期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
A one-equation turbulence model for recirculating flows 被引量:1
1
作者 Yang Zhang Jun Qiang Bai +1 位作者 Jing Lei Xu Yi Li 《中国科学:物理学、力学、天文学英文版》 SCIE EI CAS CSCD 2016年第6期77-88,共12页
A one-equation turbulence model which relies on the turbulent kinetic energy transport equation has been developed to predict the flow properties of the recirculating flows. The turbulent eddy-viscosity coefficient is... A one-equation turbulence model which relies on the turbulent kinetic energy transport equation has been developed to predict the flow properties of the recirculating flows. The turbulent eddy-viscosity coefficient is computed from a recalibrated Bradshaw’s assumption that the constant a1= 0.31 is recalibrated to a function based on a set of direct numerical simulation(DNS) data. The values of dissipation of turbulent kinetic energy consist of the near-wall part and isotropic part, and the isotropic part involves the von Karman length scale as the turbulent length scale. The performance of the new model is evaluated by the results from DNS for fully developed turbulence channel flow with a wide range of Reynolds numbers. However, the computed result of the recirculating flow at the separated bubble of NACA4412 demonstrates that an increase is needed on the turbulent dissipation, and this leads to an advanced tuning on the self-adjusted function. The improved model predicts better results in both the non-equilibrium and equilibrium flows, e.g. channel flows, backward-facing step flow and hump in a channel. 展开更多
关键词 湍流模型 循环流动 输运方程 直接数值模拟 各向同性 模型预测 流动特性 湍流动能
上一页 1 下一页 到第
使用帮助 返回顶部 意见反馈