articleJournal of Geophysical Research Earth SurfaceMar 1, 2026Closed access

Propagation Scaling and Micromechanics of Buoyant Granular Column Collapses

TMTeng ManZWZhongrong WangHHHerbert HuppertSRSongkai RenSASergio A. Galindo‐Torres

Westlake University · Zhejiang University of Technology · +5 more institutions

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Abstract

Abstract Granular avalanches exhibit striking parallels to natural geophysical flows, including debris flows, landslides, and pyroclastic flows, whose instability, rheology, and deposition morphology are governed by particle‐scale dynamics and bulk interactions within granular systems. To rigorously investigate fluid‐particle coupling in such multiphase environments, this study employs coupled lattice Boltzmann‐discrete element method simulations, which are validated by our experimental observations, to analyze the collapse of buoyant granular columns in subaqueous settings. The insights gained are extended to elucidate the behavior of large‐scale geophysical flows, such as submarine gravity currents. In…

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Topics & keywords

Topics
Keywords
  • Granular material
  • Microscale chemistry
  • Scaling
  • Buoyancy
  • Micromechanics
  • Multiphase flow
  • Discrete element method
  • Neutral buoyancy
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