Authors: Alireza Abbasi a,b, Mohammad Ashraful Islam a, Paul E. Ege b, and Hugo I. de Lasa a
a Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, ON, Canada
b Reactech Process Development Inc., Markham, ON, Canada
Source: Abbasi, A.; Islam, M. A.; Ege, P. E.; de Lasa, H. I. Downer Reactor Flow Measurements Using CREC-GS-Optiprobes. Powder Technology 2012, 224, 1–11.
Abstract: The present study describes the potential intrusive effects of CREC-GS-Optiprobes on the flow pattern in gas–solid downflow units. Granular flows and their interactions with the CREC-GS-Optiprobes are calculated using a CPFD (Computational Particle Fluid Dynamic) numerical scheme in three dimensions, using particle clusters. Once particles dispersed in the column, the numerical simulations revealed that these particles formed a relatively homogeneous suspension with cluster formation and solids accelerating until reaching a fully-developed regime. CPFD simulations showed that two axially aligned CREC-GS-Optiprobes, when placed in the fully developed flow regime, introduce minimum perturbations in the gas–solid suspension. Therefore this CREC-GS-Optiprobe creates a highly illuminated focal region where hydrodynamic parameters can be measured without significant flow disturbance. Thus, this study supports the application of fiber optic probes; such as in the case of the CREC-GS-Optiprobes, which can provide undisturbed axial particle cluster velocity, axial cluster slip velocities, cluster size and solid fraction measurements at strategically selected locations in the gas–solid downer unit.
CPFD and staff have distribution rights for some publications. Contact us with any questions.