化工学报2025，Vol.76Issue(6)：2559-2568,10.DOI:10.11949/0438-1157.20241497
湍流对双组分颗粒流化床气体径向扩散的影响
Effects of turbulence on radial gas diffusion in binary particle fluidized bed
摘要
Abstract
In this work,the constants of the standard k-ε turbulence model were optimized to reduce numerical diffusion during simulations of gas diffusion in a binary fluidized bed.The research results show that when the Launder turbulence model constants are used,the turbulence intensity of the flow field in the fluidized bed is too large,resulting in a large difference between the simulation results and the experimental data.By adjusting the turbulence model constants,the calculation accuracy can be significantly improved,and the simulation results are more consistent with the experimental data.When the gas velocity is low,turbulence has little effect on the radial diffusion of gas.But when the gas velocity is high,the consistency between the simulation results and the experimental data using the new model constants is significantly improved.As the concentration of heavy particles in the fluidized bed increased,the tracer concentration in the central region initially decreased,and then increased.The introduction of the second component affected the turbulence intensity in the fluidized bed in a more complex manner.关键词
流化床/湍流模型常数/气体扩散/两相流/计算流体力学Key words
fluidized bed/turbulent model constants/gas diffusion/two phase flow/CFD分类
化学化工引用本文复制引用
张亿韵,陈恒志,李洋,慕长安,王泉海..湍流对双组分颗粒流化床气体径向扩散的影响[J].化工学报,2025,76(6):2559-2568,10.基金项目
国家自然科学基金项目(51374261) （51374261）
