Low density fragile states in cohesive powders

Paul B. Umbanhowar*, Daniel I. Goldman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We discuss the difference between cohesive and non-cohesive granular media in the context of dry quicksand, recently proposed as a new fragile state of sand. We demonstrate that weak low density configurations with properties like dry quicksand are readily formed in many common household powders. In contrast, such states cannot be formed in non-cohesive granular media such as ordinary sand.

Original languageEnglish (US)
Pages (from-to)720-721
Number of pages2
JournalAmerican Journal of Physics
Issue number8
StatePublished - Aug 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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