Experiments and simulations of cohesionless particles with varying roughness in a bladed mixer
作者： Brenda Remy , Thomas M. Canty , Johannes G. Khinast , Benjamin J. Glasser
DOI: 10.1016/J.CES.2010.04.034
关键词:
摘要: Abstract The kinematics of granular flow cohesionless particles in a bladed mixer was studied experimentally using particle image velocimetry and computationally the discrete element method. simulations were able to reproduce surface velocities, temperature profiles, mixing kinetics observed experimentally. Procedures for roughening glass bead surfaces via coating developed effect roughness computationally. Increasing led development less uniform flows inside increased dilation bed. Systems composed rougher experienced radial vertical velocities as well higher diffusivities. Cylinder wall also shown significantly influence mixers. Rough cylinder walls more pronounced velocity fluctuations near top an increase temperature. increasing blade speed studied. Two distinct regimes increased. At low rotational speed, occurs bumping regime where are linearly proportional tip blades. In this regime, blades provides time scale momentum transfer process. roping is encountered no longer This characterized by enhanced faster kinetics.
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