The particle dynamics in a flighted rotary drum operated with different numbers of flights and under different operating conditions was simulated by using both the Eulerian (computational fluid dynamics, CFD) and the Lagrangian (discrete element method, DEM) approaches. The simulated solid holdups in the flights as a function of the flights’ tip angular position were compared with experimental data. A systematic analysis of the computational demands of each approach was performed, as well as the impact of reducing the particle shear modulus in DEM simulations. Furthermore, the influence of the turbulence phenomenon on the particle behavior predicted by CFD simulations was also assessed. The choice of an appropriate numerical approach proved to be of great importance in the accuracy of particle dynamics prediction in a flighted rotary drum.

通过使用欧拉（计算流体动力学，CFD）和拉格朗日（离散元方法，DEM）方法，模拟了在不同飞行次数和不同运行条件下运行的旋转滚筒中的颗粒动力学。将飞行中模拟的固体固持量（随飞行器尖端角度位置的变化）与实验数据进行比较。对每种方法的计算需求进行了系统分析，以及在DEM模拟中减小颗粒剪切模量的影响。此外，还评估了湍流现象对CFD模拟预测的颗粒行为的影响。事实证明，选择合适的数值方法对于飞行的转鼓中颗粒动力学预测的准确性非常重要。