The effect of the number of impeller blades on granular flow in a bladed mixer
作者： Veerakiet Boonkanokwong , Brenda Remy , Johannes G. Khinast , Benjamin J. Glasser
DOI: 10.1016/J.POWTEC.2016.08.064
关键词: Scaling 、 Electronic engineering 、 SCALE-UP 、 Impeller 、 Contact force 、 Dispersity 、 Particle diameter 、 Dilation (morphology) 、 Mechanics 、 Discrete element method 、 Materials science
摘要: Abstract Simulations of granular flow monodisperse, cohesionless spherical glass beads in a cylindrical bladed mixer agitated by an impeller were performed using the discrete element method (DEM). The number blades was varied from 1 to 4 blades, and impact on mixing kinetics investigated. It found that particle velocities influenced used system. Higher radial vertical particles observed 1- 2-bladed mixers, which led more pronounced three-dimensional recirculation patterns. However, tangential velocity components 3- 4-bladed cases larger. Additionally, it two or three provided better performance than one four as evaluated calculation relative standard deviation (RSD) Lacey index systems. Granular temperature diffusivities obtained for 2- 3-bladed also higher those mixers. Solids fraction analysis showed dilation bed occurred greatest extent mixer. Contact force network data blade-particle calculations different numbers significant differences distribution. Finally, effect scaling up varying diameter ratio. Increasing ratio have little behaviors.
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