MRT-LBM-based numerical simulation of seepage flow through fractal fracture networks

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	MRT-LBM-based numerical simulation of seepage flow through fractal fracture networks
	Fan Huo1,2,3 ; Zheng Hong 1
刊名	SCIENCE CHINA-TECHNOLOGICAL SCIENCES
	2013-12-01
卷号	56 期号:12 页码:3115-3122
关键词	MRT-LBM fractal interpolation fracture networks seepage flow simulation microcosmic mechanism
ISSN号	1674-7321
通讯作者	Zheng Hong
英文摘要	The study on seepage flow passing through single fractures is essential and critical for understanding of the law of seepage flow passing through fracture networks and the coupling mechanisms of seepage field and stress field in rock masses. By using the fractal interpolation to reconstruct a natural coarse fracture, as well as taking into account the microstructure of the fracture, the numerical simulation of seepage flow passing through the coarse fractures with two distinct vertical scaling factors is conducted based on the MRT-LBM model of the lattice Boltzmann method. Then, after obtaining the length of the preferential flow pathway, the permeability of the two kinds of fractures is estimated respectively. In view of difficulties in locating the preferential flow pathway of natural fracture networks, by numerical tests a transect permeability weighted algorithm for estimating the fracture network permeability is proposed. The algorithm is not specific to one or more particular preferential flow pathways, but considers the contribution of each section to hinder the fluid passing through the medium. In order to apply the new algorithm, by capturing the structure of fracture networks based on the image-processing technique, the numerical simulations of seepage flow passing through two groups of natural fracture networks is carried out, the permeability is forecasted and the partial flows are reproduced for both cases. It is found that the preferential flow pathway emerges at the beginning of evolution, then is strengthened subsequently, and finally reaches a steady status. Furthermore, by using the proposed method some details on local flow can be clearly observed such as backflows and vortices at local branches can exist simultaneously and so forth, suggesting the validness of the proposed method for multiscale simulations of seepage flow.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Multidisciplinary ; Materials Science, Multidisciplinary
研究领域[WOS]	Engineering ; Materials Science
关键词[WOS]	VARIATIONAL INEQUALITY FORMULATION ; LATTICE BOLTZMANN METHOD ; UNCONFINED SEEPAGE ; ROCK ; SURFACES ; MEDIA
收录类别	SCI
语种	英语
WOS记录号	WOS:000328263600025
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/8324]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Fan Huo,Zheng Hong. MRT-LBM-based numerical simulation of seepage flow through fractal fracture networks[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2013,56(12):3115-3122.
APA	Fan Huo,&Zheng Hong.(2013).MRT-LBM-based numerical simulation of seepage flow through fractal fracture networks.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,56(12),3115-3122.
MLA	Fan Huo,et al."MRT-LBM-based numerical simulation of seepage flow through fractal fracture networks".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 56.12(2013):3115-3122.