Experimental test of the crossover between the inertial and the dissipative range in a turbulent swirling flow
The kinetic energy spectrum of high-Reynolds turbulent swirling flows is experimentally studied. This spectrum, obtained from direct measurements in space, exhibits nearly two decades of Kol-mogorov k −5/3 decay in the inertial range of scales. Beyond this regime, in the dissipative range of scales,...
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Veröffentlicht in: | Physical review fluids 2018-02, Vol.3 (2), Article 024602 |
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Hauptverfasser: | , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | The kinetic energy spectrum of high-Reynolds turbulent swirling flows is experimentally studied. This spectrum, obtained from direct measurements in space, exhibits nearly two decades of Kol-mogorov k −5/3 decay in the inertial range of scales. Beyond this regime, in the dissipative range of scales, a crossover to a stretched exponential decay on scale k 2/3 is observed, in full agreement with a recent theoretical prediction based on Non-Perturbative Renormalization Group theory. |
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ISSN: | 2469-990X 2469-990X |
DOI: | 10.1103/PhysRevFluids.3.024602 |