文献类型：期刊文献

英文题名：Effects of intersection and dead-end of fractures on nonlinear flow and particle transport in rock fracture networks

作者：Liu, Richeng[1];Jiang, Yujing[2,3,4];Li, Bo[2,5]

机构：[1]Nagasaki Univ, Grad Sch Engn, 1-14 Bunkyo Machi, Nagasaki 8528521, Japan;[2]Nagasaki Univ, Sch Engn, 1-14 Bunkyo Machi, Nagasaki 8528521, Japan;[3]Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266510, Peoples R China;[4]Shandong Univ Sci & Technol, Minist Sci & Technol, Qingdao 266510, Peoples R China;[5]Shaoxing Univ, Rock Mech & Geohazards Ctr, Shaoxing 312000, Peoples R China

年份：2016

卷号：20

期号：3

起止页码：415

外文期刊名：GEOSCIENCES JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000377223000012)、、Scopus(收录号：2-s2.0-84957595338)、WOS

基金：This study has been partially funded by Grant-in-Aid for Young Scientists (B), Japan ( Grant No. 15K18302), China Scholarship Council (CSC) and National Natural Science Foundation of China ( Grant No. 51379117). These supports are gratefully acknowledged.

语种：英文

外文关键词：fracture intersection; dead-end fracture; discrete fracture network; particle transport; Navier-Stokes equations; nonlinear flow

外文摘要：Fluid flow tests were conducted on three artificial rock fracture network models to visually investigate the behaviors of fluid flow and solute transport within the fracture intersections, by using the visualization techniques with a CCD camera. Numerical simulations by solving the Navier-Stokes equations were performed to simulate the fluid flow and solute transport based on the experimental models, and to extensively estimate the effects of fracture intersection and dead-end in fracture networks. The results show that for the crossed fracture models, when the Reynolds number (Re) of the inlet is larger than 1, a nonlinear flow regime starts to appear where the proportion of the flow rates in the two outlets change nonlinearly. When calculating the fluid flow in discrete fracture network (DFN) models, it is found that the critical condition of applying the local cubic law to model fluid flow in each single fracture in DFNs is J a parts per thousand currency sign 10(-5), where J is the hydraulic gradient. Beyond this value, the deviation of applying the cubic law increases remarkably with increasing hydraulic gradient. The effects of dead-ends of fractures on fluid flow are negligible, however, they have a strong impact on the breakthrough curves of particles in DFNs with the relative time deviation rate in the range of 5-35%.