IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
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
Source PublicationCHEMICAL ENGINEERING SCIENCE
Volume66Issue:23Pages:6069-6088
Subtype期刊论文
Abstract

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.

KeywordDiscrete element method Unstructured mesh Particle flow OpenFOAM Fluidized bed Complex geometry
DOI10.1016/j.ces.2011.08.025
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10336
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorGu, ZL (Gu, Zhaolin)[2,3]
Affiliation1.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
Recommended Citation
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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