A numerical analysis of the three-dimensional rayleigh-benard convection spectra

The problem of the incompressible liquid convection between two horizontal planes heated on the underside is considered in the three-dimensional statement. The horizontal boundaries are assumed to be free of tangential stresses and isothermal. The calculated temporal spectrum of the temperature puls...

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Bibliographic Details
Published in:Izvestiya. Atmospheric and oceanic physics 2009-10, Vol.45 (5), p.646-653
Main Author: Palymskii, I. B.
Format: Article
Language:English
Subjects:
Climatology
Convection
Earth and Environmental Science
Earth Sciences
Geophysics/Geodesy
Marine
Numerical analysis
Physics
Supercritical processes
Turbulence
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Summary:The problem of the incompressible liquid convection between two horizontal planes heated on the underside is considered in the three-dimensional statement. The horizontal boundaries are assumed to be free of tangential stresses and isothermal. The calculated temporal spectrum of the temperature pulsations at the convection cell center at a supercriticality of 410 agrees well with the experimental measurement result. The Bolgiano-Obukhov (BO), k −11/5 , k −3 , and k −5 , were obtain for the velocity pulsations. The Kolmogorov spectra k −5/3 and k −2.4 were obtained for the temperature pulsations. The presence of clearly identified spectra in the convective flow under study allows this process to be characterized as developed turbulence.
ISSN:0001-4338
1555-628X
DOI:10.1134/S0001433809050119