Transient shear banding in time-dependent fluids

We study the dynamics of shear-band formation and evolution using a simple rheological model. The description couples the local structure and viscosity to the applied shear stress. We consider in detail the Couette geometry, where the model is solved iteratively with the Navier-Stokes equation to ob...

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Autores: Illa i Tortós, Xavier, Puisto, Antti, Lehtinen, Arttu, Mohtaschemi, Mikael, Alava, Mikko J.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/60723
Acceso en línea:https://hdl.handle.net/2445/60723
Access Level:acceso abierto
Palabra clave:Fluids complexos
Reologia
Mecànica de fluids
Complex fluids
Rheology
Fluid mechanics
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spelling Transient shear banding in time-dependent fluidsIlla i Tortós, XavierPuisto, AnttiLehtinen, ArttuMohtaschemi, MikaelAlava, Mikko J.Fluids complexosReologiaMecànica de fluidsComplex fluidsRheologyFluid mechanicsWe study the dynamics of shear-band formation and evolution using a simple rheological model. The description couples the local structure and viscosity to the applied shear stress. We consider in detail the Couette geometry, where the model is solved iteratively with the Navier-Stokes equation to obtain the time evolution of the local velocity and viscosity fields. It is found that the underlying reason for dynamic effects is the nonhomogeneous shear distribution, which is amplified due to a positive feedback between the flow field and the viscosity response of the shear thinning fluid. This offers a simple explanation for the recent observations of transient shear banding in time-dependent fluids. Extensions to more complicated rheological systems are considered.American Physical Society2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/60723Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.87.022307Physical Review E, 2013, vol. 87, num. 022307, p. 022307-1-022307-5http://dx.doi.org/10.1103/PhysRevE.87.022307(c) American Physical Society, 2013info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/607232026-05-27T06:46:51Z
dc.title.none.fl_str_mv Transient shear banding in time-dependent fluids
title Transient shear banding in time-dependent fluids
spellingShingle Transient shear banding in time-dependent fluids
Illa i Tortós, Xavier
Fluids complexos
Reologia
Mecànica de fluids
Complex fluids
Rheology
Fluid mechanics
title_short Transient shear banding in time-dependent fluids
title_full Transient shear banding in time-dependent fluids
title_fullStr Transient shear banding in time-dependent fluids
title_full_unstemmed Transient shear banding in time-dependent fluids
title_sort Transient shear banding in time-dependent fluids
dc.creator.none.fl_str_mv Illa i Tortós, Xavier
Puisto, Antti
Lehtinen, Arttu
Mohtaschemi, Mikael
Alava, Mikko J.
author Illa i Tortós, Xavier
author_facet Illa i Tortós, Xavier
Puisto, Antti
Lehtinen, Arttu
Mohtaschemi, Mikael
Alava, Mikko J.
author_role author
author2 Puisto, Antti
Lehtinen, Arttu
Mohtaschemi, Mikael
Alava, Mikko J.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Fluids complexos
Reologia
Mecànica de fluids
Complex fluids
Rheology
Fluid mechanics
topic Fluids complexos
Reologia
Mecànica de fluids
Complex fluids
Rheology
Fluid mechanics
description We study the dynamics of shear-band formation and evolution using a simple rheological model. The description couples the local structure and viscosity to the applied shear stress. We consider in detail the Couette geometry, where the model is solved iteratively with the Navier-Stokes equation to obtain the time evolution of the local velocity and viscosity fields. It is found that the underlying reason for dynamic effects is the nonhomogeneous shear distribution, which is amplified due to a positive feedback between the flow field and the viscosity response of the shear thinning fluid. This offers a simple explanation for the recent observations of transient shear banding in time-dependent fluids. Extensions to more complicated rheological systems are considered.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/60723
url https://hdl.handle.net/2445/60723
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.87.022307
Physical Review E, 2013, vol. 87, num. 022307, p. 022307-1-022307-5
http://dx.doi.org/10.1103/PhysRevE.87.022307
dc.rights.none.fl_str_mv (c) American Physical Society, 2013
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2013
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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