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Searching for a mesh-independent sub-grid model for CFD simulation of gas-solid riser flows
Lu, Bona1,2; Wang, Wei1; Li, Jinghai1; Wang, W
2009-08-01
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume64Issue:15Pages:3437-3447
AbstractThis work aims to examine the effects of grid size in applying the two-fluid model (TFM), and thereby attempts to search for a mesh-independent sub-grid model for simulating gas-solid riser flows. To this end, we performed a series of TFM simulations over a periodic domain with various grid resolutions and drag closures. Of these drag models, EMMS/matrix model in its simplified version was chosen to be the focus of discussion. It was found that TFM simulation with a homogeneous drag model reaches its numerically asymptotic solution when the grid scale is as small as 10 times the particle diameter, but it still fails to capture the characteristic S-shaped axial voidage profile and highly over-predicts the solids flux. By comparison, EMMS/matrix model seems to reach a mesh-independent solution of the effect of sub-grid structures on the drag force, and predict successfully the axial voidage profile and the solids flux with even coarse grid. Therefore, the fine-grid TFM simulation is inadequate for gas-solid riser flows. We need sub-grid modeling of the heterogeneous structure. (C) 2009 Elsevier Ltd. All rights reserved.
KeywordSub-grid Structure Multiscale Momentum Transfer Multiphase Flow Simulation Fluidization
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ces.2009.04.024
Indexed BySCI
Language英语
WOS KeywordCIRCULATING FLUIDIZED-BED ; DISCRETIZED BOLTZMANN-EQUATION ; PARTICULATE SUSPENSIONS ; NUMERICAL SIMULATIONS ; HYDRODYNAMICS ; SPHERES
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000271298500005
Citation statistics
Cited Times:151[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6612
Collection多相复杂系统国家重点实验室
Corresponding AuthorWang, W
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Lu, Bona,Wang, Wei,Li, Jinghai,et al. Searching for a mesh-independent sub-grid model for CFD simulation of gas-solid riser flows[J]. CHEMICAL ENGINEERING SCIENCE,2009,64(15):3437-3447.
APA Lu, Bona,Wang, Wei,Li, Jinghai,&Wang, W.(2009).Searching for a mesh-independent sub-grid model for CFD simulation of gas-solid riser flows.CHEMICAL ENGINEERING SCIENCE,64(15),3437-3447.
MLA Lu, Bona,et al."Searching for a mesh-independent sub-grid model for CFD simulation of gas-solid riser flows".CHEMICAL ENGINEERING SCIENCE 64.15(2009):3437-3447.
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