Shear-induced anisotropy and heterogeneity of fluid flow in a single rock fracture with translational and rotary shear displacements: a numerical study
2004 (English)In: International Journal of Rock Mechanics And Mining Sciences, ISSN 1365-1609, Vol. 41, no 3, 426-426 p.Article in journal (Refereed) Published
The effects of rotary shear displacements on fluid flow rates and patterns under shear-flow test conditions were numerically investigated in this paper. A pair of digitized surfaces of a concrete fracture replica of size 250 x 250mm was numerically manipulated to simulate the translational and rotary shearing processes of the sample, which provided the evolution of the aperture distributions during shearing and was used to determine the evolution of the fracture transmissivity field. The translational shear test has bidirectional (x and y) hydraulic head boundary conditions and shearing in the x-direction with 1mm shear displacement interval up to 20mm. The rotary shear test has a 0.5° rotation interval up to 90°. The results of flow simulations show that with increasing rotary shear, the flow rate increases but its pattern becomes rapidly isotropic. For bi-directional translational flow, the flow rate increases with shear but significant channelling, anisotropy and heterogeneity developed with shear displacement. The above flow simulations illustrated the more realistic flow patterns under general fracture deformation modes of translation and rotation, and provided insights for the design of more flexible and complementary laboratory coupled stressflow tests.
Place, publisher, year, edition, pages
2004. Vol. 41, no 3, 426-426 p.
Anisotropy; Finite Element Method (FEM); Flow analysis; Heterogeneity; Single rock fracture; Translational and rotary shear; Anisotropy; Boundary conditions; Channel flow; Computer simulation; Deformation; Fracture mechanics; Rock mechanics; Shear stress
IdentifiersURN: urn:nbn:se:kth:diva-7464DOI: 10.1016/j.ijrmms.2004.03.067ISI: 000221685000059ScopusID: 2-s2.0-3042778186OAI: oai:DiVA.org:kth-7464DiVA: diva2:12496
QC 20100803. Konferens: Regional ISRM Sinorock 2004 Symposium, China, May 18-21, 2004. International Society of Rock Mechanics.2007-09-102007-09-102010-08-16Bibliographically approved