quantified the relative velocity of the large bubble, showing good agreement between numerical, analytical, and experimental findings.
  • Demonstrated that a single large bubble can destabilize 2D foam flow.

Conclusions:

  • The study provides a comprehensive model for 2D foam flow with a large bubble.
  • The findings offer insights into the behavior of polydisperse foams and their flow instabilities.
  • The research bridges the gap between theoretical predictions and experimental observations in foam dynamics.

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