湍流
物理
逆压力梯度
边界层厚度
直接数值模拟
数学分析
湍流动能
湍流模型
雷诺数
K-omega湍流模型
边界(拓扑)
出处
期刊:AIAA Journal
[American Institute of Aeronautics and Astronautics]
日期:1993-08-01
卷期号:31 (8): 1414-1421
被引量:260
摘要
This paper compares the performance of eight low Reynolds number k-epsilon and k-omega models for high Reynolds number, incompressible turbulent boundary layers with favorable, zero, and adverse pressure gradients. Results obtained underscore the k-epsilon model's unsuitability for such flows. Even more seriously, the k-epsilon model is demonstrated to be inconsistent with the well-established physical structure of the turbulent boundary layer, and low Reynolds number corrections cannot remove the inconsistency. By contrast, the k-omega model, with and without low Reynolds number modifications, proves to be very accurate for all of the tests conducted. 16 refs.
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