A novel multi-scale large deformation approach for modelling of granular collapse

Hao Xiong, Zhen Yu Yin, François Nicot, Antoine Wautier, Miot Marie, Félix Darve, Guillaume Veylon, Pierre Philippe

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

Collapse of granular material is usually accompanied by long run-out granular flows in natural hazards, e.g. rock/debris flow and snow avalanches. This paper presents a novel multi-scale approach for modelling granular column collapse with large deformation. This approach employs the smoothed particle hydrodynamics (SPH) method to solve large deformation boundary value problems, while using a micromechanical model to derive the nonlinear material response required by the SPH method. After examining the effect of initial cell size, the proposed approach is subsequently applied to simulate the flow of granular column in a rectangular channel at a low water content by varying the initial aspect ratio. The numerical results show good agreement with various experimental observations on both collapse process and final deposit morphology. Furthermore, the meso-scale behaviour is also captured owing to the advantages of the micromechanical model. Finally, it was demonstrated that the novel multi-scale approach is helpful in improving the understanding of granular collapse and should be an effective computational tool for the analysis of real-scale granular flow.

Original languageEnglish
Pages (from-to)2371-2388
Number of pages18
JournalActa Geotechnica
Volume16
Issue number8
DOIs
Publication statusPublished - Aug 2021

Keywords

  • Granular collapse
  • Granular material
  • Meso-scale
  • Micromechanics
  • Multiscale approach
  • Smoothed particle hydrodynamics (SPH)

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

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