Numerical study of gravity-driven dense granular flows on flow behavior characterization

被引：12

作者：

Li, Yu ^{[1
,2
]}

Gui, Nan ^{[1
]}

Yang, Xingtuan ^{[1
]}

Tu, Jiyuan ^{[1
,2
]}

Jiang, Shengyao ^{[1
]}

机构：

[1] Tsinghua Univ, Key Lab Adv Reactor Engn & Safety, Collaborat Innovat Ctr Adv Nucl Energy Technol, Minist Educ,Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China

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

来源：

POWDER TECHNOLOGY | 2016年 / 297卷

基金：

中国国家自然科学基金;

关键词：

Dense granular flow; Gravity-driven; Flow regime; Statistical criterion; Discrete element method; High temperature gas-cooled reactor; PREDICTING DISCHARGE DYNAMICS; COHESIVE PARTICLES; PEBBLE FLOW; LOW-SPEED; SILO; SIMULATIONS; DESIGN; MODELS; HTR;

D O I：

10.1016/j.powtec.2016.04.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A wide range of gravity-driven dense granular flows are studied numerically by using the discrete element method and statistical analysis. Intermittency and avalanche phenomenon of slow granular flows are illustrated clearly. Through analyzing time-energy data of flows with different velocities, the transformation of flow behavior from quasi-static to kinetic regimes is observed. More importantly, a general statistical rule on time-energy distribution of dense granular system under gravity is suggested. Based on this rule, the gravity-driven dense granular flows can be characterized quantitatively and categorized into three sub-regimes according to their primary features. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：144 / 152

页数：9

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