Memory effects in a gas of viscoelastic particles

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Show simple item record Mompo Pavesi, Emanuel Gaston López Castaño, M. A. Lasanta Becerra, Antonio Vega Reyes, F. Torrente Orihuela, Ester Aurora 2022-09-14T11:35:06Z 2022-09-14T11:35:06Z 2021-06-01
dc.identifier.bibliographicCitation Mompo Pavesi, E. G., López Castaño, M. A., Lasanta Becerra, A., Vega Reyes, F., & Torrente Orihuela, E. A. (2021). Memory effects in a gas of viscoelastic particles. Physics of Fluids, 33, 1-11.
dc.identifier.issn 1070-6631
dc.description.abstract We study a granular gas of viscoelastic particles (kinetic energy loss upon collision is a function of the particles' relative velocities at impact) subject to a stochastic thermostat. We show that the system displays anomalous cooling and heating rates during thermal relaxation processes, this causing the emergence of thermal memory. In particular, a significant Mpemba effect is present, i.e., an initially hotter/cooler granular gas can cool down/heat up faster than an in comparison cooler/hotter granular gas. Moreover, a Kovacs effect is also observed, i.e., a nonmonotonic relaxation of the granular temperature¿if the gas undergoes certain sudden temperature changes before fixing its value. Our results show that both memory effects have distinct features, very different and eventually opposed to those reported in theory for granular fluids under simpler collisional models. We study our system via three independent methods: approximate solution of the kinetic equation time evolution and computer simulations (both molecular dynamics simulations and direct simulation Monte Carlo method), finding good agreement between them.
dc.description.sponsorship This work has been partially funded by the Spanish Ministerio de Ciencia, Innovación y Universidades and the Agencia Estatal de Investigación through Grant Nos. MTM2017-84446-C2–2-R (A.L., E.M., and A.T.), FIS2017-84440-C2–2-P (A.T.), and FIS2016-76359-P. (F.V.R.). M.A.L.C. and F.V.R. also acknowledge support from the regional Extremadura Government through Project Nos. GR18079 and IB16087. Computing facilities from the Extremadura Research Centre for Advanced Technologies (CETA-CIEMAT) are also acknowledged. All grants and facilities were provided with partial support from the ERDF.
dc.format.extent 11
dc.language.iso eng
dc.publisher AIP
dc.rights © 2021 Author(s). Published under an exclusive license by AIP Publishing.
dc.subject.other Rigid body dynamics
dc.subject.other Thermal instruments
dc.subject.other Molecular dynamics
dc.subject.other Monte Carlo methods
dc.subject.other Computational fluid dynamics
dc.subject.other Viscoelasticity
dc.subject.other Mpemba effect
dc.title Memory effects in a gas of viscoelastic particles
dc.type article
dc.subject.eciencia Física
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. MTM2017-84446-C2-2-R
dc.relation.projectID Gobierno de España. FIS2017-84440-C2-2-P
dc.relation.projectID Gobierno de España. FIS2016-76359-P
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationissue 6
dc.identifier.publicationlastpage 11
dc.identifier.publicationtitle Physics of Fluids
dc.identifier.publicationvolume 33
dc.identifier.uxxi AR/0000028751
dc.contributor.funder Ministerio de Ciencia, Innovación y Universidades (España)
dc.contributor.funder Agencia Estatal de Investigación (España)
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