DENSE GRANULAR FREE-SURFACE FLOWS: COMPARISON BETWEEN <i>μ</i>(<i>I</i>)-RHEOLOGY AND DEM SIMULATION

• JIANG Xiaoyu

  Graduate school of Engineering, Information and Systems, University of Tsukuba

• MATSUSHIMA Takashi

  Division of Engineering Mechanics and Energy, University of Tsukuba

抄録

We have performed a systematic simulation study of dry, granular, gravity-driven, free-surface steady flow in two-dimension, investigating the rheology of cohesionless granular particles in rough inclined plane geometries by discrete element method (DEM). DEM simulation results are compared to a widely accepted μ(I)-rheology model. Microscopic parameters such as coefficient of inter-granular friction and particle size distribution are changed to investigate the influence on macroscopic behaviors like velocity field, volume fraction and effective bulk friction qualitatively. It turned out that more polydisperse system and more frictional particles leads to a low volume fraction and high effective friction. Influence of the inter-granular friction becomes stronger when it is smaller than 1 and becomes weak rapidly when it increases continuously.

収録刊行物

• 土木学会論文集Ａ２（応用力学）

  土木学会論文集Ａ２（応用力学） 74 (2), I_393-I_402, 2018

  公益社団法人 土木学会

キーワード

• granular flow
• free-surface flow
• gravity-driven flow
• <i>μ</i>(<i>I</i>)-rheology
• DEM

詳細情報

• CRID: 1390564238075025664
• NII論文ID: 130007584867
• DOI: 10.2208/jscejam.74.i_393
• ISSN: 21854661
• Web Site: https://www.jstage.jst.go.jp/article/jscejam/74/2/74_I_393/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可