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Effect of particle size and interparticle force on the fluidization behavior of gas-fluidized beds

 

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Opened Access Effect of particle size and interparticle force on the fluidization behavior of gas-fluidized beds
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Author: Valverde Millán, José Manuel
Castellanos Mata, Antonio
Mills, Pierre
Sánchez Quintanilla, Miguel Angel
Department: Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo
Date: 2003
Published in: Physical review E. Statistical, nonlinear, and soft matter physics, 67, 5, 051305-1-051305-6
Document type: Article
Abstract: Gas-fluidized powders of fine particles display a fluidlike regime in which the bed does not have a yield strength, it expands uniformly as the gas velocity is increased and macroscopic bubbles are absent. In this paper we test the extension of this fluidlike regime as a function of particle size and interparticle attractive force. Our results show that for sufficiently large particles, bubbling initiates just after the solidlike fluidized regime as it is obtained experimentally by other workers. A scaling behavior of the solid-phase pressure in the fluidlike regime and a predictive criterion for the onset of macroscopic bubbling are analyzed in the light of these results.
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URI: http://hdl.handle.net/11441/26914

DOI: 10.1103/PhysRevE.67.051305

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