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Fluidisation de mélanges de fibres courtes et de poudres en proportion variables : Étude hydrodynamique
AUDREN-PAUL, Matthias
Ecole nationale supérieure des ingénieurs en arts chimiques et technologiques [ENSIACET]
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Ecole nationale supérieure des ingénieurs en arts chimiques et technologiques [ENSIACET]
AUDREN-PAUL, Matthias
Ecole nationale supérieure des ingénieurs en arts chimiques et technologiques [ENSIACET]
< Reduce
Ecole nationale supérieure des ingénieurs en arts chimiques et technologiques [ENSIACET]
Language
EN
Article de revue
This item was published in
Chemical Engineering Journal. 2023-09-01, vol. 471, p. 144846
English Abstract
The behavior of a particle mixture composed of short fibers and silicon carbide powder in variable proportions has been experimentally investigated. The study shows that the hydrodynamic behavior of a bed initially composed ...Read more >
The behavior of a particle mixture composed of short fibers and silicon carbide powder in variable proportions has been experimentally investigated. The study shows that the hydrodynamic behavior of a bed initially composed of powder is affected as soon as a few percent of short fibers are added. The minimum fluidization velocity (Umf) is globally lowered and the intrinsic properties of the porous medium (equivalent particle diameter, porosity, flow coefficients…) are altered. Several hydrodynamic equations describing Umf as a function of the pressure are considered and the intrinsic properties of the bed such as the hydraulic diameter or the Darcy and Knudsen coefficients are fitted. The Darcy-Klinkenberg equation on one hand and a semi-empirical correlation based on Ergün’s equation on the other hand, are both adapted to describe the Umf behavior as a function of a limited number of initial parameters. The semi-empirical correlation leads to the best Umf prediction, with an absolute error of less than 10%, using only the temperature, pressure and percentage of fibers in the mixture as input parameters.Read less <
English Keywords
Fluidized bed
Minimum fluidization velocity
Hydrodynamic
Particle mixture
Short fibers