Boundary-layer and scaling properties in turbulent thermal-convection

Year: 1993

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

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

Abstract: We describe an experiment which has been designed to measure both spatial and temporal features of turbulent thermal convection in a fluid layer heated from below. Specifically we have studied the dependence of the heat flow vs. the Rayleigh number, the thermal boundary layer profile, the temperature probability distribution function, the frequency and wave number power spectra. All the results have been compared with recent theories. The relevant scales of the problem, the Bolgiano and dissipative lengths, are also computed as a function of control parameters.

Journal/Review: NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS

Volume: 15 (9)      Pages from: 1229  to: 1249

KeyWords: RAYLEIGH-BENARD CONVECTION; TEMPERATURE-FLUCTUATIONS; HELIUM-GAS; SIMULATIONS; VELOCITY
DOI: 10.1007/BF02451729

Citations: 77
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