Abstract
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 language | English (US) |
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Pages (from-to) | 1-12 |
Number of pages | 12 |
Journal | Journal of Fluid Mechanics |
Volume | 469 |
DOIs | |
State | Published - Oct 25 2002 |