水资源与水工程学报Issue(2)：195-199,5.DOI:10.11705/j.issn.1672-643X.2014.02.42
单裂隙渗流有限元数值仿真研究
Study on simulation of single fracture seepage based on finite element method
摘要
Abstract
According to the creeping flow equation and Navier -Stokes equation , the paper set up single asperity rough fracture geometry physical model and simulated the seepage behavior of single asperity rough fracture and true formation fracture by using finite element method ( FEM ) .It also comparatively analyzed the fluid flow characteristics and flow field distribution in the fracture .The paper defined two parameters of roughness that the coarse correlation R0 equals to 2A/b min , inclined rough index R1 equals to 2A/λ.The analysis showed that the single fracture walls don't participate in fluid flow and viscous force has great influence;the rough fracture fluid forms a fan-shaped distribution along the wall and may pro-duce the phenomenon of “backflow”.The asperity height and density can be used to describe fracture surface roughness .The asperity height and fluid pressure difference showed a negative correlation , while the relation of asperity density and fluid pressure is positive .R0 and R1 are inversely proportional to the Reynolds number and flow rate .The critical value of R1 is 0.714.关键词
裂隙/粗糙/微凸体/流场/仿真Key words
fracture/roughness/asperity/flow field/simulation分类
建筑与水利引用本文复制引用
赵强,李皋,肖贵林,辛春彦,程纯勇..单裂隙渗流有限元数值仿真研究[J].水资源与水工程学报,2014,(2):195-199,5.基金项目
中央财政支持地方高校发展专项资金（ P027）；教育部博士点基金项目（20125121110001）。 （）
