Discrete element simulation of particle flow in arbitrarily complex geometries
Su, JW (Su, Junwei)[1,4]; Gu, ZL (Gu, Zhaolin)[2,3]; Xu, XY (Xu, Xiaoyun)[4]
2011-12-01
发表期刊CHEMICAL ENGINEERING SCIENCE
卷号66期号:23页码:6069-6088
文章类型期刊论文
摘要

Conventional simulations of dense particle flows in complex geometries usually involve the use of glued particles to approximate geometric surface. This study is concerned with the development of a robust and accurate algorithm for detecting the interaction between a spherical particle and an arbitrarily complex geometric surface in the framework of soft-sphere discrete element model (DEM) without introducing any assumptions. Numerical experiments specially designed to validate the algorithm shows that the new algorithm can accurately predict the contact state of a particle with a complex geometric surface. Based on the proposed algorithm, a new solver for simulation of dense particle flows is developed and implemented into an open source computational fluid dynamics (CFD) software package OpenFOAM. The solver is firstly employed to simulate hydrodynamics in a bubble fluidized bed. Numerical results show that a 3D simulation can predict the bubble size better than a 2D simulation. Subsequently, gas-solid hydrodynamics in an immersed tube fluidized bed is simulated. Results show that bubble coalescence and breakup behavior around the immersed tubes are well captured by the numerical model. In addition, seven different particle flow patterns around the immersed tubes are identified based on the numerical results obtained.

关键词Discrete element method Unstructured mesh Particle flow OpenFOAM Fluidized bed Complex geometry
DOI10.1016/j.ces.2011.08.025
收录类别SCI
语种英语
引用统计
被引频次:29[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10336
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Gu, ZL (Gu, Zhaolin)[2,3]
作者单位1.School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
2.School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
3.SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, China;
4.Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
推荐引用方式
GB/T 7714
Su, JW ,Gu, ZL ,Xu, XY . Discrete element simulation of particle flow in arbitrarily complex geometries[J]. CHEMICAL ENGINEERING SCIENCE,2011,66(23):6069-6088.
APA Su, JW ,Gu, ZL ,&Xu, XY .(2011).Discrete element simulation of particle flow in arbitrarily complex geometries.CHEMICAL ENGINEERING SCIENCE,66(23),6069-6088.
MLA Su, JW ,et al."Discrete element simulation of particle flow in arbitrarily complex geometries".CHEMICAL ENGINEERING SCIENCE 66.23(2011):6069-6088.
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