Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media

The continuous time random walk (CTRW) approach has been widely applied to model large-scale non-Fickian transport in the flow through disordered media. Often the underlying microscopic transport mechanisms and disorder characteristics are not known, and their effect on large-scale solute dispersion...

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Detalhes bibliográficos
Autores: Yu, Xiangnan, Dentz, Marco, Sun, Hongguang, Zhang, Yong
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2024
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/352573
Acesso em linha:http://hdl.handle.net/10261/352573
https://api.elsevier.com/content/abstract/scopus_id/85187963206
Access Level:acceso abierto
Palavra-chave:Porous Media
Transport phenomena
http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/6
Ensure availability and sustainable management of water and sanitation for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
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spelling Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered mediaYu, XiangnanDentz, MarcoSun, HongguangZhang, YongPorous MediaTransport phenomenahttp://metadata.un.org/sdg/9http://metadata.un.org/sdg/6Ensure availability and sustainable management of water and sanitation for allBuild resilient infrastructure, promote inclusive and sustainable industrialization and foster innovationThe continuous time random walk (CTRW) approach has been widely applied to model large-scale non-Fickian transport in the flow through disordered media. Often the underlying microscopic transport mechanisms and disorder characteristics are not known, and their effect on large-scale solute dispersion is encoded by a heavy-tailed transition time distribution. Here we study how the microscale physics manifests in the CTRW framework and how it affects solute dispersion. To this end, we consider transport in disordered media with random sorption and random flow properties. Both disorder mechanisms can give rise to anomalous particle transport. We present the CTRW models corresponding to each of these physical scenarios to discuss the different manifestations of microscale heterogeneity on large-scale dispersion depending on the particle injection modes. The combined impact of random sorption and advection is studied with a CTRW model that explicitly represents both microscale disorder mechanisms. While random advection and sorption may show similar large-scale transport behaviors, they can be clearly distinguished in their response to uniform injection conditions and, in general, to initial particle distributions that are not flux weighted. These findings highlight the importance of the microscale physics for the interpretation and prediction of anomalous dispersion phenomena in disordered media.Peer reviewedAmerican Physical Society0000-0002-1097-42340000-0002-3940-282X0000-0002-8422-3871Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/352573https://api.elsevier.com/content/abstract/scopus_id/85187963206reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésPhysical Review Fluidshttps://doi.org/10.1103/PhysRevFluids.9.034502Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3525732026-05-22T06:33:51Z
dc.title.none.fl_str_mv Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media
title Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media
spellingShingle Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media
Yu, Xiangnan
Porous Media
Transport phenomena
http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/6
Ensure availability and sustainable management of water and sanitation for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
title_short Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media
title_full Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media
title_fullStr Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media
title_full_unstemmed Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media
title_sort Impact of microscale physics in continuous time random walks for hydrodynamic dispersion in disordered media
dc.creator.none.fl_str_mv Yu, Xiangnan
Dentz, Marco
Sun, Hongguang
Zhang, Yong
author Yu, Xiangnan
author_facet Yu, Xiangnan
Dentz, Marco
Sun, Hongguang
Zhang, Yong
author_role author
author2 Dentz, Marco
Sun, Hongguang
Zhang, Yong
author2_role author
author
author
dc.contributor.none.fl_str_mv 0000-0002-1097-4234
0000-0002-3940-282X
0000-0002-8422-3871
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Porous Media
Transport phenomena
http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/6
Ensure availability and sustainable management of water and sanitation for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
topic Porous Media
Transport phenomena
http://metadata.un.org/sdg/9
http://metadata.un.org/sdg/6
Ensure availability and sustainable management of water and sanitation for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
description The continuous time random walk (CTRW) approach has been widely applied to model large-scale non-Fickian transport in the flow through disordered media. Often the underlying microscopic transport mechanisms and disorder characteristics are not known, and their effect on large-scale solute dispersion is encoded by a heavy-tailed transition time distribution. Here we study how the microscale physics manifests in the CTRW framework and how it affects solute dispersion. To this end, we consider transport in disordered media with random sorption and random flow properties. Both disorder mechanisms can give rise to anomalous particle transport. We present the CTRW models corresponding to each of these physical scenarios to discuss the different manifestations of microscale heterogeneity on large-scale dispersion depending on the particle injection modes. The combined impact of random sorption and advection is studied with a CTRW model that explicitly represents both microscale disorder mechanisms. While random advection and sorption may show similar large-scale transport behaviors, they can be clearly distinguished in their response to uniform injection conditions and, in general, to initial particle distributions that are not flux weighted. These findings highlight the importance of the microscale physics for the interpretation and prediction of anomalous dispersion phenomena in disordered media.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/352573
https://api.elsevier.com/content/abstract/scopus_id/85187963206
url http://hdl.handle.net/10261/352573
https://api.elsevier.com/content/abstract/scopus_id/85187963206
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Physical Review Fluids
https://doi.org/10.1103/PhysRevFluids.9.034502
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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