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Optical Engineering

Holography Of Settling Particles: Shape Parameters
Author(s): Kendall L. Carder; Dennis J. Meyers
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Paper Abstract

The effect of shape on the fall velocity of silt-size mineral particles was investigated by recording sequential transmission holograms of settling particles. Particles with similar densities and settling speeds varied in their sphere-equivalent radii by a factor of 5. The large particles were edgewise-settling thin flakes while the smaller particles were much more compact. Variations of the Stokes' settling equation for thin disks accurately described the settling data for large thin flakes. The fall velocities for small, compact, fast-settling particles were much greater than for volume-equivalent spheres and were adequately described by the Stoke's equation for elliptical cylinders. An unresolved problem remains in that the theoretical drag on thin disks is about four times that on flat elliptical cylinders of the same surface area.

Paper Details

Date Published: 1 October 1980
PDF: 5 pages
Opt. Eng. 19(5) 195734 doi: 10.1117/12.7972596
Published in: Optical Engineering Volume 19, Issue 5
Show Author Affiliations
Kendall L. Carder, University of South Florida (United States)
Dennis J. Meyers, University of South Florida (United States)

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