Tracer transport in a rough rock fracture during shear: a numerical study
2006 (English)In: Proc of the 2nd International Conference on Coupled T-H-M-C Processes in Geo-Systems: Fundamentals, 575-580 p.Article in journal (Refereed) Published
The effects of translational shear on particle transport under coupled shear-flow testing conditions in a rough rock fracture were numerically investigated in this study. A pair of digitalized surfaces of a rough concrete fracture replica was numerically manipulated to simulate the translational shearing process without considering normal loading and asperity damage. From the evolutions of the aperture filed during shear, the evolutions of the fracture transmissivity field were determined. Undirectional and bi-directional fluid flow situations were considered, using Finite Element Method (FEM). The results show that translational shear makes rough fractures more permeable, producing a significant change in travel time of the particles. Translational shear yields a significant channelling effect in the direction perpendicular to the shear direction. Bi-directional flow patterns show clearly the shortcommings of the conventional laboratory shear-flow tests with unidirectional flow. These simulations provide a first step towards a better understanding of particle transport in rock fractures.
Place, publisher, year, edition, pages
2006. 575-580 p.
IdentifiersURN: urn:nbn:se:kth:diva-7466OAI: oai:DiVA.org:kth-7466DiVA: diva2:12498
QC 201008032007-09-102007-09-102010-08-03Bibliographically approved