2020/02/29 by Teng Man, Herbert E. Huppert, Ling Li +2
Engineering · Environmental Science · Physics and Astronomy · #Column (typography) #Deposition (geology) #Dimensionless quantity #Discrete element method #Flow (mathematics) #Geotechnical Engineering and Soil Mechanics #Granular flow and fluidized beds #Granular material #Inertial frame of reference #Landslides and related hazards #Particle (ecology) #cond-mat.soft
paper · pdf · doi:10.1007/s10035-021-01112-7
published as Granular Matter 23, 59 (2021)
openalex publication_date 2021/05/28 · arxiv created 2021/06/08 · arxiv updated 2021/06/09 · openalex created_date 2021/06/22 · openalex updated_date 2026/08/05
Granular column collapses result in an array of flow phenomena and deposition morphologies, the understanding of which brings insights into studying granular flows in both natural and engineering systems. Guided by experiments, we carried out computational studies with the discrete element method (DEM) to identify fundamental links between the macro-scale behavior and micro-scale properties of granular columns. A physics-based non-dimensional number combining particle and bulk properties of the column, α_\textrmeff, was found to determinate three collapse regimes (quasi-static, inertial, and liquid-like), revealing universal trends of flow regimes and deposition morphologies under different conditions. This non-dimensional number represents physically the competing inertial and frictional effects that govern the behavior of the granular column collapse, including energy conversion and dissipation. The finding is important for understanding quantitatively the flow of granular materials and their deposits.