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Size Segregation in Granular Beds Subject to Discrete and Continuous Vertical Oscillations

Published online by Cambridge University Press:  01 February 2011

Dimuth N. Fernando  and
Carl R. Wassgren
Dimuth N. Fernando
Affiliation:
School of Mechanical Engineering Purdue University West Lafayette, IN 47907–1288, U.S.A.
Carl R. Wassgren
Affiliation:
School of Mechanical Engineering Purdue University West Lafayette, IN 47907–1288, U.S.A.
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Abstract

Size segregation of particulates is of concern in a number of industries that handle materials such as chemicals, pharmaceuticals, fertilizers, and food products. Of particular interest in this paper is segregation resulting from externally applied vibration. In industrial applications this vibration may either be applied intentionally in devices such as vibrating conveyors or “live wall” hoppers, or unintentionally during material handling and transport. This paper investigates size segregation in granular beds subject to discrete “taps” and continuous, sinusoidal vertical vibration. The results from discrete element computer simulations indicate that the rise rate of a single impurity increases monotonically with amplitude for discrete vibrations but for continuous vibrations the rise rate increases, reaches a maximum value, then decreases as the oscillation amplitude increases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 627: Symposium BB – The Granular State , 2000 , BB5.3
Copyright
Copyright © Materials Research Society 2000

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References

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