%0 Journal Article %A ZHANG Jiabao %A CUI Lijie %A YANG Ning %T Effects of drag model and turbulence model on simulation of air-lift internal-loop reactor %D 2018 %R 10.11949/j.issn.0438-1157.20170830 %J CIESC Journal %P 389-395 %V 69 %N 1 %X

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 standard k-ε mixture turbulence model can well predict gas holdup, and combining with RNG k-ε dispersed turbulence model can better predict liquid velocity.

%U https://hgxb.cip.com.cn/EN/10.11949/j.issn.0438-1157.20170830