Discrete element method modeling of corn-shaped particle flow in rectangular hopper  

作　　者：He TAO Baosheng JIN Wenqi ZHONG Xiaofang WANG 

机构地区：[1]School of Energy&Environment,Southeast University,Nanjing 210096,China

出　　处：《Frontiers of Structural and Civil Engineering》2010年第2期267-275,共9页结构与土木工程前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.50706007 and 50976025);National Key Program of Basic Research in China(No.2010CB732206);the Foundation of Excellent Young Scholar of Southeast University(4003001039).

摘　　要：Discrete element method(DEM)was developed to simulate the corn-shaped particles flow in the hopper.The corn-shaped particle was described by four overlapping spheres.Contact force and gravity force were considered when establishing the model.In addition,flowing characteristic of particles in the hopper was studied.The effect of friction coefficient on the wall pressure,voidage and velocity distribution was analyzed.The results show that the discharge rate decreases with the friction coefficient increasing;and the"over-pressure"phenomenon occurs in the discharging process for two different friction coefficients.The voidage also increases as the friction coefficient increasing.And the velocity distribution is more uniformity and is closer to the mass flow with the friction coefficient deceasing.

关 键 词：discrete element method(DEM) nonspherical VOIDAGE pressure velocity distribution HOPPER 

分 类 号：TG1[金属学及工艺—金属学]