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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
Source PublicationAICHE JOURNAL
ISSN0001-1541
Volume63Issue:9Pages:3681-3691
Abstract

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

KeywordTwo-fluid Model Discrete Particle Method Hybrid Model Spatial Coupling Dynamic Coupling Gas-solid Flow
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1002/aic.15723
Indexed BySCI
Language英语
WOS KeywordRapid Granular Flows ; Fluidized-beds ; Particulate Systems ; Simulation
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(21422608)
WOS IDWOS:000407192500007
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23157
Collection多相复杂系统国家重点实验室
AffiliationChinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
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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