Ferrofluidic Couette flow in time-varying magnetic field

Despite time-dependent boundary conditions being ubiquitous in natural and industrial flows, to date the influence of such temporal modulations (e.g. with driving frequency O_H) has been given minor attention. The present problem addresses ferrofluidic Couette flow in between counter-rotating cylind...

ver descrição completa

Detalhes bibliográficos
Autor: Altmeyer, Sebastian Andreas|||0000-0001-5964-0203
Tipo de documento: artigo
Data de publicação:2022
País:España
Recursos:Universitat Politècnica de Catalunya (UPC)
Repositório:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglês
OAI Identifier:oai:upcommons.upc.edu:2117/371817
Acesso em linha:https://hdl.handle.net/2117/371817
https://dx.doi.org/10.1016/j.jmmm.2022.169205
Access Level:Acceso aberto
Palavra-chave:Taylor vortices
Magnetic fluids
Nonlinear systems
Taylor-Couette flow
Ferrofluid
Time-varying magnetic fields
Non-linear dynamics
Instabilities
Bifurcation theory
Vòrtexs de Taylor
Sistemes no lineals
Àrees temàtiques de la UPC::Física
id ES_4099d8a268be77d6c3d735c1268e2be2
oai_identifier_str oai:upcommons.upc.edu:2117/371817
network_acronym_str ES
network_name_str España
repository_id_str
spelling Ferrofluidic Couette flow in time-varying magnetic fieldAltmeyer, Sebastian Andreas|||0000-0001-5964-0203Taylor vorticesMagnetic fluidsNonlinear systemsTaylor-Couette flowFerrofluidTime-varying magnetic fieldsNon-linear dynamicsInstabilitiesBifurcation theoryVòrtexs de TaylorSistemes no linealsÀrees temàtiques de la UPC::FísicaDespite time-dependent boundary conditions being ubiquitous in natural and industrial flows, to date the influence of such temporal modulations (e.g. with driving frequency O_H) has been given minor attention. The present problem addresses ferrofluidic Couette flow in between counter-rotating cylinders in a spatially homogeneous magnetic field subject to time-periodic modulation. Such a modulation can lead to a significant inner Reynolds number (Re_i) enhancement for both, either helical and toroidal flow structures. Using a modified Niklas approximation, the effect of low- and high-frequency modulation onto the primary instabilities, stability boundaries as well as on the non-linear oscillations that may occur is investigated. Focusing on bi-stable co-existing solutions, around their stability thresholds quite complex non-linear system response and flow dynamics is detected. For the system remaining supercritical always a single solution is selected by O_H, while crossing the bifurcation thresholds within a modulation period the triggered system response is more complex, reaching from alternation between different solutions towards the appearance of intermittent behavior.Peer Reviewed20222022-06-1520222022-08-26journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/371817https://dx.doi.org/10.1016/j.jmmm.2022.169205reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3718172026-05-27T15:37:01Z
dc.title.none.fl_str_mv Ferrofluidic Couette flow in time-varying magnetic field
title Ferrofluidic Couette flow in time-varying magnetic field
spellingShingle Ferrofluidic Couette flow in time-varying magnetic field
Altmeyer, Sebastian Andreas|||0000-0001-5964-0203
Taylor vortices
Magnetic fluids
Nonlinear systems
Taylor-Couette flow
Ferrofluid
Time-varying magnetic fields
Non-linear dynamics
Instabilities
Bifurcation theory
Vòrtexs de Taylor
Sistemes no lineals
Àrees temàtiques de la UPC::Física
title_short Ferrofluidic Couette flow in time-varying magnetic field
title_full Ferrofluidic Couette flow in time-varying magnetic field
title_fullStr Ferrofluidic Couette flow in time-varying magnetic field
title_full_unstemmed Ferrofluidic Couette flow in time-varying magnetic field
title_sort Ferrofluidic Couette flow in time-varying magnetic field
dc.creator.none.fl_str_mv Altmeyer, Sebastian Andreas|||0000-0001-5964-0203
author Altmeyer, Sebastian Andreas|||0000-0001-5964-0203
author_facet Altmeyer, Sebastian Andreas|||0000-0001-5964-0203
author_role author
dc.subject.none.fl_str_mv Taylor vortices
Magnetic fluids
Nonlinear systems
Taylor-Couette flow
Ferrofluid
Time-varying magnetic fields
Non-linear dynamics
Instabilities
Bifurcation theory
Vòrtexs de Taylor
Sistemes no lineals
Àrees temàtiques de la UPC::Física
topic Taylor vortices
Magnetic fluids
Nonlinear systems
Taylor-Couette flow
Ferrofluid
Time-varying magnetic fields
Non-linear dynamics
Instabilities
Bifurcation theory
Vòrtexs de Taylor
Sistemes no lineals
Àrees temàtiques de la UPC::Física
description Despite time-dependent boundary conditions being ubiquitous in natural and industrial flows, to date the influence of such temporal modulations (e.g. with driving frequency O_H) has been given minor attention. The present problem addresses ferrofluidic Couette flow in between counter-rotating cylinders in a spatially homogeneous magnetic field subject to time-periodic modulation. Such a modulation can lead to a significant inner Reynolds number (Re_i) enhancement for both, either helical and toroidal flow structures. Using a modified Niklas approximation, the effect of low- and high-frequency modulation onto the primary instabilities, stability boundaries as well as on the non-linear oscillations that may occur is investigated. Focusing on bi-stable co-existing solutions, around their stability thresholds quite complex non-linear system response and flow dynamics is detected. For the system remaining supercritical always a single solution is selected by O_H, while crossing the bifurcation thresholds within a modulation period the triggered system response is more complex, reaching from alternation between different solutions towards the appearance of intermittent behavior.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-06-15
2022
2022-08-26
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/371817
https://dx.doi.org/10.1016/j.jmmm.2022.169205
url https://hdl.handle.net/2117/371817
https://dx.doi.org/10.1016/j.jmmm.2022.169205
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869406767913369600
score 15,300719

Registros relacionados