Secondary Motion of Non-Spherical Particles in Gas Solid Flows

Objective of this study is to investigate the effect secondary motion particles in multiphase gas-solid flows parametrically and test relative impacts particle shape orientation information on distribution. For that purpose, predictive accuracies simplified drag coefficient models are assessed for conditions relevant a wood recovery plant operating at dilute flow regime. After demonstrating strong impact force balance single particles, we compared steady state Eulerian-Lagrangian simulation results volume fractions, residence times diameter distributions within chamber different (i) superficial gas velocities (5 m/s, 7.5 m/s), (ii) tendencies (iii) shapes. Transient simulations performed until system reaches by monitoring mass rates particulate phases leaving chamber. The non-spherical represented stochastic sampling from available experimental data. Analysis revealed log-scale variations if with respect fluctuates. Variations balances found be still visible CFD analysis, where drastically changed distribution native model which only accounts correction was over-predict entrainment, leading significantly fraction distributions. Spherical assumption also caused significant errors distribution, increases as aspect ratio cylindrical diverges one. Results show statistics extremely important capture mixing segregation patterns regime, cannot captured such simplifying assumptions.