Theoretical criteria defining the transition from bubble free to ordinarily bubbling beds have been examined on the basis of results of a number of experimental studies reported in the literature. It is suggested that the various theoretical approaches may be compared by considering the values of elastic modulus of the dispersed phase determined using each approach. Theoretical approaches based solely on gas-particle interactions do not generally agree with the experimental results. Further studies on the structure of constitutive equations of elastic moduli, and their validation by means of critical experiments are required to evaluate possible effects of particle to particle cohesive forces on bubble free gas fluidization.
Stability Analysis of Uniformly Fluidized-beds In Terms of the Elastic-modulus of the Dispersed Phase
POLETTO, Massimo;
1992-01-01
Abstract
Theoretical criteria defining the transition from bubble free to ordinarily bubbling beds have been examined on the basis of results of a number of experimental studies reported in the literature. It is suggested that the various theoretical approaches may be compared by considering the values of elastic modulus of the dispersed phase determined using each approach. Theoretical approaches based solely on gas-particle interactions do not generally agree with the experimental results. Further studies on the structure of constitutive equations of elastic moduli, and their validation by means of critical experiments are required to evaluate possible effects of particle to particle cohesive forces on bubble free gas fluidization.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.