Nonequilibrium Casimir pressures in liquids under shear

In stationary nonequilibrium states coupling between hydrodynamic modes causes thermal fluctuations to become long ranged inducing nonequilibrium Casimir pressures. Here we consider nonequilibrium Casimir pressures induced in liquids by a velocity gradient. Specifically, we have obtained explicit ex...

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Detalles Bibliográficos
Autores: Ortiz De Zárate Leira, José María, Kirkpatrick, T. R., Sengers, J. V.
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/13804
Acceso en línea:https://hdl.handle.net/20.500.14352/13804
Access Level:acceso abierto
Palabra clave:536
Mode-coupling theory
Long-time tails
Hydrodynamic fluctuations
Stress-tensor
Molecular-dynamics
Viscosity
Hard
Transition
Behavior
Termodinámica
2213 Termodinámica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/13804
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network_name_str España
repository_id_str
spelling Nonequilibrium Casimir pressures in liquids under shearOrtiz De Zárate Leira, José MaríaKirkpatrick, T. R.Sengers, J. V.536Mode-coupling theoryLong-time tailsHydrodynamic fluctuationsStress-tensorMolecular-dynamicsViscosityHardTransitionBehaviorTermodinámica2213 TermodinámicaIn stationary nonequilibrium states coupling between hydrodynamic modes causes thermal fluctuations to become long ranged inducing nonequilibrium Casimir pressures. Here we consider nonequilibrium Casimir pressures induced in liquids by a velocity gradient. Specifically, we have obtained explicit expressions for the magnitude of the shear-induced pressure enhancements in a liquid layer between two horizontal plates that complete and correct results previously presented in the literature. In contrast to nonequilibrium Casimir pressures induced by a temperature or concentration gradient, we find that in shear nonequilibrium contributions from short-range fluctuations are no longer negligible. In addition, it is noted that currently available computer simulations of model fluids in shear observe effects from molecular correlations at nanoscales that have a different physical origin and do not probe shear-induced pressures resulting from coupling of long-wavelength hydrodynamic modes. Even more importantly, we find that in actual experimental conditions, shear-induced pressure enhancements are caused by viscous heating and not by thermal velocity fluctuations. Hence, isothermal computer simulations are irrelevant for the interpretation of experimental shear-induced pressure enhancements.SpringerUniversidad Complutense de Madrid20192019-08-0120192019-08-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/13804reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/138042026-06-02T12:44:21Z
dc.title.none.fl_str_mv Nonequilibrium Casimir pressures in liquids under shear
title Nonequilibrium Casimir pressures in liquids under shear
spellingShingle Nonequilibrium Casimir pressures in liquids under shear
Ortiz De Zárate Leira, José María
536
Mode-coupling theory
Long-time tails
Hydrodynamic fluctuations
Stress-tensor
Molecular-dynamics
Viscosity
Hard
Transition
Behavior
Termodinámica
2213 Termodinámica
title_short Nonequilibrium Casimir pressures in liquids under shear
title_full Nonequilibrium Casimir pressures in liquids under shear
title_fullStr Nonequilibrium Casimir pressures in liquids under shear
title_full_unstemmed Nonequilibrium Casimir pressures in liquids under shear
title_sort Nonequilibrium Casimir pressures in liquids under shear
dc.creator.none.fl_str_mv Ortiz De Zárate Leira, José María
Kirkpatrick, T. R.
Sengers, J. V.
author Ortiz De Zárate Leira, José María
author_facet Ortiz De Zárate Leira, José María
Kirkpatrick, T. R.
Sengers, J. V.
author_role author
author2 Kirkpatrick, T. R.
Sengers, J. V.
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 536
Mode-coupling theory
Long-time tails
Hydrodynamic fluctuations
Stress-tensor
Molecular-dynamics
Viscosity
Hard
Transition
Behavior
Termodinámica
2213 Termodinámica
topic 536
Mode-coupling theory
Long-time tails
Hydrodynamic fluctuations
Stress-tensor
Molecular-dynamics
Viscosity
Hard
Transition
Behavior
Termodinámica
2213 Termodinámica
description In stationary nonequilibrium states coupling between hydrodynamic modes causes thermal fluctuations to become long ranged inducing nonequilibrium Casimir pressures. Here we consider nonequilibrium Casimir pressures induced in liquids by a velocity gradient. Specifically, we have obtained explicit expressions for the magnitude of the shear-induced pressure enhancements in a liquid layer between two horizontal plates that complete and correct results previously presented in the literature. In contrast to nonequilibrium Casimir pressures induced by a temperature or concentration gradient, we find that in shear nonequilibrium contributions from short-range fluctuations are no longer negligible. In addition, it is noted that currently available computer simulations of model fluids in shear observe effects from molecular correlations at nanoscales that have a different physical origin and do not probe shear-induced pressures resulting from coupling of long-wavelength hydrodynamic modes. Even more importantly, we find that in actual experimental conditions, shear-induced pressure enhancements are caused by viscous heating and not by thermal velocity fluctuations. Hence, isothermal computer simulations are irrelevant for the interpretation of experimental shear-induced pressure enhancements.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-08-01
2019
2019-08-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/13804
url https://hdl.handle.net/20.500.14352/13804
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
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
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301629

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