Large Eddy Simulation of Turbulent Flow and Mixing Time in a Gas-Liquid Stirred Tank

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	Large Eddy Simulation of Turbulent Flow and Mixing Time in a Gas-Liquid Stirred Tank
	Zhang, Qinghua 1; Yang, Chao 1,2; Mao, Zai-Sha 1; Mu, Junjuan 3
刊名	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
	2012-08-01
卷号	51 期号:30 页码:10124-10131
关键词	TURBINE-AGITATED VESSELS BUBBLE-COLUMN REACTORS DUAL RUSHTON TURBINES NUMERICAL-SIMULATION AXIAL-DISPERSION MESH METHODOLOGY CFD SIMULATIONS IMPELLER HOMOGENIZATION LES
ISSN号	0888-5885
通讯作者	Yang, C
英文摘要	Mixing time is a key parameter relevant to the scale-up and design of agitated reactors. Although there have been many published papers on mixing times in stirred tanks predicted by computational fluid dynamics (CFD), there are few reports on the large eddy simulation (LES) based prediction of the mixing time in a gas liquid stirred tank. In this work, an LES method based on an Eulerian-Eulerian model is presented for predicting the mixing time in a gas liquid stirred tank agitated by a Rushton turbine. In order to verify the simulated results, mixing time experiments were carried out using a conductivity technique. In the present LES, the Smagorinsky subgrid scale model was used to model the effect of subgrid scale on the resolved scales. The concentration distributions and operating parameters such as feed positions, impeller speeds, and gas flow rates on the mixing time were examined. It is shown that the predicted concentration distributions of tracers are more irregular and realistic by using LES. Also, the mixing time decreases with the increase of impeller speed. However, with increasing gas flow rate, the mixing time first increases and then levels off. The predicted mixing time by the LES method shows good agreement with the measured values.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	TURBINE-AGITATED VESSELS ; BUBBLE-COLUMN REACTORS ; DUAL RUSHTON TURBINES ; NUMERICAL-SIMULATION ; AXIAL-DISPERSION ; MESH METHODOLOGY ; CFD SIMULATIONS ; IMPELLER ; HOMOGENIZATION ; LES
收录类别	SCI
语种	英语
WOS记录号	WOS:000306941500025
公开日期	2013-10-15
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/3544]
专题	过程工程研究所_生化工程国家重点实验室
作者单位	1.Chinese Acad Sci, Natl Key Lab Biochem Engn, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China 2.Jiangsu Marine Resources Dev Res Inst, Lianyungang 222005, Peoples R China 3.Wison Engn Ltd, Beijing 100102, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qinghua,Yang, Chao,Mao, Zai-Sha,et al. Large Eddy Simulation of Turbulent Flow and Mixing Time in a Gas-Liquid Stirred Tank[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2012,51(30):10124-10131.
APA	Zhang, Qinghua,Yang, Chao,Mao, Zai-Sha,&Mu, Junjuan.(2012).Large Eddy Simulation of Turbulent Flow and Mixing Time in a Gas-Liquid Stirred Tank.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,51(30),10124-10131.
MLA	Zhang, Qinghua,et al."Large Eddy Simulation of Turbulent Flow and Mixing Time in a Gas-Liquid Stirred Tank".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 51.30(2012):10124-10131.