Assessment of polydisperse drag models for the size segregation in a bubbling fluidized bed using discrete particle method. (16th March 2017)

• Record Type: Journal Article
• Authors: Zhang, Yong; Zhao, Yuemin; Lu, Liqiang; Ge, Wei; Wang, Junwu; Duan, Chenlong
• Is Part Of: Chemical engineering science. Volume 160(2017)
• Page Start: 106
• Page End: 112
• Publication Date: 2017-03-16
• Subjects: Drag force model -- Fluidization -- Gas-solid flow -- Multiphase flow -- CFD-DEM method; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; Chemical engineering; Periodicals; Electronic journals; 660
• DOI: 10.1016/j.ces.2016.11.028
• Languages: English
• ISSNs: 0009-2509

Abstract

Abstract: Polydisperse gas-particle flow is often encountered in industry and many polydisperse drag models have been developed in literature. In this work, discrete particle method was employed to assess polydisperse drag models for the segregation and mixing of binary gas-particle flow in a bubbling fluidized bed. The degree of particle segregation and the characteristic bubble frequency using different polydisperse drag models were analyzed. It was shown that the results predicted by the model ofRong et al. (2014) are in a best agreement with experimental data with 5.3% errors on average, and two dominant bubble frequencies were found by analyzing the fluctuations of average particle height. Graphical abstract: Highlights: A parallel CFD-DEM method was used to simulate a binary gas-solid system. The effects of polydisperse drag models on the size segregation were studied. Two dominant bubble frequencies were found in the binary gas-solid system.