The aim of these studies was to examine the suitability of the Euler-Lagrange approach for modelling the powder spraying process performed with a pneumatic nozzle used for dry coating in spout-fluid bed apparatus. Simulation results were validated using the digital PIV (Particle Image Velocimetry) method and measurement equipment constructed by the authors. The validation process led to the determination of the optimal Ansys Fluent solver settings, which ensure a satisfactory accuracy of the simulation results (the average relative error of all simulation points at the level of 10.5%). The experimental results are most accurately reflected by simulation results obtained with the use of the standard k − ε model that has the discrete random walk (DRW) model activated. The detailed analysis of the operation of the spout-fluid bed apparatus allowed for the examination of the influence of hydrodynamic parameters (the mass flow rate of the gas spraying the powder and plasticizer, as well as spouting gas) on the velocity and concentration of the dispersed phase in the device. The scientific investigation covered the analysis of the velocity profiles and the volume fraction of the coating powder in different zones of the column.

这些研究的目的是检查 Euler-Lagrange 方法对模拟粉末喷涂过程的适用性，气动喷嘴用于喷口流化床设备中的干涂层。使用作者构建的数字 PIV（粒子图像测速）方法和测量设备验证了模拟结果。验证过程导致确定最佳 Ansys Fluent 求解器设置，从而确保仿真结果具有令人满意的准确性（所有仿真点的平均相对误差在 10.5% 的水平）。使用标准k  −  ε获得的模拟结果最准确地反映了实验结果激活离散随机游走 (DRW) 模型的模型。对喷流流化床装置的操作进行详细分析，可以检查流体力学参数（喷洒粉末和增塑剂的气体的质量流量，以及喷出的气体）对流速和浓度的影响装置中的分散相。科学调查包括分析柱不同区域中的速度分布和涂层粉末的体积分数。