文献类型：期刊文献

中文题名：三维交叉裂隙渗流传质特性数值模拟

英文题名：Numerical simulation on hydraulic and solute transport properties of 3D crossed fractures

作者：李博[1,2];黄嘉伦[1,2];钟振[1,2];邹良超[2,3]

机构：[1]绍兴文理学院岩石力学与地质灾害实验中心,浙江绍兴312000;[2]绍兴文理学院山体地质灾害与防治协同创新中心,浙江绍兴312000;[3]斯德哥尔摩大学自然地理系,瑞典斯德哥尔摩

年份：2019

卷号：40

期号：9

起止页码：3670

中文期刊名：岩土力学

外文期刊名：Rock and Soil Mechanics

收录：CSTPCD、、EI(收录号：20194907781516)、ESCI(收录号：WOS:000537293900042)、北大核心2017、Scopus(收录号：2-s2.0-85075793204)、CSCD2019_2020、WOS、北大核心、CSCD

基金：This work was supported by the Young Foundation of the National Natural Science of China (51509154, 51609136) and the Natural Science Foundation of Zhejiang Province (LR19E090001).

语种：中文

中文关键词：三维交叉裂隙;渗流特性;传质特性;Navier-Stokes方程;佩克莱数

外文关键词：3D crossed fractures;fluid flow behaviour;solute transport behaviour;Navier-Stokes equation;Peclet number

中文摘要：对交叉裂隙渗流传质特性的定量描述是研究整个裂隙网络渗透传质特性的基础。为真实模拟水流及溶质在三维交叉裂隙中的运移过程,首先通过三维轮廓仪获取天然岩石裂隙表面的形貌数据,再应用三维重构技术生成相应的三维交叉裂隙模型,随后求解Navier-Stokes方程,假定溶质运移满足Fick定律,模拟水流和溶质在三维交叉裂隙中的运移过程。通过对比粗糙裂隙模型与平行平板模型的模拟结果发现:粗糙度对流体的分布及流动状态存在显著的影响;不同进、出口工况下的流体流动及溶质运移状态亦表明:裂隙交叉的几何形貌会显著地影响溶质混合行为。这些结果表明,目前被广泛采用的平行平板模型在评估岩体内特别是交叉口的物质运移特性时将导致较大的偏差,在将来的研究中有必要针对裂隙交叉口的几何特征建立修正的模型以提高评估的准确性。

外文摘要：Quantitative description of fluid flow and solute transport properties of crossed fractures is a fundamental issue for understanding the characteristics of fracture networks. This study is aimed to simulate the fluid flow and solute transport through three-dimensional crossed fractures. The morphological data of the natural rock fracture surface was first obtained via a three-dimensional profilometer, and then a reconstruction technique was employed to generate the corresponding three-dimensional crossed fracture model. The Navier-Stokes equations were solved to simulate the fluid flow and solute transport through the intersection by assuming the solute transport satisfying the Fick’s law. Comparing the simulation results of the rough-walled model with the parallel-plate model, it was found that the surface roughness had a significant influence on the distribution and flow state of the fluid through the intersection. The results obtained from different inlet and outlet configurations showed that the geometry of intersection greatly affected the solute mixing process. These results revealed that the widely accepted parallel-plate model led to remarkable errors in the assessment of solute transport behaviour in fractured rock masses, especially the intersections. Therefore, it is necessary to establish modified models to improve the accuracy of the assessment in future studies.