The effects of viscous heating and the pressure-dependent viscosity on liquid flow in microtubes

IMECH-IR > 力学所知识产出(1956-2008)

	The effects of viscous heating and the pressure-dependent viscosity on liquid flow in microtubes
	Li ZH(李战华); Cui HH; Silber-Li, ZH (reprint author), CAS, Inst Mech, LNM, Beijing, Peoples R China.
会议录名称	ICMM 2005, Proceedings of the 3rd International Conference on Microchannels and Minichannels, Pt A
	2005
会议名称	3rd International Conference on Microchannels and Minichannels
会议日期	JUN 13-15, 2005
会议地点	Univ Toronto, Toronto, CANADA
摘要	The flow characteristics of isopropanol. in microtubes driven by a high pressure ranging from 1 MPa to 30 MPa are studied in this paper. The diameters of the microtubes are from 3 mu m to 100 mu n. The Reynolds number ranges from 0.1 to 1000 approximately. From the present experimental results, two reverse trends of the normalized friction coefficient C* are found for the various diameters. From the analysis of several possible factors, it may be seen that the pressure-dependence viscosity and viscous heating play the leading role. The relationship of viscosity versus pressure pointed out that the viscosity of most liquids, except the water, augmented with the increase of pressure. The analysis based on the energy equation turns out that pressure drop, specific heat, density, flow rate and heat resistance decide the average temperature rise due to viscous dissipation. Therefore, above two factors are treated as the function of pressure. An exponential function with the dependence of pressure is introduced into Hagen-Poiseuille (HP) equation to counteract the difference between experimental and theoretical values. Consequently, C* exhibits different trends which is decided by the relative importance of viscous heating and the pressure-dependent viscosity.
WOS记录号	WOS:000243025300025
ISBN号	0-7918-4185-5
收录类别	CPCI-S
语种	英语
引用统计
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/58902
专题	力学所知识产出(1956-2008)
通讯作者	Silber-Li, ZH (reprint author), CAS, Inst Mech, LNM, Beijing, Peoples R China.
推荐引用方式 GB/T 7714	Li ZH,Cui HH,Silber-Li, ZH . The effects of viscous heating and the pressure-dependent viscosity on liquid flow in microtubes[C]ICMM 2005, Proceedings of the 3rd International Conference on Microchannels and Minichannels, Pt A,2005.

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