ZHANG Jiabao, CUI Lijie, YANG Ning. Effects of drag model and turbulence model on simulation of air-lift internal-loop reactor[J]. CIESC Journal, 2018, (1): 389-395.
ZHANG Jiabao, CUI Lijie, YANG Ning. Effects of drag model and turbulence model on simulation of air-lift internal-loop reactor[J]. CIESC Journal, 2018, (1): 389-395.DOI: 10.11949/j.issn.0438-1157.20170830.
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.