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Fine-grid two-fluid modeling of fluidization of Geldart A particles
Hong, Kun1,2; Chen, Sheng1,3; Wang, Wei1; Li, Jinghai1
2016-08-01
发表期刊POWDER TECHNOLOGY
ISSN0032-5910
卷号296期号:AUG页码:2-16
摘要A series of fine-grid simulation with two-fluid model (TFM) is performed for bubbling, turbulent and circulating fluidized beds (CFB) with Geldart A particles. The results show that the fine-grid TFM with homogeneous drag seems feasible for simulation of low-velocity, bubbling fluidized beds. However, the fidelity of fine-grid TFM declines with the increase of gas velocity. In particular, the solids flux predicted deviates much from the experimental data of CFB though the clustering phenomenon can be captured with refinement of grid. In contrast, the structure-dependent approach as exemplified by the energy-minimization multi-scale (EMMS)-based multi-fluid model gives better agreement with experimental data. This discrepancy raises the question of the applicability of the local equilibrium assumption underlying the TFM. It also sheds light to the necessity of meso-scale modeling and the critical role of solids flux to evaluate the simulation of CFB. (C) 2015 Elsevier B.V. All rights reserved.
关键词Meso-scale Emms Two-fluid Model Multi-scale Fluidization Multiphase Flow
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.powtec.2015.07.003
收录类别SCI
语种英语
关键词[WOS]SOLID RISER FLOWS ; MULTI-FLUID MODEL ; WALL BOUNDARY-CONDITION ; MASS-TRANSFER MODEL ; CFD SIMULATION ; KINETIC-THEORY ; PART II ; MESOSCALE STRUCTURES ; FILTERED MODEL ; SUBGRID MODEL
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者Ministry of Science and Technology(2012CB215003) ; National Natural Science Foundation of China(91334204 ; Chinese Academy of Sciences(XDA07080100) ; 21406081 ; 21176240)
WOS记录号WOS:000377739800002
引用统计
被引频次:13[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/122111/21154
专题多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Huaiyin Inst Technol, Coll Life Sci & Chem Engn, Huaian 223003, Peoples R China
3.China Univ Petr, State Key Lab Heavy Oil, Beijing 102249, Peoples R China
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Hong, Kun,Chen, Sheng,Wang, Wei,et al. Fine-grid two-fluid modeling of fluidization of Geldart A particles[J]. POWDER TECHNOLOGY,2016,296(AUG):2-16.
APA Hong, Kun,Chen, Sheng,Wang, Wei,&Li, Jinghai.(2016).Fine-grid two-fluid modeling of fluidization of Geldart A particles.POWDER TECHNOLOGY,296(AUG),2-16.
MLA Hong, Kun,et al."Fine-grid two-fluid modeling of fluidization of Geldart A particles".POWDER TECHNOLOGY 296.AUG(2016):2-16.
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