Small-scale universality in the spectral structure of transitional pipe flows
| Autor: | Chien Chia Liu, Pinaki Chakraborty, Gustavo Gioia, Rory Cerbus |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Multidisciplinary Turbulence Spectral structure SciAdv r-articles Reynolds number Turbulence theory 01 natural sciences 010305 fluids & plasmas Universality (dynamical systems) Nonlinear Sciences::Chaotic Dynamics Physics::Fluid Dynamics symbols.namesake Applied Sciences and Engineering Physics::Space Physics Physical Sciences 0103 physical sciences symbols Physics::Accelerator Physics Statistical physics 010306 general physics Computer Science::Operating Systems Research Articles Research Article |
| Zdroj: | Science Advances |
| ISSN: | 2375-2548 |
| DOI: | 10.1126/sciadv.aaw6256 |
| Popis: | The flashes of transitional pipe flows are turbulent, in the sense of Kolmogorov. 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. |
| Databáze: | OpenAIRE |
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