Spectra and statistics of velocity and temperature fluctuations in turbulent convection

被引：70

作者：

Ashkenazi, S ^{[1
]}

Steinberg, V ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Phys Complex Syst, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.83.4760

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Direct measurements of the velocity in turbulent convection of SF6 near its gas-liquid critical point by light scattering on the critical density fluctuations were conducted. The temperature, velocity, and cross frequency power spectra in a wide range of the Rayleigh and Prandtl numbers show scaling behavior with indices, which are rather close to the Bolgiano-Obukhov scaling in the wave number domain. The statistics of the velocity fluctuations remain Gaussian up to the Reynolds numbers of 10(5).

引用

页码：4760 / 4763

页数：4

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