化工学报2017，Vol.68Issue(7)：2667-2677,11.DOI:10.11949/j.issn.0438-1157.20170025
基于EMMS方法的鼓泡塔反应器CFD及群平衡模拟
CFD-PBM simulation with EMMS correctors for bubble column reactors
摘要
Abstract
The energy-minimization multi-scale (EMMS) model has been introduced to improve the population balance modeling (PBM) of gas-liquid flows. The energy for bubble breakup and coalescence can be obtained from the EMMS model and then used to derive a correction factor for the coalescence rate. This new model is applied in this study to simulate the bubble columns of high flow rates. Simulations using the three different models, namely, the constant-bubble-size model, the CFD-PBM model and the CFD-PBM-EMMS model, are compared with experimental data. The simulation of CFD-PBM-EMMS gives better prediction for bubble size distribution and liquid axial velocity at different heights as well as the overall and local gas holdup. The relative error of global gas holdup reduces to 5% or 15%, and the mean relative error of local gas holdup reduces to 8% or 17% for 0.16 m·s-1 or 0.25 m·s-1 of superficial gas velocity.关键词
计算流体力学/群平衡模型/鼓泡塔/气含率/气泡尺径分布Key words
CFD/population balance modeling/bubble column/gas holdup/bubble size distribution分类
化学化工引用本文复制引用
王珏,杨宁..基于EMMS方法的鼓泡塔反应器CFD及群平衡模拟[J].化工学报,2017,68(7):2667-2677,11.基金项目
国家自然科学基金项目(91434121,91634203).supported by the National Natural Science Foundation of China (91434121,91634203). （91434121,91634203）
