Print Email Facebook Twitter Aspect-ratio dependence of the transition to the ultimate state of turbulent Rayleigh-Bénard convection Part of: 15th EuropeanTurbulence Conference 2015 (ETC15)· list the conference papers Title Aspect-ratio dependence of the transition to the ultimate state of turbulent Rayleigh-Bénard convection Author Bodenschatz, E. He, X. Ahlers, G. Van Gils, D. Date 2015-08-27 Abstract We report on measurements of the ultimate-state transition in turbulent Rayleigh-B\'enard convection obtained in a large facility known as the ``Uboot of G\"ottingen" and using pressurized sulfur hexafluoride as the convecting fluid. We found that the transition occurs over a range of $Ra$ which becomes more narrow as $\Gamma$ increases, ranging from $Ra_1^*$ which is at most weakly dependent on $\Gamma$ and close to $10^{13}$ to $Ra_2^*$ which varies from about $2\times 10^{15}$ for $\Gamma = 0.33$ to about $7\times 10^{13}$ for $\Gamma = 1.00$. To reference this document use: http://resolver.tudelft.nl/uuid:3b9ef57e-e88b-4577-8751-1d71dea4c834 Part of collection Conference proceedings Document type conference paper Rights (c) 2015 the Authors Files PDF 210.pdf 761.82 KB Close viewer /islandora/object/uuid:3b9ef57e-e88b-4577-8751-1d71dea4c834/datastream/OBJ/view