Spectra and Statistics of Velocity and Temperature Fluctuations in Turbulent Convection
- 6 December 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 83 (23), 4760-4763
- https://doi.org/10.1103/physrevlett.83.4760
Abstract
Direct measurements of the velocity in turbulent convection of 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 .
Keywords
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