High-Rayleigh-number convection of pressurized gases in a horizontal enclosure

A. S. Fleischer, R. J. Goldstein

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30 Scopus citations


High-pressure gases are used to study high-Rayleigh-number Rayleigh-Bénard convection in cylindrical horizontal enclosures. The Nusselt-Rayleigh heat transfer relationship is investigated for 1 × 109 < Ra < 1.7 × 1012. Schlieren video images of the flow field are recorded through optical viewports in the pressure vessel. The data set is well correlated by Nu = 0.071Ra0.328. The schlieren results confirm the existence of a large-scale flow that periodically interrupts the ascending and descending plumes. The intensity of both the plumes and the large-scale flow increases with Rayleigh number.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalJournal of Fluid Mechanics
StatePublished - Oct 25 2002


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