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
收藏
页码：144 / 152
页数：9
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