naa a22 4500 51082062X CHVBK 20180411083529.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s11814-012-0216-8 doi (NATIONALLICENCE)springer-10.1007/s11814-012-0216-8 Comparisons of particle cluster diameter and concentration in circulating fluidized bed riser and downer using computational fluid dynamics simulation [Elektronische Daten] [Benjapon Chalermsinsuwan, Dimitri Gidaspow, Pornpote Piumsomboon] The information of particle cluster dynamics is necessary for improving the performance of a circulating fluidized bed system. The main objective of this study is to compare the particle cluster diameters and concentrations from computational fluid dynamics simulation results between circulating fluidized bed riser and downer. The calculation methodologies are based on the concept of kinetic theory of granular flow and statistics. The mathematical model was verified by using the experimental dataset from literature and used for computing the particle cluster dynamics. In the circulating fluidized bed riser and downer, a dense and dilute core-annulus flow structures were obtained, respectively. The particle cluster in the circulating fluidized bed riser possessed more heterogeneity movements than that in the circulating fluidized bed downer. This can be explained by the system flow direction. About the particle cluster dynamics, the particle cluster diameters and concentrations in the circulating fluidized bed riser were higher than the ones in the downer. The calculated values were comparable to the empirical correlations. This confirms the validity of the calculation methodologies. Particle cluster dynamics and its example application inside circulating fluidized bed riser and downer were also discussed. Korean Institute of Chemical Engineers, Seoul, Korea, 2012 Circulating Fluidized Bed nationallicence Computational Fluid Dynamics nationallicence Downer j]Particle Cluster nationallicence Riser nationallicence Simulation nationallicence Chalermsinsuwan Benjapon Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Patumwan, 10330, Bangkok, Thailand aut Gidaspow Dimitri Department of Chemical and Biological Engineering, Illinois Institute of Technology, 60616, Chicago, IL, USA aut Piumsomboon Pornpote Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Patumwan, 10330, Bangkok, Thailand aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/4(2013-04-01), 963-975 0256-1115 30:4<963 2013 30 11814 https://doi.org/10.1007/s11814-012-0216-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-012-0216-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chalermsinsuwan Benjapon Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Patumwan, 10330, Bangkok, Thailand aut NATIONALLICENCE 700 1- Gidaspow Dimitri Department of Chemical and Biological Engineering, Illinois Institute of Technology, 60616, Chicago, IL, USA aut NATIONALLICENCE 700 1- Piumsomboon Pornpote Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Patumwan, 10330, Bangkok, Thailand aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/4(2013-04-01), 963-975 0256-1115 30:4<963 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer