Effects of multi-level surface roughness on solute transport in single rock fractures
Natural rock fractures are consisted by complicate rough surfaces with multi-level surface roughness which causes significant uncertainties in fluid flow and solute transport behaviors through fractured rocks. In this study, for the aim of investigation the effects of multilevel surface roughness on fluid flow and solute transport in rock fractures, a single roughwalled fracture model was built from a scanned granite rock surface, which was then gradually decomposed and characterized by wavelet analysis and statistics. A verified finite volume method (FVM) code was used to simulate fluid flow and solute transport in the rough fracture models by solving the Navier-Stokes equations (NSE) and advection-dispersion equation (ADE). The simulation results of nonlinear flow and solute breakthrough curves (BTCs) showed that the multi-level surface roughness strongly correlated with the Eddy flows and the solute non- Fickian transport behaviors, represented by the changes of effective advective flow apertures and an empirical function of the BTCs. The results would improve our understanding of solute transport in fractured rocks and may help to reduce the uncertainties and risks in related engineering practices.
L. Zou L. Jing V. Cvetkovic
Department of sustainable development, environmental science and engineering, Royal Institute of Technology, Stockholm, Sweden
国际会议
西安
英文
247-260
2016-05-25（万方平台首次上网日期，不代表论文的发表时间）