The effect of spatial variation in potential energy on the diffusion in heterogeneous media

被引：6
|
作者：
Livshits, A. I. [1 ]
机构：
[1] Bonch Bruevich St Petersburg State Univ, 22-1 Prospekt Bolshevikov, St Petersburg 193232, Russia
来源：
PHYSICS LETTERS A | 2016年 / 380卷 / 22-23期
关键词：
Diffusion; Heterogeneous media; Membranes; Potential energy; Alloys;
D O I：
10.1016/j.physleta.2016.03.042
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The standard equation of diffusion in heterogeneous media is found to be incomplete. The effect of heterogeneity on diffusion phenomena is commonly considered to be caused by only spatial variations of diffusion coefficient while the spatial difference in the potential energy of diffusing particles due to their interactions with the inhomogeneous medium is not taken into consideration. The possibility of new transport phenomena in heterogeneous media follows from the corrected equation. In particular the great increase of hydrogen permeability through the membranes of metallic alloy is turned out possible due to an optimization of spatial distribution of the alloy composition. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：1891 / 1894
页数：4
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