Petroleum Science >2009,??Issue 1:??69-75 DOI: https://doi.org/10.1007/s12182-009-0013-0
CFD simulation of bubbling and collapsing characteristics in a gas-solid fluidized bed Open?Access
文章信息
作者：Pei Pei, Kai Zhang, Erwei Lu & Dongsheng Wen
作者单位：
投稿时间：04 February 2009
引用方式：Pei, P., Zhang, K., Lu, E. et al. CFD simulation of bubbling and collapsing characteristics in a gas-solid fluidized bed. Pet. Sci. 6, 69–75 (2009). https://doi.org/10.1007/s12182-009-0013-0
文章摘要
Computational Fluid Dynamics (CFD) has become an alternative method to experiments for understanding the fluid dynamics of multiphase flow. A two-fluid model, which contains additional terms in both the gas- and solid-phase momentum equations, is used to investigate the fluidization quality in a fluidized bed. A case study for quartz sand with a density of 2,660 kg/m3 and a diameter of 500 μm, whose physical property is similar to a new kind of catalyst for producing clean fuels through the residue fluid catalytic cracking process, is simulated in a two-dimensional fluidized bed with 0.57 m width and 1.00 m height. Transient bubbling and collapsing characteristics are numerically investigated in the platform of CFX 4.4 by integrating user-defined Fortran subroutines. The results show that the fluidization and collapse process is in fair agreement with the classical theory of Geldart B classification, but the collapse time is affected by bubbles at the interface between the dense phase and freeboard.
关键词
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Fluidized bed; CFD simulation; bubbling and collapsing behaviors