SPECTRAL CHARACTERISTICS OF MOMENTUM AND HEAT-TRANSFER IN THE TURBULENT WAKE OF A CIRCULAR-CYLINDER

被引：30

作者：

ANTONIA, RA ^{[1
]}

ZHOU, Y ^{[1
]}

MATSUMURA, M ^{[1
]}

机构：

[1] KITAMI INST TECHNOL,DEPT APPL MECH ENGN,KITAMI,HOKKAIDO 090,JAPAN

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 1993年 / 6卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

TURBULENCE; VORTEX SHEDDING FREQUENCY; CIRCULAR CYLINDER; TURBULENT PRANDTL NUMBER;

D O I：

10.1016/0894-1777(93)90015-B

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The cospectrum between the velocity fluctuations u (longitudinal) and nu (lateral) in the intermediate wake of a circular cylinder can exhibit a change of sign around the average vortex shedding frequency. A possible explanation for this sign change is proposed. There is no corresponding sign change in the cospectrum between nu and the temperature fluctuation theta, pointing to an important difference between the ways in which momentum and heat are transported by the vortices. The nutheta cospectrum is enhanced at the shedding frequency, and accordingly the turbulent Prandtl number assumes relatively small values.

引用

页码：371 / 375

页数：5

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