A steady-state EMMS drag model for fluidized beds
Tian, Yujie; Lu, Bona; Li, Fei; Wang, Wei1

Mesoscale structures exist inherently in fluidized beds and hence should be taken into account in the constitutive modeling of the drag force. To account for mesoscale effects, previous efforts have been paid on extending the steady-state Energy-Minimization Multi-Scale (EMMS) model to the sub-grid level by introducing acceleration terms into the force balance equations. The EMMS drag models thereof were normally confined into specific flow regimes. In this work, the definition of the heterogeneity index was refined by incorporating the steady-state force balance between the drag and buoyed weight. A simple derivation thereof agrees well with the filtered drag model. Based on such analysis, we proposed a new drag model by solving the steady-state EMMS equations. As a preliminary validation, this new drag was found to allow successful CFD simulation of flow behavior of fluidized beds covering a broad range of flow regimes. (C) 2020 Elsevier Ltd. All rights reserved.

KeywordFluidization Drag Meso-scale Structures Multiphase Flow Simulation
WOS KeywordGas-solid Flows ; Averaged 2-fluid Model ; Cfd Simulation ; Particle Flows ; Multiscale Cfd ; Constitutive Models ; Validation ; Cluster ; Arrays ; Mesoscales
Funding ProjectNational Natural Science Foundation of China[21625605] ; National Natural Science Foundation of China[21821005] ; National Natural Science Foundation of China[91834302]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China
WOS IDWOS:000530711700011
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Document Type期刊论文
Corresponding AuthorWang, Wei
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Tian, Yujie,Lu, Bona,Li, Fei,et al. A steady-state EMMS drag model for fluidized beds[J]. CHEMICAL ENGINEERING SCIENCE,2020,219:14.
APA Tian, Yujie,Lu, Bona,Li, Fei,&Wang, Wei.(2020).A steady-state EMMS drag model for fluidized beds.CHEMICAL ENGINEERING SCIENCE,219,14.
MLA Tian, Yujie,et al."A steady-state EMMS drag model for fluidized beds".CHEMICAL ENGINEERING SCIENCE 219(2020):14.
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