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Nonequilibrium Casimir pressures in liquids under shear

dc.contributor.authorOrtiz De Zárate Leira, José María
dc.contributor.authorKirkpatrick, T. R.
dc.contributor.authorSengers, J. V.
dc.date.accessioned2023-06-17T13:35:10Z
dc.date.available2023-06-17T13:35:10Z
dc.date.issued2019-08
dc.description© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature 2019. We thank J.R. Dorfman for valuable discussions and R. Monchaux for some comments regarding Couette-flow experiments. We are indebted to R. A. Perkins for providing us with the relevant thermophysical-property information for liquid water and liquid argon. The research at the Complutense University was supported by grant ESP2017-83544-C3-2-P of the Spanish Agencia Estatal de Investigación. The research at the University of Maryland was supported by the US National Science Foundation under Grant No. DMR-1401449.
dc.description.abstractIn 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.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)
dc.description.sponsorshipUS National Science Foundation
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/58007
dc.identifier.doi10.1140/epje/i2019-11868-9
dc.identifier.issn1292-8941
dc.identifier.officialurlhttp://dx.doi.org/10.1140/epje/i2019-11868-9
dc.identifier.relatedurlhttps://link.springer.com/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/13804
dc.issue.number8
dc.journal.titleEuropean physical journal E
dc.language.isoeng
dc.publisherSpringer
dc.relation.projectIDESP2017-83544-C3-2-P
dc.relation.projectIDDMR-1401449
dc.rights.accessRightsopen access
dc.subject.cdu536
dc.subject.keywordMode-coupling theory
dc.subject.keywordLong-time tails
dc.subject.keywordHydrodynamic fluctuations
dc.subject.keywordStress-tensor
dc.subject.keywordMolecular-dynamics
dc.subject.keywordViscosity
dc.subject.keywordHard
dc.subject.keywordTransition
dc.subject.keywordBehavior
dc.subject.ucmTermodinámica
dc.subject.unesco2213 Termodinámica
dc.titleNonequilibrium Casimir pressures in liquids under shear
dc.typejournal article
dc.volume.number42
dspace.entity.typePublication
relation.isAuthorOfPublicationd2b809b1-3ba2-407e-add2-8b8251e306ba
relation.isAuthorOfPublication.latestForDiscoveryd2b809b1-3ba2-407e-add2-8b8251e306ba

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