Analytical approximation to the fully developed concentration profile of diffusive aerosol particles in laminar flow in a circular tube

被引：7
|
作者：
Alonso, M. [1 ]
Alguacil, F. J. [1 ]
Huang, C. -H. [2 ]
机构：
[1] CSIC, Natl Ctr Met Res, E-28040 Madrid, Spain
[2] Yuanpei Univ, Dept Environm Engn & Hlth, Hsinchu 300, Taiwan
来源：
JOURNAL OF AEROSOL SCIENCE | 2010年 / 41卷 / 04期
关键词：
Aerosol diffusion; Laminar flow tube; Fully developed concentration profile;
D O I：
10.1016/j.jaerosci.2010.02.003
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
An analytical approximation is presented for the dimensionless concentration profile n(r,x) of aerosol particles of diffusion coefficient D flowing with mean axial velocity (u) over bar in a cylindrical tube of length L and radius R, n(r,x) = n(max)(x)f(r)=C exp(-lambda beta x)[1- 1/11(18r(2)-9r(4)+2r(6))] wherein C=1.477 and lambda=3.659 are fit constants to the numerical solution of the convection-diffusion equation for beta x = DLx/(u) over barR(2) >= 0.2, i.e. for fully developed concentration profile. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：413 / 417
页数：5
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