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Particle pressures in gas-fluidized beds

Published online by Cambridge University Press:  26 April 2006

Charles S. Campbell  and
David G. Wang
Charles S. Campbell
Affiliation:
Department of Mechanical Engineering, University of Southern California, Los Angeles, CA 90089-1453, USA
David G. Wang
Affiliation:
Department of Mechanical Engineering, University of Southern California, Los Angeles, CA 90089-1453, USA
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Abstract

The particle pressure is the surface force that is exerted due to the motion of particles and their interactions. This paper describes measurements of the particle pressure exerted on the sidewall of a gas-fluidized bed. As long as the bed remains in a packed state, the particle pressure decreases with increasing gas velocity as progressively more of the bed is supported by fluid forces. It appropriately reaches a minimum fluidization and then begins to rise again when the bed is fluidized, reflecting the agitation of the bed by bubbles. In this fully fluidized region, the particle pressure scales with the particle density and the bubble size.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 227 , June 1991 , pp. 495 - 508
Copyright
© 1991 Cambridge University Press

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