Effect of anisotropy of fracture surface on fluid flow
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A4 Artikkeli konferenssijulkaisussa
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Date
2023-01-10
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
Series
IOP Conference Series: Earth and Environmental Science, Volume 1124
Abstract
Characterization of fluid flow through rough fractures is an important issue in designing underground excavations, such as nuclear repositories or geothermal applications. Fluid flow could be influenced by several parameters such as contact areas, aperture, hydraulic and mechanical conditions. Contact area and aperture could be two crucial geometrical factors which control hydraulic and mechanical behaviors of fractures. These factors are rarely isotropic, and anisotropy is observed in different directions. In this research, photogrammetry, as a high precision method, was used to analyze morphology of a tensile fracture induced in granite. Experimental and numerical stress-flow tests on rock fracture were conducted in two different directions with diverse normal stresses and water pressures. Analyzing the regenerated 3D model of the fracture and hydromechanical tests predicts the anisotropy in flow rates in different directions. Numerical and experimental results are well fitted particularly in low-stress conditions. The obtained results show that anisotropy affects permeability since outlet flow rates in the different directions with the same initial water pressures differ by 7 % in experiments and 4% in numerical modeling.Description
Keywords
Other note
Citation
Torkan, M, Hosseini Khorasgani, AMIR, Uotinen, L, Baghbanan, A & Rinne, M 2023, ' Effect of anisotropy of fracture surface on fluid flow ', IOP Conference Series: Earth and Environmental Science, vol. 1124, no. 1, 012036 . https://doi.org/10.1088/1755-1315/1124/1/012036