Measurement of Local Dissipation Scales in Turbulent Pipe Flow

被引：31
|
作者：
Bailey, S. C. C. [1 ]
Hultmark, M. [1 ]
Schumacher, J. [2 ]
Yakhot, V. [3 ]
Smits, A. J. [1 ]
机构：
[1] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08540 USA
[2] Tech Univ Ilmenau, Dept Mech Engn, D-98684 Ilmenau, Germany
[3] Boston Univ, Dept Mech Engn, Boston, MA 02215 USA
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 01期
基金：
加拿大自然科学与工程研究理事会;
关键词：
HIGH-REYNOLDS-NUMBER;
D O I：
10.1103/PhysRevLett.103.014502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Local dissipation scales are a manifestation of the intermittent small-scale nature of turbulence. We report the first experimental evaluation of the distribution of local dissipation scales in turbulent pipe flows for a range of Reynolds numbers: 2.4x10(4)< Re-D < 7.0x10(4). Our measurements at the nearly isotropic pipe center line and within the anisotropic logarithmic layer show excellent agreement with distributions that were previously calculated from numerical simulations of homogeneous isotropic box turbulence and with those predicted by theory. The reported results suggest a universality of the smallest-scale fluctuations around the classical Kolmogorov dissipation length.
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页数：4
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