Studying the particle size ratio effect on granular mixing in a vertically vibrated bed of two particle types  

作　　者：Amir Menbari Kamyar Hashemnia 

机构地区：[1]School of Mechanical Engineering,Shiraz University,Molla Sadra St.,Shiraz,Iran

出　　处：《Particuology》2020年第6期100-111,共12页颗粒学报（英文版）

摘　　要：The uniform mixing of solids is important in many industries,such as the pharmaceutical,food,petrochemical and chemical industries.We numerically investigated the effect of particle size ratio on the mixing of bisized particles in a quasi-two-dimensional vibrationally fluidized bed.The granular bin ary mixtures comprised spherical particles with different size ratios.Three-dimensional discrete-element simulations agreed with previous experimental results.Convective and diffusive mechanisms occurred Keywords:Discrete-element modeling Fluidization Granular media Mixing Particle size ratio Vibration within the vibrated bed.The particle size had no significant influence on convective mixing,whereas the diffusive mechanism strengthened for large size ratios.The average particle velocity was larger in a mixture of large size ratios.The stronger diffusive motion and larger average particle velocity caused the particles to mix faster for large size ratios.The final mixing index decreased with size ratio because of the difference between the size and number of small and large particles.

关 键 词：Discrete-element modeling FLUIDIZATION Granular media MIXING Particle size ratio Vibration 

分 类 号：TQ051[化学工程]