TY - JOUR
T1 - CFD-DEM investigation of particle breakage in spout-fluidized beds
AU - Ghods, Nazanin
AU - Golshan, Shahab
AU - Zarghami, Reza
AU - Sotudeh-Gharebagh, Rahmat
AU - Mostoufi, Navid
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2024/1/2
Y1 - 2024/1/2
N2 - In a fluidized bed, particles undergo mechanical stress resulting from collisions with other particles, the bed walls, or internal equipment. Particle breakage exerts a significant impact on the hydrodynamics and overall performance of the fluidized bed by modifying the particle size distribution. This study explores this phenomenon through the application of an enhanced computational fluid dynamics-discrete element method (CFD-DEM) coupled with a particle breakage model in three distinct flow regimes: spouted bed, jet-in-fluidized bed, and spouting-with-aeration bed. The simulations revealed various aspects related to particle breakage, encompassing the spatial and temporal distribution of particle sizes, the location of breakages, breakage rates, solid particle fraction, and the height of the bed. The findings establish a pronounced correlation between the breakage rate and the velocity of the jet, with the spouting-with-aeration bed displaying the highest level of particle breakage. Furthermore, it is noteworthy that nearly 98% of the breakages occur within the distributor zone.
AB - In a fluidized bed, particles undergo mechanical stress resulting from collisions with other particles, the bed walls, or internal equipment. Particle breakage exerts a significant impact on the hydrodynamics and overall performance of the fluidized bed by modifying the particle size distribution. This study explores this phenomenon through the application of an enhanced computational fluid dynamics-discrete element method (CFD-DEM) coupled with a particle breakage model in three distinct flow regimes: spouted bed, jet-in-fluidized bed, and spouting-with-aeration bed. The simulations revealed various aspects related to particle breakage, encompassing the spatial and temporal distribution of particle sizes, the location of breakages, breakage rates, solid particle fraction, and the height of the bed. The findings establish a pronounced correlation between the breakage rate and the velocity of the jet, with the spouting-with-aeration bed displaying the highest level of particle breakage. Furthermore, it is noteworthy that nearly 98% of the breakages occur within the distributor zone.
KW - CFD-DEM
KW - Elutriation
KW - Fluidization
KW - Particles breakage
UR - http://www.scopus.com/inward/record.url?scp=85177617775&partnerID=8YFLogxK
U2 - 10.1016/j.powtec.2023.119137
DO - 10.1016/j.powtec.2023.119137
M3 - Article
AN - SCOPUS:85177617775
SN - 0032-5910
VL - 432
JO - Powder Technology
JF - Powder Technology
M1 - 119137
ER -