Numerical investigation of reverse segregation in debris flows by DEM

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Numerical investigation of reverse segregation in debris flows by DEM
	Zhou GD(周公旦)
刊名	Granular Matter
	2010-09-11
卷号	5 期号:12 页码:507-516
关键词	Discrete element method Dry granular flow Reverse segregation Flow regime
通讯作者	周公旦
英文摘要	Studies of the mechanisms and the effects on the flowing mobility for hazardous geophysical flows (e.g., debris flows) is crucial for hazard mitigation and prediction. Granular flows with grains of mixed sizes are numerically modeled and the contact behavior of solid particles is fundamentally studied using the discrete element method. The mechanical effects of particle contacts (shearing and collision) are contrasted with geometrical effects (kinetic sieving) to explain the mechanism of reverse segregation. Compared to granular flows with uniform solid particles, the effect of segregation on granular flowing mobility is investigated. It is found that reverse segregation can significantly influence the flowing mobility and the flowing regimes in the front head of the granular body. A mechanical explanation of the segregation mechanism can be presented by a new dimensionless number, which is correlated with the contact force.
学科主题	自然地理学 ; 工程力学 ; 计算机应用
分类号	TB3
收录类别	SCI
语种	英语
公开日期	2012-12-10
内容类型	期刊论文
源URL	[http://192.168.143.20:8080/handle/131551/4406]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式 GB/T 7714	Zhou GD. Numerical investigation of reverse segregation in debris flows by DEM[J]. Granular Matter,2010,5(12):507-516.
APA	Zhou GD.(2010).Numerical investigation of reverse segregation in debris flows by DEM.Granular Matter,5(12),507-516.
MLA	Zhou GD."Numerical investigation of reverse segregation in debris flows by DEM".Granular Matter 5.12(2010):507-516.