Extension of the bifurcation method for diffusion coefficients to porous medium transport

被引：2

作者：

Descamps, C ^{[1
]}

Vignoles, GL ^{[1
]}

机构：

[1] CNRS, UMR 5801, SNECMA, CEA,UBI,Lab Composites Thermostruct, F-33600 Pessac, France

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE B-MECANIQUE | 2000年 / 328卷 / 06期

关键词：

multicomponent diffusion; porous media; approximation method;

D O I：

10.1016/S1620-7742(00)00038-6

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We present an extension of Bartlett's bifurcation method for the approximate computation of multicomponent diffusion coefficients in a gaseous mixture to diffusion in porous media. On behalf of the remark that the bifurcation coefficients F-i are merely proportional to the square root of the molar masses nil,, we state that Knudsen diffusion may also be represented through some bifurcation factor FK. This approximation is tested in a variety of cases, displaying good results except for very light gas species. (C) 2000 Academie des sciences/Editions scientifiques et medicales Elsevier SAS.

引用

页码：465 / 470

页数：6