Dissolution patterns and mixing dynamics in unstable reactive flow

We study the fundamental problem of mixing and chemical reactions under a Rayleigh-Taylor-type hydrodynamic instability in a miscible two-fluid system. The dense fluid mixture, which is generated at the fluid-fluid interface, leads to the onset of a convective fingering instability and triggers a fa...

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Detalles Bibliográficos
Autores: Hidalgo, Juan J., Dentz, Marco, Cabeza, Yoar, Carrera, Jesús
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/140772
Acceso en línea:http://hdl.handle.net/10261/140772
Access Level:acceso abierto
Palabra clave:Convection
Dissolution patterns
Fluid deformation
Mixing
Porous media
Reactive transport
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spelling Dissolution patterns and mixing dynamics in unstable reactive flowHidalgo, Juan J.Dentz, MarcoCabeza, YoarCarrera, Jesús ConvectionDissolution patternsFluid deformationMixingPorous mediaReactive transportWe study the fundamental problem of mixing and chemical reactions under a Rayleigh-Taylor-type hydrodynamic instability in a miscible two-fluid system. The dense fluid mixture, which is generated at the fluid-fluid interface, leads to the onset of a convective fingering instability and triggers a fast chemical dissolution reaction. Contrary to intuition, the dissolution pattern does not map out the finger geometry. Instead, it displays a dome-like, hierarchical structure that follows the path of the ascending fluid interface and the regions of maximum mixing. These mixing and reaction hot spots coincide with the flow stagnation points, at which the interfacial mixing layer is compressed and deformed. We show that the deformation of the boundary layer around the stagnation points controls the evolution of the global scalar dissipation and reaction rates and shapes the structure of the reacted zones. The persistent compression of the mixing layer explains the independence of the mixing rate from the Rayleigh number when convection dominates. ©2015. American Geophysical Union. All Rights Reserved.Data used for producing the figures can be obtained by solving the respective equations given in the manuscript. JJH and MD acknowledge the support of the European Research Council through the project MHetScale (FP7-IDEAS-ERC-617511). YC acknowledges funding by the FP7 EU project TRUST (FP7-ENERGY- 309067). JC acknowledges funding by the Spanish Ministry of Economy and Competitiveness project MEDISTRAES (CGL2013-48869-C2-1-R).Peer reviewedAmerican Geophysical UnionEuropean Research CouncilConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201620162015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/140772reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/61751110.1002/2015GL065036Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1407722026-05-22T06:33:51Z
dc.title.none.fl_str_mv Dissolution patterns and mixing dynamics in unstable reactive flow
title Dissolution patterns and mixing dynamics in unstable reactive flow
spellingShingle Dissolution patterns and mixing dynamics in unstable reactive flow
Hidalgo, Juan J.
Convection
Dissolution patterns
Fluid deformation
Mixing
Porous media
Reactive transport
title_short Dissolution patterns and mixing dynamics in unstable reactive flow
title_full Dissolution patterns and mixing dynamics in unstable reactive flow
title_fullStr Dissolution patterns and mixing dynamics in unstable reactive flow
title_full_unstemmed Dissolution patterns and mixing dynamics in unstable reactive flow
title_sort Dissolution patterns and mixing dynamics in unstable reactive flow
dc.creator.none.fl_str_mv Hidalgo, Juan J.
Dentz, Marco
Cabeza, Yoar
Carrera, Jesús
author Hidalgo, Juan J.
author_facet Hidalgo, Juan J.
Dentz, Marco
Cabeza, Yoar
Carrera, Jesús
author_role author
author2 Dentz, Marco
Cabeza, Yoar
Carrera, Jesús
author2_role author
author
author
dc.contributor.none.fl_str_mv European Research Council
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Convection
Dissolution patterns
Fluid deformation
Mixing
Porous media
Reactive transport
topic Convection
Dissolution patterns
Fluid deformation
Mixing
Porous media
Reactive transport
description We study the fundamental problem of mixing and chemical reactions under a Rayleigh-Taylor-type hydrodynamic instability in a miscible two-fluid system. The dense fluid mixture, which is generated at the fluid-fluid interface, leads to the onset of a convective fingering instability and triggers a fast chemical dissolution reaction. Contrary to intuition, the dissolution pattern does not map out the finger geometry. Instead, it displays a dome-like, hierarchical structure that follows the path of the ascending fluid interface and the regions of maximum mixing. These mixing and reaction hot spots coincide with the flow stagnation points, at which the interfacial mixing layer is compressed and deformed. We show that the deformation of the boundary layer around the stagnation points controls the evolution of the global scalar dissipation and reaction rates and shapes the structure of the reacted zones. The persistent compression of the mixing layer explains the independence of the mixing rate from the Rayleigh number when convection dominates. ©2015. American Geophysical Union. All Rights Reserved.
publishDate 2015
dc.date.none.fl_str_mv 2015
2016
2016
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/10261/140772
url http://hdl.handle.net/10261/140772
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/617511
10.1002/2015GL065036
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
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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