Viscous Fingering and Gravity Segregation through Porous Media: Experimental Findings

Earth Interactions

FarhatAbbas¹ 

关键词: Viscous fingering;    Gravity segregation;    Miscible displacement;   

DOI  :  10.1175/2010EI348.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

Abstract During downward vertical flow of a viscous solution, the viscous fingering (VF) phenomenon affects miscible displacement of solutes through a soil profile. On the other hand, during horizontal flow, when the liquid residing in a horizontal bed of porous materials is displaced by another liquid of different density, the resulting hydrodynamic dispersion is modified by the formation of a tongue of denser liquid undershooting the less dense liquid, a phenomenon known as gravity segregation (GS). To explore VF and GS phenomena, the authors present laboratory experimental results on the vertical and horizontal transport of bulk solution and ions of different concentrations and/or densities through inert and reactive porous media. The study showed that, with miscible liquids, breakthrough starts later and ends earlier. The authors predicted the behavior of immiscible liquids by the nondimensional gravity segregation number β: that is, with increase in β, the segregation becomes extreme. The curve fitti...

【 授权许可】

Unknown