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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Particle Roundness and Surface Texture Effects on Fall Velocity: NOTES
Garnett P. Williams
ABSTRACT
Fall velocity measurements using geometrical objects were conducted in water in order to determine any changes in rate of fall due to a) particle roundness and b) particle surface texture. The general Reynolds number range of the experiments was 230<Re<26,000. The possession of sharp edges was found to reduce the fall velocity by 8-28 percent of the rate of fall of well-rounded discs and cylinders, if all other particle properties were held constant. The types of surface texture examined caused only a minor reduction in the fall velocities of discs and spheres.
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