Turbulence Models in Pulsating Flows
Turbulence Models in Pulsating Flows
复制标题
DOI：
10.2514/2.1679
复制
发表时间：
2001-01
期刊：
影响因子：
2.5
通讯作者：
A. Scotti;U. Piomelli
中科院分区：
文献类型：
--
作者：
A. Scotti;U. Piomelli
应用非定常雷诺平均d Navier-Stokes方程，对四种低雷诺数模型的性能进行了比较。所考虑的模型是单方程Spalart-Allmaras模型，具有Lam和Bremhorst壁函数的k-”模型，k-！2模型和Durbin的k-"-v2模型。结果进行了比较实验，直接模拟，大涡模拟。这些模型给出了相似的和相当准确的结果，预测通道中的速度分布作为相位的函数，并再现了部分周期期间观察到的行为。然而，模型本身之间存在很大的差异，以及相对于大涡模拟，在雷诺剪应力，湍流动能和耗散率的水平。k-"-v2模型总体上上级所考虑的其他模型。
The performances of four low-Reynolds-number models are compared for the unsteady Reynolds-average d Navier–Stokes equations applied to the ow in a channel driven by a pressure gradient oscillating around a nonzero mean. The models considered are the one-equation Spalart–Allmaras model, the k–" model with the wall functions of Lam and Bremhorst, the k–! 2 model of Saffman and Wilcox, and the k–"–v 2 model of Durbin. The results are compared with experiments, direct simulations, and large-eddy simulations. The models give similar and reasonably accurate results as far as predicting the velocity prole in the channel as a func tion of the phase and reproduce the observed behavior during part of the cycle. However, large differences exist between the models themselves, as well as with respect to the large eddy simulations, at the level of the Reynolds shear stress, turbulent kinetic energy, and dissipation rate. The k–"–v2 model is overall superior to the other models considered.