Although CFD-DEM simulation of Geldart B and D particles has been experimentally validated extensively, its experimental validation for simulating the hydrodynamics of Geldart A particles has been seldom reported, due to the fact that even the particle number in a laboratory fluidized bed is too much to be tracked individually. In this study, one-to-one comparison between experimental and CFD-DEM study of a miniaturized gas-solid fluidized bed (micro-fluidized bed) containing FCC particles was performed. It was shown that the bed expansion characteristics in bubbling fluidization regime, the mean voidage of emulsion phase as well as the bed collapse process can be predicted accurately by CFD-DEM method. The results not only provide experimental validation of CFD-DEM method for studying the heterogeneous dynamics of Geldart A particles in bubbling fluidized beds, but also prove that CFD-DEM method is an ideal and powerful tool for exploring the behavior of micro-fluidized beds.

尽管Geldart B和D颗粒的CFD-DEM模拟已经得到了广泛的实验验证，但由于即使实验室流化床中的颗粒数也太多，因此很少有关于模拟Geldart A颗粒的流体动力学的实验验证。进行单独跟踪。在这项研究中，对包含FCC颗粒的小型气固流化床（微流化床）的实验和CFD-DEM研究进行了一对一的比较。结果表明，利用CFD-DEM方法可以准确地预测鼓泡流化过程中的床膨胀特性，乳液相的平均空隙度以及床的塌陷过程。