An extension of hard-particle model for three-dimensional non-spherical particles: Mathematical formulation and validation

被引：14

作者：

Gui, Nan ^{[1
]}

Yang, Xingtuan ^{[1
]}

Tu, Jiyuan ^{[1
]}

Jiang, Shengyao ^{[1
]}

机构：

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

来源：

APPLIED MATHEMATICAL MODELLING | 2016年 / 40卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Multiphase flow; Particle/fluid flow; Granular media; Particle collision modeling; Non-spherical particle; DISCRETE ELEMENT SIMULATIONS; GRANULAR-MATERIALS; FLUIDIZED-BED; COLLISION; SPHERE; SHAPE; FLOW; DEM; SURFACE;

D O I：

10.1016/j.apm.2015.09.111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Particle collision model plays an important role in Eulerian-Lagrangian simulation of particle fluid flows. A new theoretical three-dimensional collision model for generalized non-spherical rigid particles is proposed by using an improved and generalized definition of the coefficient of restitution for general shape particles and following the fundamental laws of momentum, energy and friction. Moreover, the consistence between the present model and the existing hard sphere model under simplified conditions has been demonstrated by reducing the general solution to the special solution for spheres. This model is also validated by a numerical test of collision process between cubic particles using conservation laws and an experiment of collision between a brick particle and a flat surface. The validation work indicates the feasibility of this model to be used for general non-spherical particle-fluid flows. In addition, a particle discharging flow in a lifting hopper is simulated with satisfactory agreement with experimental results, which shows the successful demonstrative application of current model for complex particle flow simulation. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：2485 / 2499

页数：15

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