par Rios, Gilbert Marcel;Dang Tran, Ky T. 
;Masson, Henri
Référence Chemical engineering communications, 47, 4-6, page (247-272)
Publication Publié, 1986-10
;Masson, Henri Référence Chemical engineering communications, 47, 4-6, page (247-272)
Publication Publié, 1986-10
Article révisé par les pairs
| Résumé : | The presence probability, the characteristic motions and the velocity of various “light” objects freely immersed in a gas fluidized bed of “heavy” fine particles have been investigated as a function of superficial fluid velocity, powder characteristics and bed height. The displacement of objects through the bed has been shown to result from both a “deterministic” dynamic force equilibrium and a “stochastic” stirring effect due to bubbles. A specific gas velocity exists at which a deep change in mixing occurs: above it the stirring effect is fairly noticeable, while below it pseudo-hydrostatic effects prevail. A method has been proposed to estimate this characteristic value. © 1986, Taylor & Francis Group, LLC. All rights reserved. |
