Implementation and validation of pressure-dependent gas permeability model for bentonite in FEM code Thebes

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorGupta, Abhishek
dc.contributor.authorAbed, Ayman
dc.contributor.authorSołowski, Wojciech T.
dc.contributor.departmentDepartment of Civil Engineering
dc.contributor.departmentChalmers University of Technology
dc.contributor.departmentDepartment of Civil Engineeringen
dc.date.accessioned2023-05-31T10:51:36Z
dc.date.available2023-05-31T10:51:36Z
dc.date.issued2023-04-24
dc.descriptionPublisher Copyright: © The Authors, published by EDP Sciences, 2023.
dc.description.abstractIn an Engineered Barrier System of a nuclear waste repository, gas migrates through: a) diffusion/advection of dissolved gases, b) two-phase continuum flow, c) dilatant pathway flow and d) single-phase gas flow through macro-fractures in the soil. The gas production rate and the corresponding gas pressure accumulation affect the clay material behaviour and its properties such as air entry value. For the safe design of the EBS system, computational models need to account for the identified transport mechanisms. This study presents an enhancement in the finite element code Thebes [1, 2] that replicates the observed increase in permeability at higher gas pressures, e.g. due to pore dilatancy and gas fracture as proposed by Xu et al. [3]. The formulation links permeability to gas pressure and threshold/critical pressure. For model validation, the study utilizes a gas injection experiment carried out in IfG (Institute for Rock Mechanics, Germany) on Opalinus Clay [4]. The results show a good fit against the measurements while giving insight into gas flow through clays.en
dc.description.versionPeer revieweden
dc.format.extent6
dc.format.mimetypeapplication/pdf
dc.identifier.citationGupta , A , Abed , A & Sołowski , W T 2023 , ' Implementation and validation of pressure-dependent gas permeability model for bentonite in FEM code Thebes ' , E3S Web of Conferences , vol. 382 , 02005 . https://doi.org/10.1051/e3sconf/202338202005en
dc.identifier.doi10.1051/e3sconf/202338202005
dc.identifier.issn2555-0403
dc.identifier.otherPURE UUID: 29a9fb63-2fab-4773-9f4f-2fefef2b46e7
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/29a9fb63-2fab-4773-9f4f-2fefef2b46e7
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85159313227&partnerID=8YFLogxK
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/111845374/e3sconf_unsat2023_02005.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/121163
dc.identifier.urnURN:NBN:fi:aalto-202305313498
dc.language.isoenen
dc.publisherEDP Sciences
dc.relation.ispartofseriesE3S Web of Conferencesen
dc.relation.ispartofseriesVolume 382en
dc.rightsopenAccessen
dc.titleImplementation and validation of pressure-dependent gas permeability model for bentonite in FEM code Thebesen
dc.typeConference articlefi
dc.type.versionpublishedVersion
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