Fine-grid two-fluid modeling of fluidization of Geldart A particles

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	Fine-grid two-fluid modeling of fluidization of Geldart A particles
	Hong, Kun 1,2; Chen, Sheng 1,3; Wang, Wei 1; Li, Jinghai 1
刊名	POWDER TECHNOLOGY
	2016-08-01
卷号	296 期号:AUG 页码:2-16
关键词	Meso-scale EMMS Two-fluid model Multi-scale Fluidization Multiphase flow
ISSN号	0032-5910
英文摘要	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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000377739800002
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/21154]
专题	过程工程研究所_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
推荐引用方式 GB/T 7714	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.