On the Richardson Extrapolation of the Reynolds Stress with the Systematic Grid and Model Variation Method
On the Richardson Extrapolation of the Reynolds Stress with the Systematic Grid and Model Variation Method
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基于系统网格和模型变分法的雷诺应力理查森外推
DOI：
10.1007/978-3-030-04915-7_20
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
M. Germano
中科院分区：
文献类型：
--
作者：
M. Klein;G. Scovazzi;M. Germano
提出了一种新的理查森外推法来重建 LES 中的雷诺应力。该方法基于系统网格和模型变分方法中建议的三个 LES 模拟，并且形式体系中出现了两个新术语。对于湍流平面射流，这两项虽小但合理，并且解析剪切应力的外推效果很好。该方法灵活，可以结合不同的策略。初步结果很有希望，但需要更多不同流动配置和更高雷诺数的经验。
A new operational Richardson extrapolation has been proposed to reconstruct the Reynolds stresses in LES. The method is based on three LES simulations as suggested in the Systematic Grid and Model Variation approach, and two new terms appear in the formalism. For a turbulent planar jet these two terms are small but reasonable and the extrapolation of the resolved shear stress works qualitatively well. The method is flexible and can be combined with different strategies. First results are promising, but more experience is needed with different flow configurations and higher Reynolds number.