Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convection

In a recent letter (C. Giraudet et al., EPL 111, 60013 (2015)) we reported preliminary data showing evidence of a slowing-down of non-equilibrium fluctuations of the concentration in thermodiffusion experiments on a binary mixture of miscible fluids. The reason for this slowing-down was attributed t...

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Authors: Giraudet, Cédric, Bataller, Henri, Sun, Yifei, Donev, Aleksandar, Ortiz De Zárate Leira, José María, Croccolo, Fabrizio
Format: article
Publication Date:2016
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/17710
Online Access:https://hdl.handle.net/20.500.14352/17710
Access Level:Open access
Keyword:536
Mass-transport properties
Liquid-mixtures
Free-diffusion
Thermal-diffusion
Light-scattering
Soret
Gravity
Equilibrium
Fluid
Microgravity
Termodinámica
2213 Termodinámica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/17710
network_acronym_str ES
network_name_str España
repository_id_str
spelling Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convectionGiraudet, CédricBataller, HenriSun, YifeiDonev, AleksandarOrtiz De Zárate Leira, José MaríaCroccolo, Fabrizio536Mass-transport propertiesLiquid-mixturesFree-diffusionThermal-diffusionLight-scatteringSoretGravityEquilibriumFluidMicrogravityTermodinámica2213 TermodinámicaIn a recent letter (C. Giraudet et al., EPL 111, 60013 (2015)) we reported preliminary data showing evidence of a slowing-down of non-equilibrium fluctuations of the concentration in thermodiffusion experiments on a binary mixture of miscible fluids. The reason for this slowing-down was attributed to the effect of confinement. Such tentative explanation is here experimentally corroborated by new measurements and theoretically substantiated by studying analytically and numerically the relevant fluctuating hydrodynamics equations. In the new experiments presented here, the magnitude of the temperature gradient is changed, confirming that the system is controlled solely by the solutal Rayleigh number, and that the slowing-down is dominated by a combined effect of the driving force of buoyancy, the dissipating force of diffusion and the confinement provided by the vertical extension of the sample cell. Moreover, a compact phenomenological interpolating formula is proposed for easy analysis of experimental results.SpringerUniversidad Complutense de Madrid20162016-12-1220162016-12-12journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/17710reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/177102026-06-02T12:44:21Z
dc.title.none.fl_str_mv Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convection
title Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convection
spellingShingle Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convection
Giraudet, Cédric
536
Mass-transport properties
Liquid-mixtures
Free-diffusion
Thermal-diffusion
Light-scattering
Soret
Gravity
Equilibrium
Fluid
Microgravity
Termodinámica
2213 Termodinámica
title_short Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convection
title_full Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convection
title_fullStr Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convection
title_full_unstemmed Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convection
title_sort Confinement effect on the dynamics of non-equilibrium concentration fluctuations far from the onset of convection
dc.creator.none.fl_str_mv Giraudet, Cédric
Bataller, Henri
Sun, Yifei
Donev, Aleksandar
Ortiz De Zárate Leira, José María
Croccolo, Fabrizio
author Giraudet, Cédric
author_facet Giraudet, Cédric
Bataller, Henri
Sun, Yifei
Donev, Aleksandar
Ortiz De Zárate Leira, José María
Croccolo, Fabrizio
author_role author
author2 Bataller, Henri
Sun, Yifei
Donev, Aleksandar
Ortiz De Zárate Leira, José María
Croccolo, Fabrizio
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 536
Mass-transport properties
Liquid-mixtures
Free-diffusion
Thermal-diffusion
Light-scattering
Soret
Gravity
Equilibrium
Fluid
Microgravity
Termodinámica
2213 Termodinámica
topic 536
Mass-transport properties
Liquid-mixtures
Free-diffusion
Thermal-diffusion
Light-scattering
Soret
Gravity
Equilibrium
Fluid
Microgravity
Termodinámica
2213 Termodinámica
description In a recent letter (C. Giraudet et al., EPL 111, 60013 (2015)) we reported preliminary data showing evidence of a slowing-down of non-equilibrium fluctuations of the concentration in thermodiffusion experiments on a binary mixture of miscible fluids. The reason for this slowing-down was attributed to the effect of confinement. Such tentative explanation is here experimentally corroborated by new measurements and theoretically substantiated by studying analytically and numerically the relevant fluctuating hydrodynamics equations. In the new experiments presented here, the magnitude of the temperature gradient is changed, confirming that the system is controlled solely by the solutal Rayleigh number, and that the slowing-down is dominated by a combined effect of the driving force of buoyancy, the dissipating force of diffusion and the confinement provided by the vertical extension of the sample cell. Moreover, a compact phenomenological interpolating formula is proposed for easy analysis of experimental results.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-12-12
2016
2016-12-12
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/20.500.14352/17710
url https://hdl.handle.net/20.500.14352/17710
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
_version_ 1869403062411460608
score 15,300719

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