| Issue |
Europhys. Lett.
Volume 69, Number 1, January 2005
|
|
|---|---|---|
| Page(s) | 75 - 80 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2004-10373-4 | |
| Published online | 08 December 2004 | |
Logarithmically modified scaling of temperature structure functions in thermal convection
1
International Center for Theoretical Physics - Strada Costiera 11, 34100 Trieste, Italy
2
ICAR - P.O. Box 31155, Jerusalem 91000, Israel
Received:
29
April
2004
Accepted:
3
September
2004
Using experimental data on thermal convection, obtained at a
Rayleigh number of 1.5 
, it is shown that the
temperature structure functions 
,
where 
is the absolute value of the temperature
increment over a distance r, can be well represented in an
intermediate range of scales by 
,
where the 
are the scaling exponents appropriate to the
passive scalar problem in hydrodynamic turbulence and the function
. Measurements are made in the
midplane of the apparatus near the sidewall, but outside the
boundary layer.
PACS: 47.27.Te – Convection and heat transfer / 47.27.Jv – High-Reynolds-number turbulence
© EDP Sciences, 2005
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