Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Preavalanche instabilities in a granular pile.

Lydie Staron1, Jean-Pierre Vilotte, Farhang Radjai

  • 1IPGP, 4 Place Jussieu, F-75252 Paris cedex 05, France.

Physical Review Letters
|November 22, 2002
PubMed
Summary

Researchers numerically studied granular material flow, finding that "fluidized" clusters grow as the system nears instability. This reveals insights into static-to-dynamic transitions in granular dynamics.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Exploring the gravity-driven failure of a cohesive granular column.

Physical review. E·2025
Same author

Particle fracture regimes from impact simulations.

Physical review. E·2024
Same author

Dynamic compaction of cohesive granular materials: scaling behavior and bonding structures.

Soft matter·2024
Same author

Contact networks and force transmission in aggregates of hexapod-shaped particles.

Soft matter·2024
Same author

How cohesion controls the roughness of a granular deposit.

Soft matter·2021
Same author

Evolution of granular materials under isochoric cyclic simple shearing.

Physical review. E·2021

Area of Science:

  • Physics
  • Geophysics
  • Materials Science

Background:

  • Granular materials exhibit complex behaviors, transitioning between static and dynamic states.
  • Understanding these transitions is crucial for various applications, from civil engineering to planetary science.

Purpose of the Study:

  • To numerically investigate the transition from static equilibrium to dynamic surface flow in a 2D cohesionless granular system.
  • To characterize this transition using an order parameter related to critical contacts and analyze spatial correlations.

Main Methods:

  • Numerical simulations of a 2D cohesionless granular system under continuous gravity loading.
  • Definition and analysis of an order parameter: the density of critical contacts (fully mobilized friction).
  • Spatial correlation analysis of critical contacts to identify and characterize 'fluidized' clusters.

Main Results:

  • The static-to-dynamic transition is marked by intermittent local dynamic rearrangements.
  • A 'fluidized' cluster phenomenon was observed, with cluster size showing power-law divergence near the stability limit.
  • The observed behavior is consistent with multiphase system models for granular transitions.

Conclusions:

  • The study provides a quantitative description of the static-to-dynamic transition in granular materials.
  • The findings support the view of granular systems as multiphase systems during transitions.
  • Numerical analysis reveals critical phenomena associated with the onset of dynamic flow.

Related Experiment Videos