CFD simulation of jet behaviors in a binary gas-solid fluidized bed: Comparisons with experiments

Pei Pei, Guiying Wu, Kai Zhang, Bangting Yu, Jianchun Jiang, Dongsheng Wen

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Based on the experimental observation of the fluidization characteristics of solid mixtures (resin and rapeseed) with different densities and sizes, the jet behaviours of the binary system are simulated in a two-dimensional jetting fluidized bed 0.30m in width and 2.00m in height. A simple mathematical model, by introducing two additional force terms in both gas and particle phase momentum equations of Gidaspow's inviscid two-fluid model, is used to explore the effects of jet gas velocity and mixture combination on the jet penetration depth in the fluidized bed with a binary system. Experimental results show that there is a fluidization velocity interval (uif-uff) for the resin-on-rapeseed (flotsam-on-jetsam) segregated bed. The simulated jet penetration depth increases with the increase of jet gas velocity and the volume fraction of the flotsam (resin), which is in fair agreement with experimental data. The above findings show that the hydrodynamic model of Brandani and Zhang (2006), by introducing the average physical properties from Goossens et al.(1971), can be used to predict the jet behaviors of a well-mixing binary system.

Original languageEnglish
Pages (from-to)242-249
Number of pages8
JournalFrontiers of Chemical Engineering in China
Volume4
Issue number3
DOIs
StatePublished - 2010
Externally publishedYes

Keywords

  • Binary mixture
  • Gas-solid fluidized bed
  • Jet behavior

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