Non-equilibrium scaling laws in axisymmetric turbulent wakes

被引:89
|
作者
Dairay, T. [1 ]
Obligado, M. [1 ]
Vassilicos, J. C. [1 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, Dept Aeronaut, Turbulence Mixing & Flow Control Grp, London SW7 2AZ, England
基金
英国工程与自然科学研究理事会;
关键词
turbulence simulation; turbulence theory; wakes; SCHEMES;
D O I
10.1017/jfm.2015.493
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
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.
引用
收藏
页码:166 / 195
页数:30
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