Experimental study of gas-fluidized granular flows with implications for pyroclastic flow emplacement

Research output: Contribution to journalArticle (Academic Journal)peer-review

49 Citations (Scopus)

Abstract

Experiments have been carried out on initially gas-aerated and gas-fluidized granular flows propagating into a horizontal channel. After lateral acceleration following release of the originally fluidized bed, two contrasting flow behaviors were observed, which reflected the degree of initial fluidization and the grain size. Initial fluidization disrupts the interparticle contact network, which controls internal friction of the static bed. The flow regime then depends on the timescale needed to reestablish a strong contact network, and this time increases as the grain size decreases. Initially aerated and fluidized flows of coarse particles (>100 mm) and initially aerated flows of fine particles (
Translated title of the contributionExperimental study of gas-fluidized granular flows with implications for pyroclastic flow emplacement
Original languageEnglish
Pages (from-to)1 - 14
Number of pages14
JournalJournal of Geophysical Research: Solid Earth
Volume109 (B10201)
DOIs
Publication statusPublished - Oct 2004

Bibliographical note

Publisher: American Geophysical Union

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