Motility-induced shear thickening in dense colloidal suspensions

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buir.contributor.authorBayram, A. Gülce
buir.contributor.authorBiancofiore, Luca
buir.contributor.orcidBayram, A. Gülce|0000-0002-9053-0528
buir.contributor.orcidBiancofiore, Luca|0000-0001-7159-7965
dc.citation.epage4578en_US
dc.citation.issueNumber24
dc.citation.spage4571
dc.citation.volumeNumber19
dc.contributor.authorBayram, A. Gülce
dc.contributor.authorSchwarzendahl, F. J.
dc.contributor.authorLöwen, H.
dc.contributor.authorBiancofiore, Luca
dc.date.accessioned2024-03-11T08:35:17Z
dc.date.available2024-03-11T08:35:17Z
dc.date.issued2023-06-07
dc.departmentDepartment of Mechanical Engineering
dc.description.abstractPhase transitions and collective dynamics of active colloidal suspensions are fascinating topics in soft matter physics, particularly for out-of-equilibrium systems, which can lead to rich rheological behaviours in the presence of steady shear flow. Here the role of self-propulsion in the rheological response of a dense colloidal suspension is investigated by using particle-resolved Brownian dynamics simulations. First, the combined effect of activity and shear in the solid on the disordering transition of the suspension is analyzed. While both self-propulsion and shear destroy order and melt the system if critical values are exceeded, self-propulsion largely lowers the stress barrier needed to be overcome during the transition. We further explore the rheological response of the active sheared system once a steady state is reached. While passive suspensions show a solid-like behaviour, turning on particle motility fluidises the system. At low self-propulsion, the active suspension behaves in the steady state as a shear-thinning fluid. Increasing the self-propulsion changes the behaviour of the liquid from shear-thinning to shear-thickening. We attribute this to clustering in the sheared suspensions induced by motility. This new phenomenon of motility-induced shear thickening (MIST) can be used to tailor the rheological response of colloidal suspensions.
dc.description.provenanceMade available in DSpace on 2024-03-11T08:35:17Z (GMT). No. of bitstreams: 1 Motility-induced_shear_thickening_in_dense_colloidal_suspensions.pdf: 1803995 bytes, checksum: c366d2e0c255dc038a69c4482a54d98c (MD5) Previous issue date: 2023-06-07en
dc.identifier.doi10.1039/d3sm00035d
dc.identifier.eissn1744-6848
dc.identifier.urihttps://hdl.handle.net/11693/114485
dc.language.isoen
dc.publisherThe Royal Society of Chemistry
dc.relation.isversionofhttps://doi.org/10.1039/d3sm00035d
dc.rights.licenseCC BY
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.source.titleSoft Matter
dc.titleMotility-induced shear thickening in dense colloidal suspensions
dc.typeArticle

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