中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Fully coupled hydro-mechanical modeling of two-phase flow in deformable fractured porous media with discontinuous and continuous Galerkin method

文献类型:期刊论文

作者Ma TR; Jiang LT; Shen WJ (沈伟军); Cao WZ; Guo CB; Nick HM
刊名Computers and Geotechnics
出版日期2023-09
卷号164页码:105823
DOI10.1016/j.compgeo.2023.105823
英文摘要

Discrete fracture and matrix modeling of coupled flow and geomechanics is instrumental for understanding flow in fractured media for various geoengineering applications such as enhanced geothermal energy systems and groundwater remediation. We employ the governing equations for two-phase flow in deformable fractured porous media with a stress-dependent porosity and permeability model of matrix, and variable fracture aperture and the corresponding permeability. A finite element framework is presented, in which fractures are regarded as low-dimensional objects, to discretize the coupled two-phase flow and geomechanics in fractured porous media. A hybrid method, combining discontinuous Galerkin (DG) and continuous Galerkin (CG) finite element methods (FEM), is utilized to solve for the two-phase flow, while the solid deformation is approximated using a discontinuous Galerkin FEM approach. Several benchmark cases are utilized to examine the accuracy of the proposed hybrid DG-CG FEM method. Further validation is performed using more complex, realistic fracture configurations. As the mechanical characteristics of the fracture and the surrounding matrix differ, the simulation results demonstrate that displacement and stress are discontinuous on both sides of the fracture. While the case with low permeability fractures exhibits pressure jump across the fractures, the pressure changes are reasonably smooth for the conduit fractures.

分类号一类
语种英语
源URL[http://dspace.imech.ac.cn/handle/311007/92669]  
专题力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者Shen WJ (沈伟军)
作者单位1.Department of Earth Science and Engineering, Imperial College London
2.Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences
3.SinoProbe Laboratory, Chinese Academy of Geological Sciences
4.Danish Offshore Technology Centre, Technical University of Denmark
5.School of Mechanics and Civil Engineering, China University of Mining and Technology
推荐引用方式
GB/T 7714
Ma TR,Jiang LT,Shen WJ ,et al. Fully coupled hydro-mechanical modeling of two-phase flow in deformable fractured porous media with discontinuous and continuous Galerkin method[J]. Computers and Geotechnics,2023,164:105823.
APA Ma TR,Jiang LT,Shen WJ ,Cao WZ,Guo CB,&Nick HM.(2023).Fully coupled hydro-mechanical modeling of two-phase flow in deformable fractured porous media with discontinuous and continuous Galerkin method.Computers and Geotechnics,164,105823.
MLA Ma TR,et al."Fully coupled hydro-mechanical modeling of two-phase flow in deformable fractured porous media with discontinuous and continuous Galerkin method".Computers and Geotechnics 164(2023):105823.

入库方式: OAI收割

来源:力学研究所

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