摘要
应用SSTkω-湍流模型对Rushton搅拌釜流场进行了计算,并与文献报道实验数据以及标准k-ε模型、RNGkω-模型预测结果进行了比较。结果表明SSTkω-模型所计算的排除流量准数与实验值相差较小,桨叶区速度场与实验数据吻合较好,略优于标准k-ε模型,同时也给出了近壁区的计算结果。在湍动动能的预报上,SSTk-ω模型值与标准k-ε模型比较接近,优于RNGkε-模型,但与实验值都还不同程度地存在着一些差异。
The shear-stress transport （SST） k-ω turbulence model was a viscous two-equation turbulence model established on Boussinesq hypothesis, which combined both the advantage of k-ω model simulation in boundary layer and the advantage of k-ω model simulation in main flow region. The results of numerical simulation by SST k-ω model for velocity field in standard Rushton stirred tank were slightly better than those simulated by standard k-ε model and also well fitted the reported experimental data. The value of pumping number calculated by SST k-ε model was slightly lower than experimental value and the predicted velocity data near wall region also were provided. The prediction ability for turbulent energy by SST k-ω model approached standard k-ε model＇s ability, and both of them were better than RNG k-ε model. However there still are some differences between model values and experimental data in this aspect.
出处
《化学工程》
CAS
CSCD
北大核心
2006年第3期28-32,共5页
Chemical Engineering(China)
