IMECH-IR  > 流固耦合系统力学重点实验室
Fully coupled hydro-mechanical modeling of two-phase flow in deformable fractured porous media with discontinuous and continuous Galerkin method
Ma TR; Jiang LT; Shen WJ (沈伟军); Cao WZ; Guo CB; Nick HM
Source PublicationComputers and Geotechnics
2023-09
Volume164Pages:105823
ISSN0266-352X
Abstract

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.

DOI10.1016/j.compgeo.2023.105823
Indexed BySCI ; EI
Language英语
WOS IDWOS:001087761500001
Department深部资源与环境力学
Classification一类
Ranking1
ContributorShen WJ
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/92669
Collection流固耦合系统力学重点实验室
Corresponding AuthorShen WJ (沈伟军)
Affiliation1.School of Mechanics and Civil Engineering, China University of Mining and Technology
2.Danish Offshore Technology Centre, Technical University of Denmark
3.SinoProbe Laboratory, Chinese Academy of Geological Sciences
4.Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences
5.Department of Earth Science and Engineering, Imperial College London
Recommended Citation
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.Rp_Au:Shen WJ
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.
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