Numerical Analysis of Granular Flows in a Silo Bed on Flow Regime Characterization

被引：6

作者：

Yang, Xingtuan ^{[1
,2
]}

Gui, Nan ^{[1
,2
,3
]}

Tu, Jiyuan ^{[1
,2
,4
]}

Jiang, Shengyao ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China

[2] Minist Educ, Key Lab Adv Reactor Engn & Safety, Beijing 100084, Peoples R China

[3] China Univ Petr, Coll Mech & Transportat Engn, Beijing, Peoples R China

[4] RMIT Univ, Sch Aerosp Mech & Mfg Engn, Melbourne, Vic 3083, Australia

来源：

PLOS ONE | 2015年 / 10卷 / 03期

关键词：

DISCRETE; AVALANCHES; NETWORKS; POWDERS; REACTOR; MODEL;

D O I：

10.1371/journal.pone.0119155

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The flow characteristics of a gravity-driven dense granular flow in a granular bed with a contracted drainage orifice are studied by using discrete element method and quantitative analysis. Three values of discharging rates, ranging from fast to slow dense flows, are investigated. Time variations and derivatives of mean forces and velocities, as well as their respective correlations, are analyzed to quantitatively depict the characteristics of granular flow as well as flow regime categorization. The auto-correlation functions, as well as their Fourier spectrums, are utilized to characterize the differences between the mechanisms of slow and fast granular flows. Finally, it is suggested that the flow regimes of slow and fast flows can be characterized by the kinetic and kinematic flow properties of particles.

引用

页数：14

共 25 条

[1] Avalanching flow of cohesive powders [J].