Settling velocity of natural particles

@article{Dietrich1982SettlingVO,
  title={Settling velocity of natural particles},
  author={W. Dietrich},
  journal={Water Resources Research},
  year={1982},
  volume={18},
  pages={1615-1626}
}
  • W. Dietrich
  • Published 1982
  • Geology
  • Water Resources Research
Data from 14 previous experimental studies were used to develop an empirical equation that accounts for the effects of size, density, shape, and roundness on the settling velocity of natural sediment. This analysis was done in terms of four nondimensional parameters, namely, the dimensionless nominal diameter D*, the dimensionless settling velocity W*, the Corey shape factor, and the Powers roundness index. For high D* (large or dense particles), changes in roundness and shape factor have… Expand
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The departure of a grain from a spherical shape causes a decrease in its settling velocity within a fluid. The more non-spherical the particle the greater the departure from the settling velocity ofExpand
Settling Velocities of Irregular Grains at Low Reynolds Numbers
ABSTRACT Settling rates of irregular glass particles were measured in a settling tube containing glycerine, yielding Reynolds numbers equivalent to silt to very fine sand quartz grains settling inExpand
Measurements and analysis of setting velocities of natural quartz sand grains
ABSTRACT Settling velocities in water were measured for natural quartz sand grains in the sieve-size range -0.75 to 1.50 (0.35-1.68 mm). Obtained from beach sand samples, the grains were selected soExpand
Effects of particle shape on settling velocity at low Reynolds numbers
Extensive theoretical and experimental studies have been conducted at the Iowa Institute of Hydraulic Research in an investigation of the effect of shape on the settling velocity of particles. AExpand
The Hydraulic Shape of Sand Particles
ABSTRACT The shapes of sand particles that affect their hydraulic properties in a moving fluid during entrainement, transport and deposition are closely approximated by their dynamic shape factorExpand
The Relationship Between Sphere Size And Settling Velocity
The settling velocities in water of 216 glass spheres ranging in size from 50mu to 5000mu in diameter were determined. The size, density, and shape of these spheres were accurately known. All timingExpand
Effect of shape upon the settling vellocity of regular convex geometric particles
ABSTRACT H, a measure of the effect of shape upon the settling velocity of a regular rigid convex particle, is synthesized here from two geometric components, a "form" component and a "surface area"Expand
FALL VELOCITY OF IRREGULAR SHAPED PARTICLES
The determination of the free-fall velocity of irregularly shaped particles in viscous fluids is presented. A shape parameter is proposed which correlates Reynolds number with drag coefficient toExpand
Particle roundness and surface texture effects on fall velocity
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.Expand
Measurement and geological significance of shape and roundness of sedimentary particles
ABSTRACT Methods are described for the rapid measurement of shape and roundness of large sedimentary particles. Shape is determined from the long, intermediate, and short diameters of the particles,Expand
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