Related self-similar statistics of the turbulent/non-turbulent interface and the turbulence dissipation

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Title: Related self-similar statistics of the turbulent/non-turbulent interface and the turbulence dissipation
Authors: Zhou, Y
Vassilicos, JC
Item Type: Journal Article
Abstract: The scalings of the local entrainment velocity of the turbulent/non-turbulent interface and of the turbulence dissipation rate are closely related to each other in an axisymmetric and self-similar turbulent wake. The turbulence dissipation scaling implied by the Kolmogorov equilibrium cascade phenomenology is consistent with a Kolmogorov scaling of whereas the non-equilibrium dissipation scaling reported for various turbulent flows in Vassilicos (Annu. Rev. Fluid Mech., vol. 47, 2015, pp. 95–114), Dairay et al. (J. Fluid Mech., vol. 781, 2015, pp. 166–195), Goto & Vassilicos (Phys. Lett. A, vol. 379 (16), 2015, pp. 1144–1148) and Obligado et al. (Phys. Rev. Fluids, vol. 1 (4), 2016, 044409) is consistent with a different scaling of . We present results from a direct numerical simulation of a spatially developing axisymmetric and self-similar turbulent wake which supports this conclusion and the assumptions that it is based on.
Issue Date: 25-May-2017
Date of Acceptance: 20-Apr-2017
URI: http://hdl.handle.net/10044/1/49540
DOI: https://dx.doi.org/10.1017/jfm.2017.262
ISSN: 0022-1120
Publisher: Cambridge University Press
Start Page: 440
End Page: 457
Journal / Book Title: Journal of Fluid Mechanics
Volume: 821
Copyright Statement: © 2017 Cambridge University Press. This paper has been accepted for publication and will appear in a revised form, subsequent to peer-review and/or editorial input by Cambridge University Press.
Sponsor/Funder: Commission of the European Communities
Funder's Grant Number: 320560
Keywords: Science & Technology
Technology
Physical Sciences
Mechanics
Physics, Fluids & Plasmas
Physics
turbulence simulation
turbulence theory
turbulent flows
WAKE
JET
ENTRAINMENT
LAYERS
FLOWS
01 Mathematical Sciences
09 Engineering
Fluids & Plasmas
Publication Status: Published
Appears in Collections:Faculty of Engineering
Aeronautics



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