| Issue |
Europhys. Lett.
Volume 62, Number 6, June 2003
|
|
|---|---|---|
| Page(s) | 822 - 828 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2003-00446-x | |
| Published online | 01 June 2003 | |
Statistical properties of the fluctuations of the heat transfer in turbulent convection
Laboratoire de Physique Statistique, Ecole Normale Supérieure, UMR 8550 24 rue Lhomond, 75 005 Paris, France
Received:
6
January
2003
Accepted:
15
April
2003
We report measurements of the temporal fluctuations of the heat
flux in Rayleigh-Bénard turbulent convection in various fluids
and geometries. We observe that the rms fluctuations of the heat
flux increase nearly proportionally to the temperature difference
. The ratio of the rms fluctuations of the heat flux to
their mean display a power law, 
on two decades in
Rayleigh number (
). We discuss this
law as well as the non-Gaussian character of the probability
density function of the heat flux.
PACS: 47.27.-i – Turbulent flows, convection, and heat transfer
© EDP Sciences, 2003
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