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An Approach for Drag Correction Based on the Local Heterogeneity for Gas-Solid Flows
Li, Tingwen1,2; Wang, Limin3; Rogers, William1; Zhou, Guofeng3; Ge, Wei3
Source PublicationAICHE JOURNAL

The drag models typically used for gas-solids interaction are mainly developed based on homogeneous systems of flow passing fixed particle assembly. It has been shown that the heterogeneous structures, i.e., clusters and bubbles in fluidized beds, need to be resolved to account for their effect in the numerical simulations. Since the heterogeneity is essentially captured through the local concentration gradient in the computational cells, this study proposes a simple approach to account for the non-uniformity of solids spatial distribution inside a computational cell and its effect on the interaction between gas and solid phases. To validate this approach, the predicted drag coefficient has been compared to the results from direct numerical simulations. In addition, the need to account for this type of heterogeneity is discussed for a periodic riser flow simulation with highly resolved numerical grids and the impact of the proposed correction for drag is demonstrated. (C) 2016 American Institute of Chemical Engineers AIChE J, 63: 1203-1212, 2017

KeywordComputational Fluid Dynamics Gas-solid Flow Drag Model Direct Numerical Simulation Heterogeneous Structure Sub-grid Model
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordDirect Numerical-simulation ; Structure-dependent Drag ; Fluidized-beds ; Cfd Simulation ; Model ; Systems ; Spheres
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Energy Technology Laboratory's under RES(DE-FE0004000) ; National Natural Science Foundation of China(91434113) ; National Program on Key Basic Research Project(2015CB251402) ; Chinese Academy of Sciences(QYZDB-SSW-SYS029)
WOS IDWOS:000398048500003
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.US DOE, Natl Energy Technol Lab, Morgantown, WV 26505 USA
2.AECOM, Morgantown, WV 26505 USA
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Tingwen,Wang, Limin,Rogers, William,et al. An Approach for Drag Correction Based on the Local Heterogeneity for Gas-Solid Flows[J]. AICHE JOURNAL,2017,63(4):1203-1212.
APA Li, Tingwen,Wang, Limin,Rogers, William,Zhou, Guofeng,&Ge, Wei.(2017).An Approach for Drag Correction Based on the Local Heterogeneity for Gas-Solid Flows.AICHE JOURNAL,63(4),1203-1212.
MLA Li, Tingwen,et al."An Approach for Drag Correction Based on the Local Heterogeneity for Gas-Solid Flows".AICHE JOURNAL 63.4(2017):1203-1212.
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