In case of large CFBs, steady state CFD simulation can be an attractive alternative for the time-consuming transient simulations. In the paper, the features of equation closure of a steady state model are evaluated on basis of a transient 3D simulation. The computational results are analysed to determine the averaged flow properties and the main fluctuating components and their correlations. The main terms to be modelled for the steady state approach are, according to this analysis, the average gas-particle drag force and the Reynolds stresses arising from velocity fluctuations. Suggestions for approaches for steady state equation closure in case of industrial CFB applications are discussed.
|Title of host publication||Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9|
|Place of Publication||Hamburg|
|Publication status||Published - 2008|
|MoE publication type||A4 Article in a conference publication|
|Event||9th International Conference on Circulating Fluidized Beds, CFB9 - Hamburg, Germany|
Duration: 13 May 2008 → 16 May 2008
|Conference||9th International Conference on Circulating Fluidized Beds, CFB9|
|Period||13/05/08 → 16/05/08|
- Circulating fluidized bed
- Time averaging
Kallio, S., Taivassalo, V., & Hyppänen, T. (2008). Towards time-averaged CFD modelling of circulating fluidized beds. In J. Werther (Ed.), Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9 (pp. 259-264).