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Dynamic Multiscale Method for Gas-Solid Flow via Spatiotemporal Coupling of Two-Fluid Model and Discrete Particle Model
Chen, Xizhong; Wang, Junwu
2017-09-01
发表期刊AICHE JOURNAL
ISSN0001-1541
卷号63期号:9页码:3681-3691
摘要

Various computational fluid dynamics methods have been developed to study the hydrodynamics of gas-solid flows, however, none of those methods is suitable for all the problems encountered due to the inherent multiscale characteristics of gas-solid flows. Both discrete particle model (DPM) and two-fluid model (TFM) have been widely used to study gas-solid flows, DPM is accurate but computationally expensive, whereas TFM is computationally efficient but its deficiency is the lack of reliable constitutive relationships in many situations. Here, we propose a hybrid multiscale method (HMM) or dynamic multiscale method to make full use of the advantages of both DPM and TFM, which is an extension of our previous publication from rapid granular flow (Chen et al., Powder Technol. 2016; 304: 177-185) to gas-solid two-phase flow. TFM is used in the regions where it is valid and DPM is used in the regions where continuum description fails, they are coupled via dynamical exchange of parameters in the overlap regions. Simulations of gas-solid channel flow and fluidized bed demonstrate the feasibility of the proposed HMM. The Knudsen number distributions are also reported and analyzed to explain the differences. (C) 2017 American Institute of Chemical Engineers

关键词Two-fluid Model Discrete Particle Method Hybrid Model Spatial Coupling Dynamic Coupling Gas-solid Flow
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1002/aic.15723
收录类别SCI
语种英语
关键词[WOS]Rapid Granular Flows ; Fluidized-beds ; Particulate Systems ; Simulation
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(21422608)
WOS记录号WOS:000407192500007
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/23157
专题多相复杂系统国家重点实验室
作者单位Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
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Chen, Xizhong,Wang, Junwu. Dynamic Multiscale Method for Gas-Solid Flow via Spatiotemporal Coupling of Two-Fluid Model and Discrete Particle Model[J]. AICHE JOURNAL,2017,63(9):3681-3691.
APA Chen, Xizhong,&Wang, Junwu.(2017).Dynamic Multiscale Method for Gas-Solid Flow via Spatiotemporal Coupling of Two-Fluid Model and Discrete Particle Model.AICHE JOURNAL,63(9),3681-3691.
MLA Chen, Xizhong,et al."Dynamic Multiscale Method for Gas-Solid Flow via Spatiotemporal Coupling of Two-Fluid Model and Discrete Particle Model".AICHE JOURNAL 63.9(2017):3681-3691.
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