Numerical simulation of the flow within and over an intersection model with Reynolds-averaged Navier-Stokes method

• 来源期刊: 中国物理（英文版）
• 关键词: RANS numerical simulation intersection turbulence closure model
• 年，卷（期）: 2006,（1）
• 页码范围: 149-155
• 页数: 7页
• 语种: 英文

摘要

In this study, the Reynolds-averaged Navier Stokes (RANS) method is employed to simulate the flow within and over an intersection model with three kinds of κ-ε turbulence closure schemes, namely, standard model, renormalization group (RNG) model and realizable κ-ε model. The comparison between the simulated and observed flow fields shows that the RANS simulation with all the three turbulence models cannot completely and accurately reproduce the observed flow field in all details. A detailed comparison between the predicted profiles of wind velocities and the measured data shows that the realizable κ-ε model is the best one among the three turbulence closure models in general. However, the extent to which the improvement is achieved by the realizable κ-ε model is still not enough to completely and accurately describe the turbulent flow in a relatively complex environment.