A pore-scale numerical model for non-Darcy fluid flow through rough-walled fractures. (July 2017)

• Record Type: Journal Article
• Authors: Zhang, Wei; Dai, Beibing; Liu, Zhen; Zhou, Cuiying
• Is Part Of: Computers and geotechnics. Volume 87(2017)
• Page Start: 139
• Page End: 148
• Publication Date: 2017-07
• Subjects: Non-Darcy flow -- Pore-scale -- Seepage -- Fracture -- Numerical -- Model; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2017.02.011
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: This paper aims at developing a pore-scale numerical model for non-Darcy fluid flow through rough-walled fractures. A simple general relationship between the local hydraulic conductivity and the flow velocity is proposed. A new governing equation for non-Darcy fluid flow through rough-walled fractures is then derived by introducing this relationship into the Reynolds equation. Based on the non-linear finite element method, a self-developed code is used to simulate the non-Darcy fluid flow through fractures. It is found that the macroscopic results obtained by the numerical simulation agree well with the experimental results. Furthermore, some interesting experimental observations can be reproduced.