Dissolution-precipitation-driven upward migration of a salt crust

被引：20
|
作者：
Licsandru, G. [1 ,2 ]
Noiriel, C. [1 ]
Duru, P. [2 ]
Geoffroy, S. [3 ]
Abou Chakra, A. [3 ]
Prat, M. [2 ]
机构：
[1] Univ Toulouse, GET, Observ Midi Pyrenees, CNRS,IRD, Toulouse, France
[2] Univ Toulouse, CNRS Toulouse, IMFT, Toulouse, France
[3] Univ Toulouse, UPS, INSAT, LMDC, Toulouse, France
来源：
PHYSICAL REVIEW E | 2019年 / 100卷 / 03期
关键词：
SODIUM-CHLORIDE; POROUS-MEDIUM; EVAPORATION; SURFACE; CRYSTALLIZATION; MEDIA;
D O I：
10.1103/PhysRevE.100.032802
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Salt crusts forming at the surface of a porous medium can dynamically evolve with crust displacements leading to the formations of domes and blisters or simply to the upward migration of the crust. However, the mechanisms explaining the displacements are unclear. It has been conjectured that they could be related to dissolution-precipitation phenomena and/or to mechanical effects associated with the concept of crystallization pressure. We present a simple experiment where the crust upward migration is significant and can be entirely explained from the consideration of dissolution-precipitation phenomena. Equations governing the crust displacement are derived, leading to quite good agreement with the experimental results.
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页数：9
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