论文标题
等温湍流流动中亚网格尺度模型的后验测试
A posteriori tests of subgrid-scale models in an isothermal turbulent channel flow
论文作者
论文摘要
本文研究了等温湍流通道流的大涡模拟（LES）。我们研究了没有壁功能或壁模型的零方程代数模型：功能模型，结构模型和混合模型。除了文献模型外，还提出了新的模型，并检查了它们的相关性。还分析了每种模型的动态版本。使用相同的有限差异方法和物理配置评估子网格规模模型的性能。模拟的摩擦雷诺数为180。使用了三种不同的网格分辨率。将大涡模拟的预测与在LES网格分辨率下过滤的直接数值模拟进行了比较。结果比没有模型的模拟更准确。可以使用恒定参数或动态张力方法来改进功能性涡流模型的预测。
This paper studies the large-eddy simulation (LES) of isothermal turbulent channel flows. We investigate zero-equation algebraic models without wall function or wall model: functional models, structural models and mixed models. In addition to models from the literature, new models are proposed and their relevance is examined. Dynamic versions of each type of model are also analysed. The performance of the subgrid-scale models is assessed using the same finite difference numerical method and physical configuration. The friction Reynolds number of the simulations is 180. Three different mesh resolutions are used. The predictions of large-eddy simulations are compared to a direct numerical simulation filtered at the resolution of the LES meshes. The results are more accurate than a simulation without model. The predictions of functional eddy-viscosity models can be improved using constant-parameter or dynamic tensorial methods.
