Collapse of the turbulent dissipative range on Kolmogorov scales

Title: Collapse of the turbulent dissipative range on Kolmogorov scales
Creator: Antonia, R. A.; Djenidi, L.; Danaila, L.
Relation: ARC
Relation: Physics of Fluids Vol. 26, Issue 4
Publisher Link: http://dx.doi.org/10.1063/1.4869305
Publisher: American Institute of Physics
Resource Type: journal article
Date: 2014
Description: It is pointed out that the collapse of the turbulent dissipative range on Kolmogorov scales does not require either of the two major assumptions in Kolmogorov's [“The local structure of turbulence in incompressible viscous fluid for very large Reynolds numbers,” Dokl. Akad. Nauk USSR30, 299 (1941)] similarity hypothesis, i.e., R λ, the Taylor microscale Reynolds number, is very large and local isotropy is satisfied. In particular, the Kolmogorov velocity and length scales are shown to be the appropriate normalization scales when the large-scale terms in the transport equations for the second-order statistics can be neglected. Evidence for this scaling is discussed critically on the basis of the available data. It is also shown that this scaling breaks down when R λ becomes too small, typically below 20.
Subject: turbulent flows; Reynolds stress modeling; isotropic turbulence; eddies; spatial resolution
Identifier: http://hdl.handle.net/1959.13/1061993
Identifier: uon:17029
Identifier: ISSN:1070-6631
Language: eng
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