Non-equilibrium scaling laws in axisymmetric turbulent wakes

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Title: Non-equilibrium scaling laws in axisymmetric turbulent wakes
Authors: Dairay, T
Obligado, M
Vassilicos, JC
Item Type: Journal Article
Abstract: We present a combined direct numerical simulation and hot-wire anemometry study of an axisymmetric turbulent wake. The data lead to a revised theory of axisymmetric turbulent wakes which relies on the mean streamwise momentum and turbulent kinetic energy equations, self-similarity of the mean flow, turbulent kinetic energy, Reynolds shear stress and turbulent dissipation profiles, non-equilibrium dissipation scalings and an assumption of constant anisotropy. This theory is supported by the present data up to a distance of 100 times the wake generator’s size, which is as far as these data extend.
Issue Date: 16-Sep-2015
Date of Acceptance: 18-Aug-2015
URI: http://hdl.handle.net/10044/1/42346
DOI: http://dx.doi.org/10.1017/jfm.2015.493
ISSN: 1469-7645
Publisher: Cambridge University Press
Start Page: 166
End Page: 195
Journal / Book Title: Journal of Fluid Mechanics
Volume: 781
Copyright Statement: © 2015 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
wakes
FLOWS
SCHEMES
Fluids & Plasmas
01 Mathematical Sciences
09 Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Aeronautics



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