Steady-state modeling of axial heterogeneity in CFB risers based on one-dimensional EMMS model

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	Steady-state modeling of axial heterogeneity in CFB risers based on one-dimensional EMMS model
	Hu, Shanwei; Liu, Xinhua; Li, Jinghai
刊名	CHEMICAL ENGINEERING SCIENCE
	2013-06-07
卷号	96 期号:0 页码:165-173
关键词	Mathematical modeling Hydrodynamics Cluster Choking Multiscale Fluidization
ISSN号	0009-2509
英文摘要	Axial heterogeneity in circulating fluidized bed (CFB) risers is very important to the design of fluidized bed reactors, which is, however, still unable to be described in theory. Based on a successful description of local hydrodynamics in gas solid flow, the Energy-Minimization Multi-Scale (EMMS) theory further relates axial hydrodynamics with local and global stability conditions in the system, providing a theoretical way to account for the axial heterogeneity in CFB risers. This research reveals that the interaction between particle clusters and the dilute phase as well as the surrounding dense phase has a significant effect on their dynamical evolution. Similar to cluster diameter in the EMMS theory, number density of particle clusters serving as a comprehensive indicator to the heterogeneity in gas solid flow is constrained by both local and global stability conditions in the system. With the above cognition, a one-dimensional EMMS model is developed to perform steady-state modeling of the axial heterogeneity in CFB risers. The model successfully reproduces a complete transition zone and the parametric effects on it at the choking condition. The S-shaped axial voidage profile calculated by the one-dimensional EMMS model is in good agreement with the experimental results in gas solid fast fluidization. This research is not only the first step toward implementing the three-scale computation in virtual process engineering (VPE), but also of referential significance to industrial chemical process development. (C) 2013 Elsevier Ltd. 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]	FLOW ; VELOCITY
收录类别	SCI
语种	英语
WOS记录号	WOS:000320508200016
公开日期	2015-05-27
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/13339]
专题	过程工程研究所_研究所（批量导入）
作者单位	Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Hu, Shanwei,Liu, Xinhua,Li, Jinghai. Steady-state modeling of axial heterogeneity in CFB risers based on one-dimensional EMMS model[J]. CHEMICAL ENGINEERING SCIENCE,2013,96(0):165-173.
APA	Hu, Shanwei,Liu, Xinhua,&Li, Jinghai.(2013).Steady-state modeling of axial heterogeneity in CFB risers based on one-dimensional EMMS model.CHEMICAL ENGINEERING SCIENCE,96(0),165-173.
MLA	Hu, Shanwei,et al."Steady-state modeling of axial heterogeneity in CFB risers based on one-dimensional EMMS model".CHEMICAL ENGINEERING SCIENCE 96.0(2013):165-173.