Stabilized convection in a ternary mixture with two Soret coefficients of opposite sign.
Journal
The European physical journal. E, Soft matter
ISSN: 1292-895X
Titre abrégé: Eur Phys J E Soft Matter
Pays: France
ID NLM: 101126530
Informations de publication
Date de publication:
28 May 2022
28 May 2022
Historique:
received:
02
03
2022
accepted:
27
04
2022
entrez:
28
5
2022
pubmed:
29
5
2022
medline:
1
6
2022
Statut:
epublish
Résumé
We performed ground-based experiments on the sample polystyrene-toluene-cyclohexane in order to complement the experimental activities in microgravity conditions related to the ESA projects DCMIX4 and Giant Fluctuations. After applying a stabilizing thermal gradient by heating from above a layer of the fluid mixture, we studied over many hours the density variations in the bidimensional horizontal field by means of a Shadowgraph optical setup. The resulting images evidence the appearance of convective instability after a diffusive time associated with the binary molecular solvent consisting of toluene and cyclohexane, confirming the negative sign of the Soret coefficient of this mixture. After a larger diffusive time related to mass diffusion of the polystyrene in the binary solvent, convection was suppressed by the increasing stabilizing density gradient originated by the Soret-induced concentration gradient of the polymer. This is compatible with a positive sign of the Soret coefficient of the polymer in the binary solvent.
Identifiants
pubmed: 35633426
doi: 10.1140/epje/s10189-022-00202-5
pii: 10.1140/epje/s10189-022-00202-5
pmc: PMC9148296
doi:
Substances chimiques
Cyclohexanes
0
Polymers
0
Polystyrenes
0
Solvents
0
Toluene
3FPU23BG52
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
52Subventions
Organisme : Agence Nationale de la Recherche
ID : ANR16IDEX0002
Organisme : European Space Agency (ESA)
ID : 4000128933/19/NL/PG
Organisme : Comunidad de Madrid
ID : 2019- T2/AMB-15912
Informations de copyright
© 2022. The Author(s).
Références
Phys Rev Lett. 2002 May 6;88(18):185901
pubmed: 12005700
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Jul;80(1 Pt 2):015303
pubmed: 19658761
J Chem Phys. 2020 Oct 14;153(14):144201
pubmed: 33086818
Eur Phys J E Soft Matter. 2017 Mar;40(3):35
pubmed: 28352991
J Chem Phys. 2015 Dec 14;143(22):224902
pubmed: 26671399
Eur Phys J E Soft Matter. 2019 Sep 12;42(9):124
pubmed: 31511999
Eur Phys J E Soft Matter. 2014 Nov;37(11):107
pubmed: 25403832
Eur Phys J E Soft Matter. 2022 Apr 26;45(4):40
pubmed: 35471468
Eur Phys J E Soft Matter. 2016 Dec;39(12):125
pubmed: 27987100
Eur Phys J E Soft Matter. 2019 Jul 11;42(7):87
pubmed: 31290028
Phys Rev Lett. 2013 Jul 5;111(1):014502
pubmed: 23863004
Eur Phys J E Soft Matter. 2016 Dec;39(12):119
pubmed: 28012143
Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Jan;81(1 Pt 2):016309
pubmed: 20365462
Phys Rev Lett. 2008 May 9;100(18):188104
pubmed: 18518419
J Chem Phys. 2012 Dec 21;137(23):234202
pubmed: 23267479
Appl Opt. 2011 Jul 10;50(20):3419-27
pubmed: 21743548
Phys Rev E. 2019 Jan;99(1-1):012602
pubmed: 30780374
Eur Phys J E Soft Matter. 2016 Dec;39(12):120
pubmed: 28012142
J Phys Chem B. 2016 Jan 28;120(3):535-48
pubmed: 26700401
Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Apr;73(4 Pt 2):047302
pubmed: 16711959
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Apr;67(4 Pt 2):046302
pubmed: 12786482
Eur Phys J E Soft Matter. 2019 Jul 11;42(7):86
pubmed: 31289962