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Numerical model for granular compaction under vertical tapping.

P Philippe1, D Bideau

  • 1GMCM, Bâtiment 11A, Campus de Beaulieu, Université de Rennes I, F-35042 Rennes, France.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|June 21, 2001
PubMed
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Vertical tapping of hard spheres compacts the packing, affecting larger pores more than smaller ones. This numerical model reveals density gradients and aging effects during compaction.

Area of Science:

  • Physics
  • Materials Science
  • Computational Modeling

Background:

  • Granular materials exhibit complex behaviors under external stimuli.
  • Understanding particle packing is crucial for various industrial processes.

Purpose of the Study:

  • To simulate the effects of vertical tapping on monodisperse hard sphere packings.
  • To analyze the local dynamics and structural changes during compaction.

Main Methods:

  • A simple numerical model was developed.
  • Simulations focused on vertical tapping dynamics.
  • Analysis included density profiles and pore size distributions.

Main Results:

  • Model results align with experimental data and previous simulations.

Related Experiment Videos

  • Compaction efficiency depends on excitation strength, with aging effects observed.
  • A vertical density gradient emerges during tapping.
  • Smaller pores (tetrahedral/octahedral sites) are less affected than larger pores.

    • Conclusions:

    • The numerical model accurately captures the dynamics of tapped granular systems.
    • Tapping preferentially affects larger pores, leading to structural rearrangement.
    • The model's local analysis capability provides detailed insights into compaction processes.