Volume 34, Number 3, April 1996
|Page(s)||195 - 200|
|Section||Classical areas of phenomenology|
|Published online||01 September 2002|
Multifractal temperature and flux of temperature variance in fully developed turbulence
Laboratoire de Météorologie Dynamique, Box 99, 4, place Jussieu, 75252 Paris
cedex 05, France
2 McGill University, Physics Department, 3600 University Street, Montreal H3A 2T8, Canada
3 INRA Bioclimatologie - BP 81, 33883 Villenave d'Ornon Cédex, France
Accepted: 7 March 1996
We analyse the multifractal properties of the temperature field θ and temperature variance flux χ in atmospheric turbulence, using simultaneous velocity V and temperature measurements in the atmosphere. This permits us first to characterize the multifractal scaling moment function of the flux of temperature variance estimated as . We then study the structure function scaling exponent of the temperature field directly, and compare it to the consequences of the assumption of the independence of the fluctuations of θ and V . Up until moment orders of at least order 6, the data analysis is consistent with independence.
PACS: 47.27.-i – Turbulent flows, convection, and heat transfer / 47.27.Gs – Isotropic turbulence; homogeneous turbulence / 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion
© EDP Sciences, 1996
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