Fluid transmission in a single fracture simulated by using a modified fluid flow algorithm in the DEM
Journal
ISRM International Symposium - EUROCK 2020
ISBN (of the container)
9788282080729
Date Issued
2020
Author(s)
Chiu, C.C.
Abstract
This study proposed a modified fluid flow algorithm merged with the particulate interface model in the particulate discrete element method to evaluate fluid transmission in rock fractures. The analytical solution of fluid transmission in a single fracture is first derived, then the theory of the modified fluid flow algorithm and the particulate interface model used in the particulate discrete element method are further introduced. To validate the correctness of the proposed model, the simulated hydraulic conductivity under fracture closure and dilation are compared with the analytical solution. After that, the simulated water head in a single fracture under un-shear and shear conditions are validated by the analytical solution. Furthermore, a re-meshing technique to handle the variation of pore mesh has been proposed to support the operation of the modified fluid flow algorithm during shearing. Finally, simple cases about fluid transmission in multiple fractures are demonstrated to prove the performance of the proposed model in investigating rock hydraulic problems. © International Society for Rock Mechanics and Rock Engineering Norwegian Group for Rock Mechanics
Event(s)
ISRM International Symposium - EUROCK 2020
Subjects
Discrete element method
Fluid transmission
Fracture
Rock hydraulics
Seepage
Publisher
International Society for Rock Mechanics
Description
ISRM International Symposium - EUROCK 2020, 14 June 2020 through 19 June 2020, Trondheim, Virtual
Type
conference paper