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Roche et al. 2002
Roche, O., Gilbertson, M., Phillips, J.C. and Sparks, R.S.J. (2002). Experiments on deaerating granular flows and implications for pyroclastic flow mobility. Geophysical Research Letters 29: doi: 10.1029/2002GL014819. issn: 0094-8276.

Granular flows were generated by the release of beds of particles in various fluidized states, which then deaerated in a horizontal channel. We describe characteristics of the flows and their deposits. Morphological similarities between deposits in experiments and in the field suggest that pyroclastic flow deposits form from a fluidized mixture. The experiments show that slightly expanded, fluidized flows are more mobile than non-fluidized flows of equivalent volume and material composition. They travel to a fixed distance from their source, which depends only weakly on their initial degree of fluidization. Flows of fine particles (<100 ¿m) deaerate slowly and are highly mobile. Pyroclastic flows commonly have large amounts of fine ash, which may have a controlling influence on their high mobility.

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Abstract

Keywords
Volcanology, Eruption mechanisms, Volcanology, General or miscellaneous
Journal
Geophysical Research Letters
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Publisher
American Geophysical Union
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