Gravitational Collapse of Colloidal Gels
Skotheim, J. M.
Weitz, D. A.
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CitationManley, S., J. M. Skotheim, L. Mahadevan, and D. A. Weitz. 2005. “Gravitational Collapse of Colloidal Gels.” Physical Review Letters 94 (21). https://doi.org/10.1103/physrevlett.94.218302.
AbstractWe present a unified framework for understanding the compaction of colloidal gels under their own weight. The dynamics of the collapse are determined by the value of the gravitational stress &sigma;(g), as compared to the yield stress &sigma;(Y) of the network. For &sigma;(g)&LT;&sigma;(Y), gels collapse poroelastically, and their rate of compression decays exponentially in time. For &sigma;(g)>&sigma;(Y), the network eventually yields, leading to rapid settling. In both cases, the rate of collapse is backflow limited, while its overall magnitude is determined by a balance between gravitational stress and network elastic stress.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41417294
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