Taylor dispersion in a two-zone packed tube

doi:10.1016/j.ijheatmasstransfer.2011.08.037

CORC > 北京大学 > 工学院

	Taylor dispersion in a two-zone packed tube
	Chen, G. Q. ; Wu, Zi
刊名	国际传热与传质杂志
	2012
关键词	Taylor dispersion Porous media Perturbation analysis Mass transfer DIAMETER-DEPENDENT DISPERSION BOUNDARY-CONDITIONS POISEUILLE FLOW BEAD PACKS FLUID ATHEROSCLEROSIS INTERFACE SURFACE
DOI	10.1016/j.ijheatmasstransfer.2011.08.037
英文摘要	Heterogeneity of media distribution in a packed tube plays an important role on scalar dispersion by enhancing the transverse non-uniformity of the flow velocity. Presented in this paper is a theoretical analysis for an instantaneous release of scalar substance into a fully developed flow through a long tube of two zones distinctively packed with porous media. The velocity distribution of the flow through the tube is derived, with the known solution for a single zone tube flow included as a special case. Mei's perturbation analysis for scalar dispersion in a single phase fluid flow is rigorously generalized for the two-zone case of a tube flow to develop a dispersion model by averaging the concentration transport equation. Corresponding dispersivity is analytically determined, and Taylor's well-known result for a single-zone tube flow is recovered by setting corresponding parameters as unity. The enhancement of the dispersion by the heterogeneity and the dependence of the enhanced dispersion on the tube radius are illustrated and characterized by relevant dimensionless parameters. (C) 2011 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000297429600005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Thermodynamics; Engineering, Mechanical; Mechanics; SCI(E); EI; 21; ARTICLE; 1-3; 43-52; 55
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154655]
专题	工学院
推荐引用方式 GB/T 7714	Chen, G. Q.,Wu, Zi. Taylor dispersion in a two-zone packed tube[J]. 国际传热与传质杂志,2012.
APA	Chen, G. Q.,&Wu, Zi.(2012).Taylor dispersion in a two-zone packed tube.国际传热与传质杂志.
MLA	Chen, G. Q.,et al."Taylor dispersion in a two-zone packed tube".国际传热与传质杂志 (2012).