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Discrete bubble model for prediction of bubble behavior in 3D fluidized beds

Movahedirad, S ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1002/ceat.201100383
  3. Publisher: 2012
  4. Abstract:
  5. A discrete bubble model has been developed taking into account multiple bubble-bubble interactions and a delayed coalescence method. The obtained simulation results were compared with experimental data reported in literature. The simulation results predicted by the developed model indicate clearly that the multiple interactions of bubbles lead to more reasonable results than those predicted by a binary interaction model. In addition, two types of interaction models were applied and predicted results were compared. The frequency of gas bubbles passing through the bed cross section versus bed height follows the same trend as the experimental data. A new modified discrete bubble model has been developed for freely bubbling fluidized beds. The influence of two various types of bubble-bubble interaction models on the bubble behavior were investigated and a new coalescence method based on the wake angle of gas bubbles was applied. It was found that the delayed coalescence method predicts bubble behavior better than the sudden coalescence method
  6. Keywords:
  7. Bubble-bubble interactions ; Discrete bubble model ; Wake ; Bed height ; Binary interactions ; Bubble behavior ; Bubble-bubble interaction ; Bubbling fluidized bed ; Cross section ; Developed model ; Discrete bubble models ; Experimental data ; Gas bubble ; Gas-solid fluidized bed ; Interaction model ; Multiple interactions ; Bubbles (in fluids) ; Coalescence ; Fluidized beds ; Wakes ; Three dimensional
  8. Source: Chemical Engineering and Technology ; Volume 35, Issue 5 , 2012 , Pages 929-936 ; 09307516 (ISSN)
  9. URL: http://onlinelibrary.wiley.com/doi/10.1002/ceat.201100383/abstract