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Related Experiment Videos

Liquid-induced transitions in granular media.

P Tegzes1, R Albert, M Paskvan

  • 1Physics Department, 225 Nieuwland Science, University of Notre Dame, Notre Dame, Indiana 46556, USA.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|April 24, 2002
PubMed
Summary

Adding liquid to granular media changes its flow properties. Three distinct flow regimes emerge as liquid content increases, impacting material behavior and adhesion.

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Area of Science:

  • Physics
  • Materials Science
  • Fluid Dynamics

Background:

  • Granular media exhibit complex behaviors influenced by inter-particle forces.
  • The role of interstitial liquid in modifying granular material properties is not fully understood.
  • Adhesive forces from liquid bridges significantly alter granular flow.

Purpose of the Study:

  • To investigate the impact of interstitial liquid content on the physical properties of granular media.
  • To identify and characterize distinct flow regimes as a function of liquid content.
  • To evaluate existing theories explaining liquid-mediated granular behavior.

Main Methods:

  • Measurement of the angle of repose for granular media at varying liquid contents.
  • Observation and analysis of grain movement patterns.

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  • Comparison of experimental results with theoretical models.

    • Main Results:

    • Three distinct flow regimes were identified: granular, correlated, and plastic.
    • The angle of repose changes predictably with increasing liquid content, reflecting altered inter-particle forces.
    • Regime transitions are driven by the interplay between liquid content and adhesive forces.

    Conclusions:

    • Interstitial liquid fundamentally alters granular media flow properties.
    • The observed regimes provide a framework for understanding liquid effects on granular materials.
    • Further theoretical development is needed to fully capture the complex liquid-grain interactions.