The Structure of Geldart A Gas-Fluidized Beds

Part of the Particle Technology Series book series (POTS, volume 18)


The question of the structure of stably fluidized beds of Geldart A powders has been a subject of controversy for many years. Although some works have suggested the fluid-like nature of this stable state, most empirical observations and numerical analysis have indicated otherwise. According to these studies, a gas-fluidized bed can only be stabilized in a nonbubbling regime by interparticle attractive forces. These interparticle forces would hold particles together at permanent positions, conferring on the expanded fluidized bed a solid-like structure whose weight is sustained by not only the gas flow but also in part by enduring interparticle contacts.


Linear Stability Analysis Hydrodynamic Interaction Granular Temperature Interparticle Force Tensile Yield Stress 
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© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Faculty of PhysicsUniversity of SevillaSevillaSpain

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