Spectra of local and averaged scalar fields in turbulence

Year: 1993

Authors: Chilla F., Ciliberto S., Innocenti C., Pampaloni E.

Autors Affiliation: Eccole Normale Superieure de Lyon, France; Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy

Abstract: We report experimental evidence of a new property of turbulent thermal convection. We show that the spectra of temperature fluctuations obtained from local and averaged measurements coincide. This new result is theoretically demonstrated by using only the hypothesis of isotropy of the turbulence field and it could be applied to the transport of passive scalars in any turbulent flow.

Journal/Review: EPL

Volume: 22 (1)      Pages from: 23  to: 28

KeyWords: RAYLEIGH-BENARD CONVECTION; FLUX;
DOI: 10.1209/0295-5075/22/1/005

Citations: 17
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