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An experimental study on the role of inter-particle friction in the shear-thinning behavior of non-Brownian suspensions

hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorARSHAD, Muhammad
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorMAALI, Abdelhamid
hal.structure.identifierInstitut de Physique de Nice [INPHYNI]
dc.contributor.authorCLAUDET, Cyrille
hal.structure.identifierInstitut de Physique de Nice [INPHYNI]
dc.contributor.authorLOBRY, Laurent
hal.structure.identifierInstitut de Physique de Nice [INPHYNI]
dc.contributor.authorPETERS, Francois
hal.structure.identifierInstitut de Physique de Nice [INPHYNI]
dc.contributor.authorLEMAIRE, Elisabeth
dc.date.issued2021-06-30
dc.identifier.issn1744-683X
dc.description.abstractEnThis paper focuses on shear-thinning in non-Brownian suspensions. In particular, it proposes a quantitative experimental validation of the model proposed by Lobry et al. [J. Fluid Mech., 2019, 860, 682-710] that links viscosity to microscopic friction between particles and, in particular, shear-thinning to load-dependent friction coefficient. To this aim, Atomic Force Microscopy (AFM) is used to measure the pairwise friction coefficient of polystyrene particles (40 μm in diameter), immersed in a Newtonian liquid, for different normal loads ranging from 10 to 1000 nN. It is shown that the inter-particle friction coefficient decreases with the load, contrarily to what is expected for macroscopic contacting bodies. The experimental friction law is then introduced into the viscosity model proposed by Lobry et al. and the results are compared to the viscosity of suspensions madeof the same particles dispersed in the same liquid as those used for AFM measurements. The very good agreement between the measured viscosity values and those predicted by the model of Lobry et al. with the friction coefficient measured by AFM as input data shows the relevance of the scenario proposed by Lobry et al. and highlights the close links between the microscopic friction properties of the particles and the macroscopic rheological behavior of suspensions.
dc.description.sponsorshipApproche multidisciplinaire pour la construction d'un outil prédictif en rhéologie des suspensions non-Browniennes - ANR-18-CE06-0009
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enAn experimental study on the role of inter-particle friction in the shear-thinning behavior of non-Brownian suspensions
dc.typeArticle de revue
dc.identifier.doi10.1039/D1SM00254F
dc.subject.halSciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des fluides [physics.class-ph]
bordeaux.journalSoft Matter
bordeaux.page6088-6097
bordeaux.volume17
bordeaux.issue25
bordeaux.peerReviewedoui
hal.identifierhal-03347347
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03347347v1
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