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Type: Journal article
Title: Influences of connectivity and conductivity on nonlinear flow behaviours through three-dimension discrete fracture networks
Author: Xiong, F.
Jiang, Q.
Xu, C.
Zhang, X.
Zhang, Q.
Citation: Computers and Geotechnics, 2019; 107:128-141
Publisher: Elsevier
Issue Date: 2019
ISSN: 0266-352X
Statement of
Feng Xiong, Qinghui Jiang, Chaoshui Xu, Xiaobo Zhang, Qihua Zhang
Abstract: A numerical procedure about nonlinear flow in three-dimension discrete fracture networks was developed by solving the Reynolds equation and Forchheimer equation using the Galerkin method. The numerical simulation results of three intersecting models were compared with experimental data and a good agreement was observed. Based on further applications of the model to fracture networks with the consideration of Barton’s and Chen’s empirical model, it was found that nonlinear fluid flows in fracture networks could be appropriately described by the Forchheimer equation. The smoother the fracture surfaces and the greater the connectivity of the fracture network are, the lower the hydraulic gradient for the onset of nonlinear flows is.
Keywords: Discrete fracture network; nonlinear flow; fracture network connectivity; fracture surface roughness; dimensionless percolation density; critical hydraulic gradient
Rights: © 2018 Elsevier Ltd. All rights reserved.
RMID: 0030105517
DOI: 10.1016/j.compgeo.2018.11.014
Appears in Collections:Civil and Environmental Engineering publications

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