Comparison of two-equation turbulence models for boundary layers with pressure gradient
Comparison of two-equation turbulence models for boundary layers with pressure gradient
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DOI：
10.2514/3.11790
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发表时间：
1993-08
期刊：
影响因子：
2.5
通讯作者：
D. Wilcox
中科院分区：
文献类型：
--
作者：
D. Wilcox
本文比较了八种低雷诺数k-epsilon和k-omega模型对具有有利、零和不利压力梯度的高雷诺数不可压缩湍流边界层的性能。得到的结果强调了k-epsilon模型对这种流动的不适用性。更严重的是，k-epsilon模型被证明与已建立的湍流边界层物理结构不一致，低雷诺数修正不能消除这种不一致。相比之下，无论是否进行低雷诺数修正，k-omega模型都证明对所有进行的测试都非常准确。参16。
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.