Gravitational collapse of colloidal gels.

We 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)<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.

• Publication year

  2005

• Venue

  Physical Review Letters

• Publication date

  2005-06-03

• Fields of study

  Physics, Medicine, Materials Science, Chemistry

• Identifiers
  DOI 10.1103/PHYSREVLETT.94.218302PMID 16090356
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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