化工学报2018，Vol.69Issue(1)：389-395,封3,8.DOI:10.11949/j.issn.0438-1157.20170830
曳力模型和湍流模型对内环流反应器数值模拟的影响
Effects of drag model and turbulence model on simulation of air-lift internal-loop reactor
摘要
Abstract
The influence of drag models and turbulence models on the hydrodynamic parameters in an air-lift internal-loop reactor is evaluated.Drag models determine the existence of gas in downcomer, and drag models and turbulence models jointly determine the accuracy of the simulation of gas holdup.Using uniform size bubbles, the Schiller-Naumann, Tomiyama, Grace and Ishii-Zuber drag models are only suitable for lower superficial gas velocity, and there is no gas in downcomer.The capability of DBS-Local drag model was confirmed.Compared with the other four drag models, only DBS-Local drag model can predict the existence of gas in downcomer.DBS-Local drag model combining with the standardk-ε mixture turbulence model can well predict gas holdup, and combining with RNGk-ε dispersed turbulence model can better predict liquid velocity.关键词
计算流体力学/内环流反应器/气液两相流/曳力模型/湍流模型/气含率Key words
CFD/internal-loop reactor/gas-liquid flow/drag model/turbulence model/gas holdup分类
化学化工引用本文复制引用
张佳宝,崔丽杰,杨宁..曳力模型和湍流模型对内环流反应器数值模拟的影响[J].化工学报,2018,69(1):389-395,封3,8.基金项目
国家重点研发计划项目(2017YFB0602500) （2017YFB0602500）
国家自然科学基金项目(91434121,91634203). supported by the National Key Research and Development Program of China (2017YFB0602500) and the National Natural Science Foundation of China (91434121,91634203). （91434121,91634203）
