BULK AND SURFACE-DIFFUSION IN POROUS-MEDIA - AN APPLICATION OF THE SURFACE-AVERAGING THEOREM

被引：0

作者：

OCHOATAPIA, JA

DELRIO, JA

WHITAKER, S

机构：

[1] UNIV CALIF DAVIS, DEPT CHEM ENGN, DAVIS, CA 95616 USA

[2] INST TECNOL CELAYA, DEPT INGN QUIM, CELAYA 38010, GUANAJUATO, MEXICO

[3] Univ Nacl Autonoma Mexico, IIM, ENERGIA SOLAR LAB, ZONA CULTURAL XOCHICALO, TEMIXCO 62580, MORELOS, MEXICO

来源：

CHEMICAL ENGINEERING SCIENCE | 1993年 / 48卷 / 11期

关键词：

D O I：

暂无

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A general treatment of bulk and surface diffusion is presented in terms of the method of volume averaging. In addition to the spatial-averaging theorem, the analysis requires the surface-averaging theorem, which is derived using only routine three-space vector analysis. The closure problem is formulated and overall effective diffusivities are calculated using Chang's unit cell, which leads to Maxwell's model.

引用

页码：2061 / 2082

页数：22

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