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Proceedings Paper

New Optical Techniques For Particle Studies In The Bottom Boundary Layer
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 Stokes 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: 26 March 1980
PDF: 8 pages
Proc. SPIE 0208, Ocean Optics VI, (26 March 1980); doi: 10.1117/12.958271
Show Author Affiliations
Kendall L. Carder, University of South Florida (United States)
Dennis J. Meyers, University of South Florida (United States)

Published in SPIE Proceedings Vol. 0208:
Ocean Optics VI
Seibert Quimby Duntley, Editor(s)

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