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Updated: May 14, 2026

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs
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Faraday instability at foam-water interface.

A Bronfort1, H Caps

  • 1GRASP, Physics Department B5, University of Liège, B-4000 Liège, Belgium. abronfort@ulg.ac.be

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 2, 2013
PubMed
Summary
This summary is machine-generated.

Vertical shaking of a Hele-shaw cell foam generates subharmonic surface waves above an acceleration threshold. Energy dissipation within the foam influences this threshold, leading to a new empirical model for foam dynamics.

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Area of Science:

  • Physics
  • Fluid Dynamics
  • Soft Matter

Background:

  • Foam dynamics are complex, involving interfaces and energy dissipation.
  • Surface wave generation in fluids is a well-studied phenomenon.
  • Hele-shaw cells are used to study 2D fluid phenomena.

Purpose of the Study:

  • To investigate the generation of surface waves in a shaken 2D foam.
  • To determine the acceleration threshold for wave appearance.
  • To model the energy dissipation within the foam and its effect on wave generation.

Main Methods:

  • Generating a nearly two-dimensional foam in a Hele-shaw cell.
  • Subjecting the foam to vertical shaking.
  • Analyzing the appearance and characteristics of surface waves at the foam-liquid interface.
  • Comparing experimental results to theoretical models for liquid-gas systems.

Main Results:

  • Subharmonic surface waves emerge at the foam-liquid interface above a specific acceleration threshold.
  • The acceleration threshold is influenced by energy dissipation within the foam.
  • An empirical model was developed to describe energy loss, considering bubble size and excitation velocity.

Conclusions:

  • Vertical shaking can induce subharmonic surface waves in 2D foams.
  • Foam's internal energy dissipation significantly impacts the wave generation threshold.
  • The proposed model provides insights into foam rheology and wave dynamics.