Craters Formed in Granular Beds by Impinging Jets of Gas

Details Craters Formed in Granular Beds by Impinging Jets of Gas Craters Formed in Granular Beds by Impinging Jets of Gas

2009-05-29

arxiv.org/abs/0905.4851v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages; Powders and Grains 2009, Golden, Colorado, USA

Scientific paper

When a jet of gas impinges vertically on a granular bed and forms a crater, the grains may be moved by several different mechanisms: viscous erosion, diffused gas eruption, bearing capacity failure, and/or diffusion-driven shearing. The relative importance of these mechanisms depends upon the flow regime of the gas, the mechanical state of the granular material, and other physical parameters. Here we report research in two specific regimes: viscous erosion forming scour holes as a function of particle size and gravity; and bearing capacity failure forming deep transient craters as a function of soil compaction.

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