Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Small-scale universality in the spectral structure of transitional pipe flows.
Science Advances ( IF 13.6 ) Pub Date : 2020-01-24 , DOI: 10.1126/sciadv.aaw6256 Rory T Cerbus 1 , Chien-Chia Liu 1 , Gustavo Gioia 2 , Pinaki Chakraborty 1
Science Advances ( IF 13.6 ) Pub Date : 2020-01-24 , DOI: 10.1126/sciadv.aaw6256 Rory T Cerbus 1 , Chien-Chia Liu 1 , Gustavo Gioia 2 , Pinaki Chakraborty 1
Affiliation
Turbulent flows are not only everywhere, but every turbulent flow is the same at small scales. The extraordinary simplification engendered by this "small-scale universality" is a hallmark of turbulence theory. However, on the basis of the restrictive assumptions invoked by A. N. Kolmogorov to demonstrate this universality, it is widely thought that only idealized turbulent flows conform to this framework. Using experiments and simulations that span a wide range of Reynolds number, we show that small-scale universality governs the spectral structure of a class of flows with no apparent ties to the idealized flows: transitional pipe flows. Our results not only extend the universality of Kolmogorov's framework beyond expectation but also establish an unexpected link between transitional pipe flows and Kolmogorovian turbulence.
中文翻译:
过渡管流频谱结构中的小规模通用性。
湍流不仅在任何地方,而且每一个小规模的湍流都是相同的。这种“小规模普遍性”带来的非同寻常的简化是湍流理论的标志。然而,根据AN Kolmogorov所提出的限制性假设来证明这种普遍性,人们普遍认为只有理想的湍流才符合该框架。使用跨越广泛雷诺数的实验和模拟,我们表明小规模的普遍性支配着一类流的光谱结构,而与理想化的流没有明显的联系:过渡管道流。我们的结果不仅使Kolmogorov框架的通用性超出了预期,而且在过渡管道流量和Kolmogorovian湍流之间建立了意想不到的联系。
更新日期:2020-01-26
中文翻译:
过渡管流频谱结构中的小规模通用性。
湍流不仅在任何地方,而且每一个小规模的湍流都是相同的。这种“小规模普遍性”带来的非同寻常的简化是湍流理论的标志。然而,根据AN Kolmogorov所提出的限制性假设来证明这种普遍性,人们普遍认为只有理想的湍流才符合该框架。使用跨越广泛雷诺数的实验和模拟,我们表明小规模的普遍性支配着一类流的光谱结构,而与理想化的流没有明显的联系:过渡管道流。我们的结果不仅使Kolmogorov框架的通用性超出了预期,而且在过渡管道流量和Kolmogorovian湍流之间建立了意想不到的联系。