Size segregation of binary granular materials in vertical channel flows

Citation

Beatty, Susan M. (1993) Size segregation of binary granular materials in vertical channel flows. Engineer's thesis, California Institute of Technology. doi:10.7907/cnvy-9k28. https://resolver.caltech.edu/CaltechTHESIS:04112011-111322619

Abstract

This experimental research investigates transverse particle segregation in a binary mixture of spherical particles in air. in a gravity driven. vertical channel flow. Glass beads with similar properties, except for size and color, are randomly mixed in an upper hopper at the entrance of a vertical channel. When roughened channel walls are employed. particles show segregation by size, with a preferred position of larger particles at the centerline and approximately 80% of the distance between the centerline and the side walls. The concentration of the particles is found based on grey-scale color distribution as recorded by an image processing system. The effects of variations in flow rate. wall surface conditions, mixture ratios and channel width on segregation are studied as a function of downstream distance.

Thesis Files