Heterogeneity analysis of gas-solid flow hydrodynamics in a pilot-scale fluidized bed reactor

作     者：Jiawei Liao Litao Zhu Zhenghong Luo Jiawei Liao;Litao Zhu;Zhenghong Luo

作者机构：Department of Chemical EngineeringSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第50卷第10期

页      面：117-129页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 0817[工学-化学工程与技术] 08[工学] 081701[工学-化学工程] 0703[理学-化学] 

基　　金：supported by the Center for High Performance Computing at Shanghai Jiao Tong University 

主　　题：Fluidized bedreactor Bubbling gas–solidflows Mesoscale dragmodels Coarse-grid TFMsimulations Heterogeneity analysis 

摘      要：Mesoscale drag model is of crucial significance for the reliability and accuracy in coarse-grid EulerianEulerian two-fluid model(TFM)simulations of gas-solid flow hydrodynamics in fluidized bed *** numerous mesoscale drag models have been reported in the literature,a systematic comparison of their prediction capability from the perspective of heterogeneity analysis is still *** this study,in order to investigate the effect of several typical drag models on the hydrodynamic behaviors,the nonuniformity analysis and the sensitivity to material properties,extensive coarse-grid TFM simulations of a bubbling pilot-scale fluidized bed reactor are carried *** results demonstrate that the mesoscale drag models outperform the empirical drag model in terms of nonuniformity due to the consideration of the influence of the mesoscale structures on the drag force in the bubbling ***,the results reveal that our previously developed three-marker gradient-based drag model considering the solid concentration gradient exhibits satisfactory performance in predicting the bubbling flow ***,the material-property-dependent drag model considering the explicit effect of material properties on drag corrections is most sensitive to the particle *** work provides guideline for possible future improvements of mesoscale models to simulate gas-solid flow more accurately and universally.