The Role of Solid Friction in the Sedimentation of Strongly Attractive Colloidal Gels

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dc.creatorCondre, Jean-Michel
dc.creatorLigoure, Christian
dc.creatorCipelletti, Luca
dc.date2006-10-05
dc.date.accessioned2026-07-07T07:48:36Z
dc.date.available2026-07-07T07:48:36Z
dc.descriptionWe study experimentally and theoretically the sedimentation of gels made of strongly aggregated colloidal particles, focussing on the long time behavior, when mechanical equilibrium is asymptotically reached. The asymptotic gel height is found to vary linearly with the initial height, a finding in stark contrast with a recent study on similar gels [Manley \textit{et al.} 2005 \textit{Phys. Rev. Lett.} \textbf{94} 218302]. We show that the asymptotic compaction results from the balance between gravity pull, network elasticity, and solid friction between the gel and the container walls. Based on these ingredients, we propose a simple model to account for the dependence of the height loss on the initial height and volume fraction. As a result of our analysis, we show that the static friction coefficient between the gel and the container walls strongly depends on volume fraction: the higher the volume fraction, the weaker the solid friction. This nonintuitive behavior is explained using simple scaling arguments.
dc.description13 pages, 5 figures. Submitted to JSTAT
dc.identifierhttps://arxiv.org/abs/cond-mat/0610148
dc.identifierhttp://arxiv.org/abs/cond-mat/0610148
dc.identifierJournal of Statistical Mechanics: Theory and Experiment (2007-02-09) P02010
dc.identifierdoi:10.1088/1742-5468/2007/02/P02010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124558
dc.subjectSoft Condensed Matter
dc.titleThe Role of Solid Friction in the Sedimentation of Strongly Attractive Colloidal Gels
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