Abstract This paper presents validation and verification study of a novel VπLES method which is based on the decomposition of the flow structures in large scale ones, resolved on the grid, and small scale ones, represented by vortex particles for the turbulent circular free jet at R e = 10 4 . Comparison with experiments for mean velocities and fluctuations shows that the VπLES simulation with 1.5 · 105 cells attains the similar accuracy as the LES with the Dynamic Smagorinsky model on the Grid with 6.04 · 106 cells. The model is capable of reproducing the backward energy transfer, anisotropy of fine scales velocities and is automatically switched off when the flow is laminar. Numerical scheme parameters and the model reduction are studied and discussed.

中文翻译：

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使用涡流粒子增强 LES (VπLES) 模拟自由射流

摘要 本文提出了一种新的 VπLES 方法的验证和验证研究，该方法基于大尺度流动结构的分解，在网格上解析，小尺度流动结构由涡流粒子表示，用于 R 处的湍流圆形自由射流。 e = 10 4 。与平均速度和波动实验的比较表明，具有 1.5·105 个单元的 VπLES 模拟与具有 6.04·106 个单元的网格上的动态 Smagorinsky 模型的 LES 模拟达到相似的精度。该模型能够再现反向能量传递、精细尺度速度的各向异性，并在流动为层流时自动关闭。研究和讨论了数值方案参数和模型简化。