|
Titre :
|
Flow and diffusion in clays
|
|
Auteurs :
|
R. Hasenpatt ;
W. Degen ;
G. Kahr
|
|
Type de document :
|
article/chapitre/communication
|
|
Année de publication :
|
1989
|
|
Format :
|
p. 179-192
|
|
Note générale :
|
Bibliog.
|
|
Langues :
|
= Anglais
|
|
Catégories :
|
HYDRAULIQUE
SOL GEOLOGIE
|
|
Mots-clés :
|
ARGILE
;
ECOULEMENT
;
DIFFUSION
;
MECANIQUE DES SOLS
;
GRADIENT HYDRAULIQUE
|
|
Résumé :
|
Generally, two transport mechanisms can be distinguished in a clay : (1) diffusion, for which the propelling force is the concentration gradient of the diffusing ions ; and (2) flow, for which the propelling force is water pressure gradient. These two transport phenomena are compared for the stationary and transient cases. The similarities and differences between diffusion and flow are demonstrated in an example. The mathematical solutions for the different boundary conditions are explained. Finally, the changes in a clay caused by chemically contaminated water are demonstrated in an extreme example.
|
|
Source :
|
Applied clay science, vol 4
|
