Influence of the particle diameter and porosity of packed porous media on the mixing of hot and cold fluids in a T-junction

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	Influence of the particle diameter and porosity of packed porous media on the mixing of hot and cold fluids in a T-junction
	Wang, Yongwei 1,2; Lu, Tao 2
刊名	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
	2015-05-01
卷号	84 页码:680-690
关键词	Porous structure Particle diameter Porosity Thermal fluctuation Mixing T-junction
英文摘要	Fluid flow and heat transfer when cold and hot fluids mix in a T-junction packed with spherical particles have been numerically investigated using large eddy simulations (LES) with the sub-grid scale Smagorinsky-Lilly model. The numerical results of both normalized time-averaged temperature and normalized root mean square temperature were found to be in good agreement with experimental data. Numerical simulations of three porous structures with different particle diameters and porosity were completed, in order to evaluate the effect of particle diameter and porosity on fluctuations in temperature and velocity. The results indicate that the velocity and temperature fluctuations decrease gradually with increasing particle diameter and decreasing porosity of the porous medium. The pressure drop increases sharply (by a factor of similar to 8) as the particle diameter increases from 26 mm to 30 mm and the porosity decreases from 0.4 to 0.2. That are caused stronger inertial resistance and viscous resistance, the effective thermal conductivity increase and the turbulent mixing weakened as the particle diameter increases and the porosity decreases. (C) 2015 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Thermodynamics ; Engineering ; Mechanics
关键词[WOS]	CONVECTION HEAT-TRANSFER ; TEMPERATURE-FLUCTUATIONS ; NUMERICAL EXPERIMENTS ; FORCED-CONVECTION ; SOLUTE TRANSPORT ; TEE ; FLOW ; SIMULATION ; MASS ; LES
收录类别	SCI
语种	英语
WOS记录号	WOS:000351799000068
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98942]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Beijing Univ Chem Technol, Coll Mech & Elect Engn, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yongwei,Lu, Tao. Influence of the particle diameter and porosity of packed porous media on the mixing of hot and cold fluids in a T-junction[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2015,84:680-690.
APA	Wang, Yongwei,&Lu, Tao.(2015).Influence of the particle diameter and porosity of packed porous media on the mixing of hot and cold fluids in a T-junction.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,84,680-690.
MLA	Wang, Yongwei,et al."Influence of the particle diameter and porosity of packed porous media on the mixing of hot and cold fluids in a T-junction".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 84(2015):680-690.