Space-time characteristics of the wall shear-stress fluctuations in a low-Reynolds-number channel flow

被引：47
作者：
Jeon, S
Choi, H [1 ]
Yoo, JY
Moin, P
机构：
[1] Seoul Natl Univ, Sch Mech & Aerosp Engn, Seoul 151742, South Korea
[2] Stanford Univ, Ctr Turbulence Res, Stanford, CA 94305 USA
[3] Seoul Natl Univ, Inst Adv Machinery & Design, Ctr Turbulence & Flow Control Res, CRI, Seoul 151, South Korea
来源：
PHYSICS OF FLUIDS | 1999年 / 11卷 / 10期
关键词：
D O I：
10.1063/1.870166
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A database obtained by direct numerical simulation of turbulent channel flow is used to compute the frequency/wave number spectra of the wall shear-stress fluctuations. Auto- and cross-correlations of the wall shear-stress and pressure fluctuations are obtained in space and time domains. The convection velocities as a function of frequency, wave number, and spatial and temporal separations are calculated. The overall convection velocities of wall shear-stress fluctuations for the most energetic structures are obtained and the validity of Taylor's hypothesis is confirmed. (C) 1999 American Institute of Physics. [S1070-6631(99)03510-2].
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收藏
页码：3084 / 3094
页数：11
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