NDLI: Shear-Induced Flow Channels in a Single Rock Fracture and Their Effect on Solute Transport

Content Provider	Springer Nature Link
Author	Vilarrasa, Victor Koyama, Tomofumi Neretnieks, Ivars Jing, Lanru
Copyright Year	2010
Abstract	The effect of mechanical shearing on fluid flow anisotropy and solute transport in rough rock fractures was investigated by numerical modeling. Two facing surfaces of a rock fracture of 194 mm × 194 mm in size were laser scanned to generate their respective digital profiles. Fluid flow through the fracture was simulated using a finite element code that solves the Reynolds equation, while incremental relative movement of the upper surface was maintained numerically to simulate a shearing process without normal loading. The motion of solute particles in a rough fracture undergoing shear was studied using a particle tracking code. We found that shearing introduces anisotropy in fracture transmissivity, with a greatly increased flow rate and particle travel velocity in the direction perpendicular to the shearing direction. Shear-induced channels yield a transport behavior in which advection dominates in the direction parallel with shear and dispersion dominates in the direction perpendicular to shear. The shear-induced flow channels not only increase the flow connectivity, but also the transport connectivity in the direction perpendicular to shear. This finding has an important impact on the interpretation of the results of coupled hydromechanical and tracer transport experiments for measurements of hydraulic and transport properties of rock fractures.
Starting Page	503
Ending Page	523
Page Count	21
File Format	PDF
ISSN	01693913
Journal	Transport in Porous Media
Volume Number	87
Issue Number	2
e-ISSN	15731634
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-12-22
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Rock fracture Shear displacement Coupled hydro-mechanical behavior Transport connectivity Particle tracking Hydrogeology Civil Engineering Industrial Chemistry/Chemical Engineering Geotechnical Engineering Classical Continuum Physics
Content Type	Text
Resource Type	Article
Subject	Catalysis

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