Modeling the axial hydrodynamics of gas-solid counter-current downers

doi:10.1016/j.partic.2019.08.001

	Modeling the axial hydrodynamics of gas-solid counter-current downers
	Liu, Juanbo 1,2; Liu, Xinhua 1; Zhang, Zhixin 1; Zhao, Hui 3; Ge, Wei 1,2
刊名	PARTICUOLOGY
	2020-06-01
卷号	50 页码:135-143
关键词	Mathematical modeling Counter-current downer Flooding EMMS Mesoscale
ISSN号	1674-2001
DOI	10.1016/j.partic.2019.08.001
英文摘要	Gas-solid counter-current downer reactors, in which particles move downward in an upward gas flow, can achieve high solid concentration for high heat and/or mass transfer rates. However, the particles may reverse their direction or even be carried out of the reactor as the gas flow rate increases. This is closely related to "flooding" in counter-current flows. The energy minimization multiscale (EMMS) model well describes multiscale heterogeneity in gas-solid cocurrent upward flows. It is further developed to simulate gas-solid counter-current downward flows because similar heterogeneity can also be found in downers. The model characterizes well the axial hydrodynamics and predicts an inflexional voidage variation with superficial gas velocity in the fully developed region. This is supported by a simulation based on computational fluid dynamics and the discrete element method. The flooding predicted by the model agrees better with experiment than previous models. (C) 2019 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA07080400] ; Informationization Program of the Chinese Academy of Sciences[XXH13506-301]
WOS关键词	FLOW ; HETEROGENEITY
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000524974400014
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences ; Informationization Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/40120]
专题	中国科学院过程工程研究所
通讯作者	Liu, Xinhua; Ge, Wei
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100490, Peoples R China 3.China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266555, Peoples R China
推荐引用方式 GB/T 7714	Liu, Juanbo,Liu, Xinhua,Zhang, Zhixin,et al. Modeling the axial hydrodynamics of gas-solid counter-current downers[J]. PARTICUOLOGY,2020,50:135-143.
APA	Liu, Juanbo,Liu, Xinhua,Zhang, Zhixin,Zhao, Hui,&Ge, Wei.(2020).Modeling the axial hydrodynamics of gas-solid counter-current downers.PARTICUOLOGY,50,135-143.
MLA	Liu, Juanbo,et al."Modeling the axial hydrodynamics of gas-solid counter-current downers".PARTICUOLOGY 50(2020):135-143.