The Structure of Geldart A Gas-Fluidized Beds
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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.
KeywordsLinear Stability Analysis Hydrodynamic Interaction Granular Temperature Interparticle Force Tensile Yield Stress
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