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CFD Simulation of Mixing and Segregation of Binary Solid Mixtures in a Dense Fluidized Bed |
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| Authors: | Bozidar Anicic Bona Lu Weigang Lin Hao Wu Kim Dam-Johansen Wei Wang |
| Affiliation: | 1. Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads, Building 229, Kongens Lyngby, Denmark
Sino-Danish Center for Education and Research, 380 Huaibeizhuang, Huairou District, Beijing, China Sino-Danish College, University of Chinese Academy of Science, Beijing, Huairou District, China;2. Sino-Danish College, University of Chinese Academy of Science, Beijing, Huairou District, China;3. Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads, Building 229, Kongens Lyngby, Denmark;4. Sino-Danish College, University of Chinese Academy of Science, Beijing, Huairou District, China Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China |
| Abstract: | The mixing and segregation behaviour of binary solid mixtures has been extensively studied through various experiments, while accurate CFD simulations are difficult to achieve due to process complexity and a lack of reliable constitutive relations. In this study, CFD simulations of a dense fluidized bed with glass and polystyrene particles were performed in order to identify a universal set of simulation parameters and models for simulating binary mixtures with different mixed and segregation behaviour. Through a comparison to experimental data, it was found that the EMMS drag model coupled with the Ma-Ahmadi solid pressure and radial distribution models predicted more a reasonable axial distribution of solid phases than the Syamlal O'Brien drag model coupled with the Lun et al. solid pressure and radial distribution models. The increase in the solid-solid drag further improved the simulation results. |
| Keywords: | binary mixture CFD drag coefficient EMMS solid-solid drag |