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- Title
Aeolian saltation threshold: the effect of density ratio.
- Authors
Iversen, James D.; Greeley, Ronald; Marshall, John R.; Pollack, James B.
- Abstract
Saltation threshold data from three wind tunnels and from hydraulic flumes are presented to show that the dimensionless threshold friction speed for small particles is a continuous function of particle-to-fluid-density ratio. In addition, the dimensionless threshold speed is a function of the grain-friction Reynolds number and an interparticle force term. The variation with density ratio seems to be due to the relative energy with which particles impact other particles to initiate saltation.
- Subjects
HYDRAULIC fluids; WATER power; FLUMES; FRICTION; DENSITY currents; PROPERTIES of matter
- Publication
Sedimentology, 1987, Vol 34, Issue 4, p699
- ISSN
0037-0746
- Publication type
Article
- DOI
10.1111/j.1365-3091.1987.tb00795.x