Banaei Mohammad, Jegers Jeroen, van Sint Annaland Martin, Kuipers Johannes A M, Deen Niels G
Multiphase Reactors Group, Department of Chemical Engineering & Chemistry, and Multiphase and Reactive Flows Group, Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands.
Ind Eng Chem Res. 2017 Aug 2;56(30):8729-8737. doi: 10.1021/acs.iecr.7b00338. Epub 2017 Jul 11.
The hydrodynamics and heat transfer of cylindrical gas-solid fluidized beds for polyolefin production was investigated with the two-fluid model (TFM) based on the kinetic theory of granular flow (KTGF). It was found that the fluidized bed becomes more isothermal with increasing superficial gas velocity. This is mainly due to the increase of solids circulation and improvement in gas solid contact. It was also found that the average Nusselt number weakly depends on the gas velocity. The TFM results were qualitatively compared with simulation results of computational fluid dynamics combined with the discrete element model (CFD-DEM). The TFM results were in very good agreement with the CFD-DEM outcomes, so the TFM can be a reliable source for further investigations of fluidized beds especially large lab-scale reactors.
基于颗粒流动力学理论（KTGF），采用双流体模型（TFM）研究了用于聚烯烃生产的圆柱形气固流化床的流体动力学和传热特性。研究发现，随着表观气速的增加，流化床的等温性增强。这主要归因于固体循环的增加和气固接触的改善。还发现平均努塞尔数对气速的依赖性较弱。将TFM结果与计算流体动力学结合离散单元模型（CFD-DEM）的模拟结果进行了定性比较。TFM结果与CFD-DEM结果非常吻合，因此TFM可作为进一步研究流化床尤其是大型实验室规模反应器的可靠依据。
