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Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
September, 14-18, 2009, Rome, Italy

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf


ISBN Print: 978-1-56700-262-1

ISSN: 2377-2816

Search for the "ultimate state" in turbulent Rayleigh- Bénard convection

page 4
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.630
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ABSTRACT

Heat-transport measurements were made in a cylindrical turbulent Rayleigh-Bénard convection experiment in a new High-Pressure Convection Facility (HPCF) at the Max Planck Institute for Dynamics and Self-Organization in Göttingen. The cell was L = 2.24 m tall and had a diameter D = 1.12 m. It was filled with N2 or SF6 gas and operated under pressures of up to 15 bars. These measurements covered Rayleigh numbers up to 3 × 1014. They did not reveal a transition to an "ultimate regime" and thus are consistent with measurements by Niemela et al. but differ from those of Chavanne et al..

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